Material taken from Fluid Power Circuits and Controls, John S. Cundiff, 2001

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Material taken from Fluid Power Circuits and Controls, John S. Cundiff, 2001"

Transcription

1 Pressure Control Chapter 3 Material taken from Fluid Power Circuits and Controls, John S. Cundiff, 2001 Introduction Pressure control is a key element in the design of any circuit. Used correctly, it can achieve a given functional objective, as well as safe operation. In circuit design the pressure must be limited to a level below the working pressure of the lowest-rated component in the circuit. 1

2 Introduction Six pressure-control valves are discussed: Relief valves Unloading valves Sequence valves Pressure-reducing valves Counterbalance valves Brake valves Introduction Each of these valves works on the same principle; a spring force balances a hydraulic force. The hydraulic force is produced by fluid pressure acting on a given area. When hydraulic force exceeds the spring force, the valve spool moves. 2

3 Primary Flow Control Valves Introduced Review of Needed Symbols An open-center (float) valve allows flow between all four ports when the valve is in the center (nonactuated) position. The actuator (downstream from the valve) is not held in position but is free to float. 3

4 Review of Needed Symbols The open-center valve also allows free flow from the inlet port to the return (or tank) port, but it blocks the actuator ports. The actuator can not move (neglecting leakage) when the opencenter valve is in the center position. Review of Needed Symbols The closed- center valve has all four ports blocked when it is in the center position. There is no pathway through the valve between any of the four ports. 4

5 Relief Valve The relief valve is used to limit pressure in an entire circuit. It is generally the first component downstream from the pump. Relief valves can be direct acting or pilot operated. Direct-Acting Relief Valve Pressure acts on the annular area of the valve spool. The hydraulic force is given by F h = Pa a Where F h = hydraulic force (lb f ) P = pressure (psi) A a = annular area (in 2 ) 5

6 Direct-Acting Relief Valve The notation F s will be used for the spring force. When F h equals F s, the valve cracks open, meaning that the spool lifts off its seat and allows fluid to flow to the reservoir. As pressure increases, the spool lifts higher, allowing more flow to bypass to the reservoir. At some pressure level, the total flow bypasses to the reservoir. Direct-Acting Relief Valve A typical flow vs. pressure curve for a direct-acting relief valve is shown. The valve is set to open at 1500 psi. This pressure is known as the cracking pressure. 6

7 Direct-Acting Relief Valve At 2000 psi, the valve is fully open, and all flow is bypassed to the reservoir. The 500 psi differential between cracking and full bypass is needed in direct-acting valve when it is used for flow control, as well as pressure limiting. Direct-Acting Relief Valve In this circuit, the flow control valve is an adjustable orifice. When the flow control valve is partly closed, a pressure drop is created across the valve. Relief valve pressure = pressure drop across the flow control valve plus the pressure drop across the motor. 7

8 Direct-Acting Relief Valve Motor speed is controlled by closing the flow control valve enough to crack open the relief valve. Part of the pump output now bypasses to the reservoir; thus, flow to the motor is reduced, and the speed decreases. Pilot-Operated Relief Valve A pilot-operated relief valve has a different pressure vs. flow curve then the direct acting valve. The pilot-operated valve opens completely over a narrow pressure range. This allows the circuit to operate over a wider pressure range without loss of fluid over the relief valve. 8

9 Pilot-Operated Relief Valve The main spool has a small hole (orifice) drilled in the skirt. Because of this hole, pressure is the same on the top and bottom of the skirt. As long as there is negligible flow through the orifice, there is no pressure drop across the orifice. 9

10 Pilot-Operated Relief Valve The pilot section is on top of the valve. A dart is held in place by the pilot spring. When the hydraulic force on this dart becomes greater than the pilot spring force, the dart is unseated, and fluid flows from the cavity above the skirt, through an internal drain to the valve outlet. Pilot-Operated Relief Valve Flow through the orifice replaces the fluid lost from the cavity above the skirt. The spool is still held in position by the main spool spring. 10

11 Pilot-Operated Relief Valve The key advantage of a pilot-operated valve is that it allows the designer to use pressure to within 100 psi of the valve setting to meet the functional objective of the circuit. In comparison, the direct-acting valve cracks open at 1500 psi, and pressure must increase to 2000 psi before it is fully open. Pilot-Operated Relief Valve A pilot-operated relief valve can be used with a remote pilot. The remote pilot functions like the pilot built into the top of the main relief valve. It allows the designer to set two pressure levels with one main relief valve. A pilot-operated relief valve can be used to unload the pump at low pressure during periods between work cycles. 11

12 Example Circuits Using Pilot- Operated Relief Valves A diagram of the circuit that uses a pilot-operated relief valve to unload the pump at low pressure is shown. The relief valve symbol designated A refers to the main spool of the pilotoperated relief valve. 12

13 Example Circuits Using Pilot- Operated Relief Valves The orifice in the skirt is is orifice B, and the symbol designated with letter C is a symbol that shows that the valve is held closed with spring pressure and a pilot pressure. The relief valve symbol designated with a letter D refers to the pilot stage of the valve (dart held in place with the pilot spring). Example Circuits Using Pilot- Operated Relief Valves Using the pilot-operated relief valve to unload the pump between work cycles is shown on the following slide. Here, a special directional control valve is used with a fifth port. This port provides a pathway for the pilot line to be connected to the reservoir when the directional control valve is centered. 13

14 Example Circuits Using Pilot- Operated Relief Valves When the directional control valve is shifted, the pilot line is blocked, and the pilot-operated relief valve will not open until the pressure equals the pilot spring pressure plus the main spring pressure. 14

15 Example Circuits Using Pilot- Operated Relief Valves This circuit is designed to provide highpressure relief during extension and lowpressure relief during retraction. Unloading Valve The symbol for an unloading value is similar to the symbol for a relief valve except that the pilot line is not connected to sense pressure at the valve inlet. 15

16 Unloading Valve Example The accumulator is a key component in the circuit. There are three types of accumulators: Bladder Diaphragm Piston Unloading Valve The diaphragm accumulator is a pressure vessel divided into two compartments by a flexible diaphragm. The top half is precharged with a gas, generally nitrogen, and sealed. The bottom half is connected to the hydraulic circuit. 16

17 Unloading Valve The accumulator is designed for some rated pressure, and pressure must be controlled to ensure that it does not exceed this rating. The unloading valve accomplishes this task. An accumulator provides pressure to the actuator at the moment the directional control valve is shifted. Unloading Valve Pressure does not have to build from a low pressure as it does in a circuit with an opencenter directional control valve. If a large load is being moved, pressure must build to achieve enough force to overcome static friction and provide the inertial force to accelerate the mass. It takes an interval of time to build this pressure. This time delay can be eliminated if pressure is already available at the moment the directional control valve is shifted. 17

18 Unloading Valve In this circuit, the pump builds pressure in the accumulator until the setting of the unloading valve is reached. At this point, the unloading valve opens, and flow bypasses to the reservoir. The pressurized fluid is trapped in the accumulator by the check valve and the closedcenter directional control valve. Unloading Valve A functional diagram of an unloading valve is shown next. Two features are added to a pilotoperated relief valve to create the unloading valve. 18

19 A check valve is builtin, and a small piston is included in the top section in line with the dart and pilot spring. When the unloading valve is closed, fluid flows through the check valve to charge the accumulator. Unloading Valve Unloading Valve When the directional control valve is shifted, fluid drains from the accumulator and the pressure drops. The hydraulic force on the piston drops and, when the pilot spring force becomes greater, the dart reseats. At this point, pressure equalizes on both sides of the spool skirt. The spool spring reseats the spool and the pump begins to build pressure. 19

20 Unloading Valve When the accumulator is charged to the desired pressure, the unloading valve dumps flow to the reservoir. Unloading Valve Pressure drops at the directional control valve as the accumulator empties. The minimum pressure is a function of the load, the characteristics of the accumulator, and the characteristics of the pump. 20

21 Sequence and Pressure Reducing Valves The sequence valve and press-reducing valve have some similar features. Both valves are externally drained, meaning that there is a separate line from the valve back to the reservoir. The relief valve and unloading valve are both internally drained. Sequence and Pressure Reducing Valves The outlets of the sequence and pressure-reducing valves are not connected to the reservoirs, so they can not be internally drained. The check valve built into both valves is there to provide free flow in the reverse direction. In effect, it takes the valve out of the circuit when the flow is reversed. 21

22 Sequence and Pressure Reducing Valves As shown on the next slide, the sequence valve and pressure-reducing valve symbols are similar. The sequence valve is a normally closed valve with a pilot line to sense inlet pressure, and the pressure-reducing valve is a normally open valve with pilot line to sense outlet pressure. Sequence and Pressure Reducing Valves 22

23 Sequence Valve The sequence valve is used to ensure that a certain pressure level is achieved in one branch of the circuit before a second branch is activated. Consider a machining operation where the workpiece must be clamped with a certain force before it is extended to make contact with the cutting tool. If the piece is not securely fastened, it can slip and damage both the tool and the piece. Sequence Valve In this circuit, the sequence valve is set on 600 psi, meaning that the pressure must build to 600 psi before the valve opens. This setting ensures that the clamp cylinder exerts a 600-psi clamp force before the extend cylinder moves. 23

24 Sequence Valve When the directional control valve is shifted for reverse flow, the check valve provides free flow, and there is no sequencing of the cylinders. Either one can retract before the other, depending on the pressure required for retraction. The cylinder with the lowest pressure requirement always retracts first. Pressure Reducing Valve A pressure-reducing valve does not allow pressure downstream of the valve to exceed the set point. Suppose the workpiece must be clamped with two clamps. The second clamp is placed at a point where too much clamping force will damage the workpiece. A pressure-reducing valve is used to limit clamping pressure. 24

25 Figure 3.23 Pressure-reducing valve used to limit clamping force. The valve is a second type of pressurereducing valve, the reducing/relieving valve. This valve operates like the pressurereducing valve except that it bypasses fluid to the reservoir when the spool is shifted upward by the hydraulic force. Pressure Reducing Valve The orifice between the inlet and bypass (to reservoir) opens as pressure increases, so the valve functions like a relief valve. It combines the functions of the pressure-reducing valve and the relief valve, thus the name reducing/relieving valve. 25

26 Counterbalance and Brake Valve The counterbalance valve and brake valve have similar symbols. The single difference is that the brake valve has a remote pilot line in addition to an upstream pilot line. As with the sequence and pressurereducing valves, a check valve is built in to allow free flow in the reverse direction. Figure 3.26 Symbols for counterbalance and brake valves. 26

27 Counterbalance and Brake Valve Resistive load: a load that acts in the opposite direction to actuator motion. Overrunning load: a load that acts in the same direction as actuator motion. Counterbalance Valve The counterbalance valve, also called a holding valve, is used to prevent a weight from falling uncontrollably. When the directional control is shifted, the platen will fall unless there is a means for creating an opposing hydraulic force. A counterbalance valve accomplishes this task. 27

28 Counterbalance Valve Generally, the valve is set about 50 psi higher than the pressure required to hold the load. Often it is desirable to use the weight of the platen to help build the total pressing force. In this case, a counterbalance valve with remote pilot line connection is used. If pressure at the cap end, and thus the pilot line, drops below the set point, the counterbalance valve partly closes to slow the platen. 28

29 Counterbalance Valve There is an additional reason for using a counterbalance valve other than to prevent uncontrolled motion of the actuator. When the platen is moving down too fast, the pump can not keep the cap end filled with fluid, and a negative pressure can develop. It is possible to suck the fluid out of the pump fast enough to cause void spaces in the pump. The condition when the pump is not completely filled with fluid is called cavitation. 29

30 Brake Valve A brake valve performs the same function as a counterbalance valve, but it is designed to overcome a key disadvantage. The pressure drop across the counterbalance valve is converted to heat; consequently, half the hydraulic power is wasted. A brake valve overcomes this. Brake Valve A brake valve has an internal pilot passage and a remote pilot passage. Suppose the spring is set for 1000 psi. When the pressure at the internal pilot reaches 1000 psi, the piston pushes the spool upward to open the valve. 30

31 Brake Valve The area in the piston is much less than the area of the bottom of the spool. A typical area ratio might be 10:1. The remote pilot applies pressure directly to the bottom of the spool; consequently, only 100 psi is required to compress the spring and open the valve. Pressure required to open the valve is 1000 psi at the internal pilot and 100 psi at the remote pilot. Brake Valve A brake valve is used in this circuit. It requires 100 psi at the motor inlet to keep the valve open. As long as the load on the motor requires more than 100 psi, the brake valve does not affect circuit efficiency. If the load starts to overrun, and the pressure drops below 100 psi, the brake valve closes. 31

32 Brake Valve It requires 1000 psi at the direct, or internal, pilot to open the valve. This 1000-psi pressure drop across the brake valve converts the mechanical energy of the overrunning load to heat energy and slows the load. When pressure at the inlet builds to 100 psi again, the brake valve opens. 32

hance the application of specific components, such as pumps, motors, accumulators, filters, and airline lubricators.

hance the application of specific components, such as pumps, motors, accumulators, filters, and airline lubricators. Basic circuits Using schematic symbols as building blocks, you can construct a functional diagram showing piping arragnements and operation of any hydraulic or pneumatic circuit. hance the application

More information

Lecture 18 PRESSURE-CONTROL VALVES

Lecture 18 PRESSURE-CONTROL VALVES Lecture 18 Learning Objectives PRESSURE-CONTROL VALVES Upon completion of this chapter, the student should be able to: Explain various functions of pressure-control valves. Explain various classifications

More information

Example. Fluid Power. Circuits

Example. Fluid Power. Circuits Example Fluid Power Circuits To Enhance Symbol Reading Skills To Work On Circuit Reading Skills With Answers HI LO Pump Circuit 18 A1 B1 17 16 15 13 Set 14 2,000 PSI PG2 Set 500 PSI 12 11 7 8 10 PG1 9

More information

WHAT YOU DON T KNOW ABOUT ACCUMULATORS CAN KILL YOU!

WHAT YOU DON T KNOW ABOUT ACCUMULATORS CAN KILL YOU! WHAT YOU DON T KNOW ABOUT ACCUMULATORS CAN KILL YOU! Atlanta (Monroe) GA 770-267-3787 gpm@gpmhydraulic.com www.gpmhydraulic.com What You Don t Know About Hydraulic Accumulators Can Kill You TABLE OF CONTENTS

More information

Pilot Operated Check Valves

Pilot Operated Check Valves Pilot Operated Check Valves The check valves in Fig.1 operate like a standard check valve but are able to have reverse flow when required. They are called Pilot to Open Check Valves since they are normally

More information

Unit 24: Applications of Pneumatics and Hydraulics

Unit 24: Applications of Pneumatics and Hydraulics Unit 24: Applications of Pneumatics and Hydraulics Unit code: J/601/1496 QCF level: 4 Credit value: 15 OUTCOME 2 TUTORIAL 2 HYDRAULIC AND PNEUMATIC CYLINDERS The material needed for outcome 2 is very extensive

More information

UNDERSTANDING SCHEMATICS. Introduction

UNDERSTANDING SCHEMATICS. Introduction UNDERSTANDING SCHEMATICS Introduction When hydraulic systems are designed, whether on paper or computer, the layout of the system is expressed in what is called a schematic. A schematic is a line drawing

More information

COUNTERBALANCE VALVES

COUNTERBALANCE VALVES COUNTERBALANCE VALVES Introduction They are modulating valves which allow free flow into the actuator and then block the reverse flow until they feel a pilot pressure inversely proportional to the load

More information

CHAPTER 12 PROPORTIONAL VALVES

CHAPTER 12 PROPORTIONAL VALVES CHATER ROORTIONAL VALVES Fluid ower Circuits and Controls, John S.Cundiff, 00 Introduction roportional valves were developed for applications where the precision of a servo valve is not needed, but more

More information

The Secret of Hydraulic Schematics. BTPHydraulics www.iranfluidpower.com

The Secret of Hydraulic Schematics. BTPHydraulics www.iranfluidpower.com The Secret of Hydraulic Schematics BTPHydraulics www.iranfluidpower.com www.iranfluidpower.com Table of Contents The Secret to Reading and Interpreting Hydraulic Schematics... 1 Hydraulic System Schematics...

More information

Pressure Relief and Regulating Valves

Pressure Relief and Regulating Valves Pressure Relief and Regulating Valves With blocked center directional valves and variable displacement pumps, or open center directional valves and fixed displacement pumps where fast response, low leakage

More information

LECTURE 28 to 29 ACCUMULATORS FREQUENTLY ASKED QUESTIONS

LECTURE 28 to 29 ACCUMULATORS FREQUENTLY ASKED QUESTIONS LECTURE 28 to 29 ACCUMULATORS FREQUENTLY ASKED QUESTIONS 1. Define an accumulator and explain its function A hydraulic accumulator is a device that stores the potential energy of an incompressible fluid

More information

Actuation systems. Control code Command Signal. Microprocessor or Microcontroller PLANT

Actuation systems. Control code Command Signal. Microprocessor or Microcontroller PLANT Actuation systems Actuation systems are the elements of control systems which are responsible for transforming the output of a microcontrollers or microprocessor or control system into a controlling action

More information

SUBJECT: HYDRAULIC CHECK VALVES AND FLOW CONTROL VALVES

SUBJECT: HYDRAULIC CHECK VALVES AND FLOW CONTROL VALVES SUBJECT: HYDRAULIC CHECK VALVES AND FLOW CONTROL VALVES ABOUT THE SESSION This session deals with check valves, flow control valves, its functions, operations and application. INTRODUCTION Check Valve:

More information

Series PVP Variable Volume, Piston Pumps

Series PVP Variable Volume, Piston Pumps Variable Volume, Piston Pumps Catalog 2600-102/USA Introduction Quick Reference Data Chart Pump Model Displacement cc/rev (In 3 /rev) Pump Delivery *Approx. Noise Levels db(a) Horsepower At Pressure @

More information

Unit 24: Applications of Pneumatics and Hydraulics

Unit 24: Applications of Pneumatics and Hydraulics Unit 24: Applications of Pneumatics and Hydraulics Unit code: J/601/1496 QCF level: 4 Credit value: 15 OUTCOME 2 TUTORIAL 4 DIRECTIONAL CONTROL VALVES The material needed for outcome 2 is very extensive

More information

Lecture 15 DIRECTIONAL CONTROL VALVES

Lecture 15 DIRECTIONAL CONTROL VALVES Lecture 15 Learning Objectives DIRECTIONAL CONTROL VALVES Upon completion of this chapter, the student should be able to: List different types of valves used in fluid power. Explain various classifications

More information

Daniel. Liquid Control Valves Technical Guide. Technical Guide DAN-LIQ-TG-44-rev0813. DAN-LIQ-TG-44-rev0208. February 2008.

Daniel. Liquid Control Valves Technical Guide. Technical Guide DAN-LIQ-TG-44-rev0813. DAN-LIQ-TG-44-rev0208. February 2008. DAN-LIQ-TG-44-rev0208 February 2008 Daniel Liquid Control Valves Technical Guide www.daniel.com Daniel Measurement and Control Theory, Principle of Operation and Applications This brochure has been prepared

More information

Interpret device and circuit operating from drawings Apply schematic readings in circuit diagnostics

Interpret device and circuit operating from drawings Apply schematic readings in circuit diagnostics Supplemental Read, follow, and understand schematics Electrical Hydraulic Pneumatic Interpret device and circuit operating from drawings Apply schematic readings in circuit diagnostics ECET 257 Consumer

More information

Solenoid Operated Directional Valves

Solenoid Operated Directional Valves Solenoid Operated Directional Valves Applications Solenoid operated valves differ from manually and hydraulically pilot-operated valves in that they are electrically controlled as opposed to using complex

More information

Schematic Symbols Chart (Design Hydraulic and Pneumatic circits)

Schematic Symbols Chart (Design Hydraulic and Pneumatic circits) Page 1 of 6 (Home) Symbols / Visit us on: Fluid Power, Automation and Motion Control for all Industries About Us Products Services Catalogs Place an Order Training & Information Contact Us Employee Access

More information

SIMPLIFIED VALVE CIRCUIT GUIDE

SIMPLIFIED VALVE CIRCUIT GUIDE SIMPLIFIED CIRCUIT GUIDE A GUIDE TO UNDERSTANDG PNEUMATIC DIRECTIONAL CONTROL S SOLENOID NO. 0 OUT 0 FLOW CONTROL METERED- FREE FLOW 0 0 OUT CYLDER TENDED Z-00 Compressed Air Valves Directional control

More information

HYDRAULIC CIRCUIT DESIGN AND ANALYSIS

HYDRAULIC CIRCUIT DESIGN AND ANALYSIS HYDRAULIC CIRCUI DESIGN AND ANALYSIS A Hydraulic circuit is a group of components such as pumps, actuators, and control valves so arranged that they will perform a useful task. When analyzing or designing

More information

Unit 24: Applications of Pneumatics and Hydraulics

Unit 24: Applications of Pneumatics and Hydraulics Unit 24: Applications of Pneumatics and Hydraulics Unit code: J/601/1496 QCF level: 4 Credit value: 15 OUTCOME 2 TUTORIAL 1 HYDRAULIC PUMPS The material needed for outcome 2 is very extensive so there

More information

MASTER CYLINDER. Section 2. Master Cylinder. Tandem Master Cylinder. Master Cylinder

MASTER CYLINDER. Section 2. Master Cylinder. Tandem Master Cylinder. Master Cylinder MASTER CYLINDER Master Cylinder The master cylinder converts the motion of the brake pedal into hydraulic pressure. It consists of the reservoir tank, which contains the brake fluid; and the piston and

More information

Chapter 4: Control components in Hydraulic system

Chapter 4: Control components in Hydraulic system Chapter 4: Control components in Hydraulic system One of the most important functions in any fluid power system is control. If control components are not properly selected, the entire system will fail

More information

Why and How we Use Capacity Control

Why and How we Use Capacity Control Why and How we Use Capacity Control On refrigeration and air conditioning applications where the load may vary over a wide range, due to lighting, occupancy, product loading, ambient weather variations,

More information

OPERATORS MANUAL TROUBLESHOOTING SECTION

OPERATORS MANUAL TROUBLESHOOTING SECTION OPERATORS MANUAL TROUBLESHOOTING SECTION KMW Ltd. 198 N. Hwy 281 Great Bend, Kansas 67530 800 445-7388 Fax 620 793-6737 ïïïkâãïäç~çéêëkåçã 1. TROUBLE SHOOTING PROCEDURES This Trouble Shooting Chart is

More information

Basic Symbols. Lines. Circular. Square. Diamond. Miscellaneous Symbols. -continuous line - flow line. -dashed line - pilot, drain

Basic Symbols. Lines. Circular. Square. Diamond. Miscellaneous Symbols. -continuous line - flow line. -dashed line - pilot, drain Airline Hydraulic's Main Page Basic Symbols Lines continuous line flow line dashed line pilot, drain envelope long and short dashes around two or more component symbols. Circular Square Diamond large circle

More information

SIMPLIFIED VALVE CIRCUIT GUIDE

SIMPLIFIED VALVE CIRCUIT GUIDE NA-09 FLOW CONTROL METERED- FREE FLOW UT OUT CYLDER TENDED SOLENOID NO. A Guide to Understanding Pneumatic Directional Control Valves SIMPLIFIED CIRCUIT GUIDE 0 0 0 0 Compressed Air Valves Directional

More information

Fluid Power Circuits and Controls, John S.Cundiff, 2001

Fluid Power Circuits and Controls, John S.Cundiff, 2001 HYDROSTATIC TRANSMISSIONS Fluid Power Circuits and Controls, John S.Cundiff, 2001 Introduction Focus The characteristics of hydrostatic transmission will be compared with mechanical transmissions. 1 Mechanical

More information

APPLIED PNEUMATICS AND HYDRAULICS H TUTORIAL HYDRAULIC AND PNEUMATIC CYLINDERS. This work covers part of outcome 2 of the standard Edexcel module.

APPLIED PNEUMATICS AND HYDRAULICS H TUTORIAL HYDRAULIC AND PNEUMATIC CYLINDERS. This work covers part of outcome 2 of the standard Edexcel module. APPLIED PNEUMATICS AND HYDRAULICS H TUTORIAL HYDRAULIC AND PNEUMATIC CYLINDERS This work covers part of outcome 2 of the standard Edexcel module. The material needed for outcome 2 is very extensive so

More information

Trailer brake valve Trailer brake valve with adjustable predominance

Trailer brake valve Trailer brake valve with adjustable predominance Trailer brake valve with adjustable predominance 971 002 Application Purpose Maintenance Vehicles with conventional two-lien brake control (not Trailer EBS). To control the dual-line air braking system

More information

Check & Load Control Valves

Check & Load Control Valves Overview The HYDAC range of direct and pilot operated check valves provide a broad selection of cartridge and inline products with operating pressure rating of up to 6 psi (4 bar). All valves have a one

More information

Pressure Locking & Thermal Binding In Wedge Gate & Parallel Slide Gate Valves

Pressure Locking & Thermal Binding In Wedge Gate & Parallel Slide Gate Valves Pressure Locking & Thermal Binding In Wedge Gate & Parallel Slide Gate Valves CRANE Energy Flow Solutions TM Donald H. Johnson Crane Energy Flow Solutions 1 Crane Co. Resolution Made By Richard Teller

More information

MONO BLOCK DIRECTIONAL CONTROL VALVE TS1120TSLB

MONO BLOCK DIRECTIONAL CONTROL VALVE TS1120TSLB MONO BLOCK DIRECTIONAL CONTROL VALVE TS112TSLB TS TS212TSTSJB P T TS312TSDTSTKJ TS112TSJB FEATURES: O RG PORTS to eliminate leakage. POWER BEYOND CAPABILITY to fit your multi valve circuits. BUILT ANTI-DROP

More information

Vickers Hydraulic Pump on Boeing 747-8, and 777 Aircraft. P/N (Model PV D)

Vickers Hydraulic Pump on Boeing 747-8, and 777 Aircraft. P/N (Model PV D) Vickers Hydraulic Pump on Boeing 747-8, 747-400 and 777 Aircraft P/N 972952 (Model PV3-300-16D) Eaton's Vickers Hydraulic Pump on Boeing 747-8, 747-400 and 777 Aircraft P/N 972952 (Model PV3-300-16D)

More information

Fluid Power Systems The Basic System

Fluid Power Systems The Basic System This sample chapter is for review purposes only. Copyright The Goodheart-Willcox Co., Inc. All rights reserved. The general definition of a system is a set or group of principles, beliefs, things or parts

More information

Lecture 38 PNEUMATIC CONTROL VLAVES

Lecture 38 PNEUMATIC CONTROL VLAVES Lecture 38 PNEUMATIC CONTROL VLAVES Learning Objectives Upon completion of this chapter, Student should be able to Define the function of a valve Classify the valves Identify the DCVs as per ISO designation

More information

Hydraulic Trouble Shooting

Hydraulic Trouble Shooting Hydraulic Trouble Shooting Hydraulic systems can be very simple, such as a hand pump pumping up a small hydraulic jack, or very complex, with several pumps, complex valving, accumulators, and many cylinders

More information

Flow divider (flow distributor), type TQ

Flow divider (flow distributor), type TQ Flow divider (flow distributor), type TQ Pressure p max = 0 bar Flow Q CN max = 00 lpm Share ratio = :. General Task Flow dividers type TQ are self-regulating valves, which largely irrespective of the

More information

Chapter 7 Hydraulic System Troubleshooting

Chapter 7 Hydraulic System Troubleshooting Chapter 7 Hydraulic System Troubleshooting General The following troubleshooting information is provided as a general guide to identify, locate and correct problems that may be experienced with the hydraulic

More information

CENTRIFUGAL PUMP OVERVIEW Presented by Matt Prosoli Of Pumps Plus Inc.

CENTRIFUGAL PUMP OVERVIEW Presented by Matt Prosoli Of Pumps Plus Inc. CENTRIFUGAL PUMP OVERVIEW Presented by Matt Prosoli Of Pumps Plus Inc. 1 Centrifugal Pump- Definition Centrifugal Pump can be defined as a mechanical device used to transfer liquid of various types. As

More information

Basics, Components, Circuits and Cascade Design

Basics, Components, Circuits and Cascade Design (Pneumatic Systems ) Basics, Components, Circuits and Cascade Design Outlines Basics of Pneumatics Pneumatic Components Basic Pneumatic Circuits Cascade Design 1 Basic of Pneumatics Air The earth is surrounded

More information

FLUID POWER GRAPHIC SYMBOLS

FLUID POWER GRAPHIC SYMBOLS FLUID POWER GRAPHIC SYMBOLS ANSI Y32.10 GRAPHIC SYMBOLS 1. Introduction 1.1 General Fluid power systems are those that transmit and control power through use of a pressurized fluid (liquid or gas) within

More information

Vacuum Control. Vacuum Applications. Vacuum Regulators. Vacuum Breakers (Relief Valves) Vacuum Control Devices. Vacuum Terminology

Vacuum Control. Vacuum Applications. Vacuum Regulators. Vacuum Breakers (Relief Valves) Vacuum Control Devices. Vacuum Terminology Vacuum Applications Vacuum regulators and breakers are widely used in process plants. Conventional regulators and relief valves might be suitable for service if applied correctly. This section provides

More information

FLUTEC Pressure Relief Valves

FLUTEC Pressure Relief Valves FLUTEC Pressure Relief Valves Pressure Relief DB4E 1.1. up to 630 bar up to 30 l/min Connection housings 2 1. DESCRIPTION 1.1. GENERAL According to DIN -ISO 1219, DB4E are valves for oil hydraulic systems

More information

Check Valves. Direct and pilot operated check valve functions for applications up to 350 bar (5000 psi) and 227 L/min (60 USgpm)

Check Valves. Direct and pilot operated check valve functions for applications up to 350 bar (5000 psi) and 227 L/min (60 USgpm) Check Valves Direct and pilot operated check valve functions for applications up to 350 bar (5000 psi) and 7 L/min (60 USgpm) EATON Vickers Screw-In Cartridge Valves V-VLOV-MC00-E4 September, 007 - Check

More information

SUBCOURSE EDITION AL0926 BASIC HYDRAULIC SYSTEMS AND COMPONENTS

SUBCOURSE EDITION AL0926 BASIC HYDRAULIC SYSTEMS AND COMPONENTS SUBCOURSE EDITION AL0926 A BASIC HYDRAULIC SYSTEMS AND COMPONENTS BASIC HYDRAULIC SYSTEMS AND COMPONENTS Subcourse Number AL 0926 EDITION A US Army Aviation Logistics School Fort Eustis, Virginia 23604-5439

More information

Unit 24: Applications of Pneumatics and Hydraulics

Unit 24: Applications of Pneumatics and Hydraulics Unit 24: Applications of Pneumatics and Hydraulics Unit code: J/601/1496 QCF level: 4 Credit value: 15 OUTCOME 2 TUTORIAL 3 HYDRAULIC AND PNEUMATIC MOTORS The material needed for outcome 2 is very extensive

More information

PART 2 FORKLIFT HYDRAULIC SYSTEM

PART 2 FORKLIFT HYDRAULIC SYSTEM PART 2 FORKLIFT HYDRAULIC SYSTEM Chapter 1 Description and Operation Component Locations & Circuit Layouts 1 Hydraulic Pump 11 Control Valve 14 Valve Section Oil Flows 15 Anti-Cavitation Valve 22 Velocity

More information

Pneumatic control for robotics and industrial automation Author: Naresh Raghavan

Pneumatic control for robotics and industrial automation Author: Naresh Raghavan Pneumatic control for robotics and industrial automation Author: Naresh Raghavan Introduction Pneumatic systems form the most primitive and distinct class of mechanical control engineering. They are classified

More information

General Background. Closed Circuit Hydraulic Systems. Closed Circuit Hoisting. Safety Problems with Closed Circuit Hoisting

General Background. Closed Circuit Hydraulic Systems. Closed Circuit Hoisting. Safety Problems with Closed Circuit Hoisting Page 1 of 5 General Background High pressure, variable displacement piston hydraulic systems provide the best performance, efficiency and component life for use in high duty cycle offshore cranes. Piston

More information

Introduction to Pneumatics and Pneumatic Circuit Problems for FPEF Trainer

Introduction to Pneumatics and Pneumatic Circuit Problems for FPEF Trainer and Pneumatic Circuit Problems for FPEF Trainer John R. Groot President FPEF John Nagohosian FPEF Educational Coordinator John Prisciandaro Birmingham Covington School Birmingham, Michigan Dan Butchko

More information

DANFOSS Steering System Operation & Troubleshooting

DANFOSS Steering System Operation & Troubleshooting Section 5-1 DANFOSS Steering System Operation & Troubleshooting Foreword For a number of years Danfoss has marketed a hydrostatic steering system designed especially for large vehicles. Many large vehicles,

More information

Pressure Relief. Pressure Control Valve R(C)G(O)-03, 06 and 10; R(C)T(O)-03, 06 and 10 VICKERS. Basic Characteristics. Sectional Illustrations

Pressure Relief. Pressure Control Valve R(C)G(O)-03, 06 and 10; R(C)T(O)-03, 06 and 10 VICKERS. Basic Characteristics. Sectional Illustrations VICKERS Pressure Relief Pressure Control Valve R(C)G(O)-03, 06 and 10; R(C)T(O)-03, 06 and 10 Sectional Illustrations RCG-** Model Shown RCT-** Model Shown Basic Characteristics Type...................

More information

Electric vacuum pump for brake servo unit

Electric vacuum pump for brake servo unit Service. Self-Study Programme 257 Electric vacuum pump for brake servo unit Design and Function Cars fitted with a petrol engine in combination with an automatic gearbox which comply with the EU 4 Standard

More information

Signature and ISX CM870 Fuel System

Signature and ISX CM870 Fuel System Signature and ISX CM870 Fuel System Cummins Ontario Training Center HPI-TP Fuel System Heavy Duty High Pressure Injection - Time Pressure Fuel System The fuel system developed for the Signature and ISX

More information

*Rated to 207 Bar/3000 PSI with Aluminum Body. Catalog HY15-3501/US SERIES CAVITY DESCRIPTION FLOW PRESSURE PAGE NO.

*Rated to 207 Bar/3000 PSI with Aluminum Body. Catalog HY15-3501/US SERIES CAVITY DESCRIPTION FLOW PRESSURE PAGE NO. Bodies & Contents SERIES CAVITY DESCRIPTION FLOW PRESSURE PAGE NO. /GPM BAR/PSI STANDARD CHECKS D1A6... 2U... Valve Insert, Ball Type...145/38... 42/6... 5 D1B125... 2C... Valve Insert, Ball Type... 5/132...

More information

MONO BLOCK DIRECTIONAL CONTROL VALVE TS

MONO BLOCK DIRECTIONAL CONTROL VALVE TS SHIPPING: 2332 S 25TH STREET (ZIP 6815) MAILING: P.O. BOX #669 OMAHA, NE 6816 PHONE: (42) 344-4434 FAX: (42) 341-5419 HTTP://WWW.BRAND-HYD.COM MONO BLOCK DIRECTIONAL CONTROL VALVE TS TS312TSDTSTKJB TS2

More information

Chapter 11 SERVO VALVES. Fluid Power Circuits and Controls, John S.Cundiff, 2001

Chapter 11 SERVO VALVES. Fluid Power Circuits and Controls, John S.Cundiff, 2001 Chapter 11 SERVO VALVES Fluid Power Circuits and Controls, John S.Cundiff, 2001 Servo valves were developed to facilitate the adjustment of fluid flow based on the changes in the load motion. 1 Typical

More information

BRAKE SYSTEM DESIGN AND THEORY

BRAKE SYSTEM DESIGN AND THEORY RAKE SYSTEM DESIGN AND THEORY Aircraft brake systems perform multiple functions. They must be able to hold the aircraft back at full static engine run-up, provide adequate control during ground taxi operations,

More information

PUMP UNLOADING VALVES

PUMP UNLOADING VALVES www.elwood.com PUMP UNLOADING VALVES 9 0 0 1 : 0 0 0 C E R T I F I E D C O M P A N Y Features Designed for the manufacturing environment, Elwood offers a full line of Pump Unloading equipment specifically

More information

ACADEMIC TEXTBOOK FLUID POWER CONTROL SYSTEMS. The lecture: 15 hours. Kielce University of Technology Faculty of Mechatronics and Machine Design

ACADEMIC TEXTBOOK FLUID POWER CONTROL SYSTEMS. The lecture: 15 hours. Kielce University of Technology Faculty of Mechatronics and Machine Design ACADEMIC TEXTBOOK FLUID POWER CONTROL SYSTEMS The lecture: 15 hours Kielce University of Technology Faculty of Mechatronics and Machine Design Author: Ryszard Dindorf Kielce, 2011/2012 1. Fluid power basic

More information

Quiz On Information Learned From Chapter 1

Quiz On Information Learned From Chapter 1 Quiz On Information Learned From Chapter 1 1. Most hydraulic circuits are designed by: A. mechanical engineers. B. fluid power engineers. C. fluid power distributor salesmen. 2. Atmospheric pressure at

More information

Fluid Power Formula. These Formula Cover All Fluid Power Applications In This Manual

Fluid Power Formula. These Formula Cover All Fluid Power Applications In This Manual These Formula Cover All Fluid Power Applications In This Manual For Computer Programs To Work Problems By Simply Filling In The Blanks See Your Local Fluid Power Distributor Many Companies Web Site Or

More information

Equipment Options Advantages and Disadvantages ALABAMA NATURAL GAS ASSOCIATION. Darin L. Moore, P.E. Elster American Meter

Equipment Options Advantages and Disadvantages ALABAMA NATURAL GAS ASSOCIATION. Darin L. Moore, P.E. Elster American Meter Equipment Options Advantages and Disadvantages ALABAMA NATURAL GAS ASSOCIATION Darin L. Moore, P.E. Elster American Meter KNOWLEDGE, PLANNING AND IMPLEMENTING REDUCES RISK KNOW THE TYPES OF OVERPRESSURE

More information

Automatic load-dependent load sensing valve (LSV) LSV Application

Automatic load-dependent load sensing valve (LSV) LSV Application LSV 475 712 Application Purpose Maintenance LSV controller with integrated trailer brake valve for leaf-spring semitrailers (mainly in Italy, France and the UK) Control of the two-line trailer brake systems

More information

Hydraulic Pump/Motor Division. John Duba Product Manager Piston Pumps. Hydraulic Pump/Motor Division

Hydraulic Pump/Motor Division. John Duba Product Manager Piston Pumps. Hydraulic Pump/Motor Division John Duba Product Manager Piston Pumps Otsego Core Competency... Piston Pumps PAVC Series : 4 displacements from 33-100 cc/r, 207 Bar, 3000 RPM PVP Series : 9 displacements from 16-140 cc/r, 250 Bar, 3000

More information

Select the Right Relief Valve - Part 1 Saeid Rahimi

Select the Right Relief Valve - Part 1 Saeid Rahimi Select the Right Relief Valve - Part 1 Saeid Rahimi 8-Apr-01 Introduction Selecting a proper type of relief valve is an essential part of an overpressure protection system design. The selection process

More information

SD Bendix BP-1 Brake Proportioning Valves DESCRIPTION OF THE BP-1 VALVES OPERATION

SD Bendix BP-1 Brake Proportioning Valves DESCRIPTION OF THE BP-1 VALVES OPERATION SD-03-952 Bendix BP-1 Brake Proportioning Valves 1.5.340 MOUNTING HOLES (2) SUPPLY PORT PIECE NO. STAMPED HERE 1/8 P.T. CONTROL PORT I.D. TAG STAMPED BP-1 FRONT OR BP-1 REAR DELIVERY PORT FIGURE 1 BP-1

More information

SIMPLE HYDRAULIC SYSTEM. Understanding Mobile Hydraulics. Ram Handle. Reservoir Pump SYSTEM COMPONENTS. FORCE America Inc.

SIMPLE HYDRAULIC SYSTEM. Understanding Mobile Hydraulics. Ram Handle. Reservoir Pump SYSTEM COMPONENTS. FORCE America Inc. Understanding Mobile Hydraulics. SIMPLE HYDRAULIC SYSTEM Ram Handle SYSTEM COMPONENTS Reservoir Pump 1 COMPONENTS PRIME MOVERS Reservoirs Dissipate heat store fluid Strainer/filters Clean fluid Prime movers

More information

HPV Closed Loop Pump Data and Specifications

HPV Closed Loop Pump Data and Specifications Data and Specifications Specifications cm 3 /rev in 3 /rev Pressure Ratings Rated Speed Max Disp Rated Speed Min Disp Envelope Size: Length Width Height Weight HP Rating Count HPV 55 55 3.35 HPV 75 75

More information

Hydraulic control unit series 0086-372-01

Hydraulic control unit series 0086-372-01 Technical Product Information No. 1290 EN Hydraulic control unit series 0086-372-01 Contents Page About this Technical Product Information (TPI) 2 The ORTLINGHAUS numbering system 2 About the product 3

More information

Oildyne. 165 Series Hydraulic Power Units. Pressures to 241 bar (3500 psi) Flows to 5.4 lpm (1.4 gpm)

Oildyne. 165 Series Hydraulic Power Units. Pressures to 241 bar (3500 psi) Flows to 5.4 lpm (1.4 gpm) Oildyne Hydraulic Power Units Pressures to 241 bar (3500 psi) Flows to 5.4 lpm (1.4 gpm) 11 Power Unit Features We are pleased to introduce our new power units. The power units let you put more power where

More information

Check Valves Valve locator

Check Valves Valve locator Check Valves Valve locator Functional Symbol Flow Typical Model Cavity Rating Pressure Page Check valve, direct L/min (USgpm) bar (psi) FPR/4 Inline () 5 (5) - FPR/8 Inline (8) 5 (5) - FPR/ Inline 45 ()

More information

Air Inlet and Exhaust System

Air Inlet and Exhaust System SENR9703-05 15 i02363770 Air Inlet and Exhaust System SMCS Code: 1050 Illustration 12 Fill (A) Moving parts (B) Mechanical movement (C) Fuel movement. g00942802 When the plunger reaches the bottom of the

More information

*Rated to 207 Bar/3000 PSI with Aluminum Body. Denotes New Winner s Circle Product Line. Catalog HY15-3502/US

*Rated to 207 Bar/3000 PSI with Aluminum Body. Denotes New Winner s Circle Product Line. Catalog HY15-3502/US Bodies & Contents SERIES CAVITY DESCRIPTION FLOW PRESSURE PAGE NO. LPM/GPM BAR/PSI STANDARD CHECKS D1A6... 2U... Valve Insert, Ball Type...145/38... 42/6... 5 D1B125... 2C... Valve Insert, Ball Type...

More information

Hydraulics. Chapter 6

Hydraulics. Chapter 6 Chapter Hydraulics Specifications................................................................. -3 Test Specifications........................................................ -3 Repair Specifications.......................................................

More information

Hydraulic Troubleshooting PRESENTED BY

Hydraulic Troubleshooting PRESENTED BY Hydraulic Troubleshooting PRESENTED BY NORMAN KRONOWITZ Introduction Welcome to the CMA/Flodyne/Hydradyne s Hydraulic Troubleshooting presentation. We will introduce many aspects of troubleshooting hydraulic

More information

Pressure In A Fluid. GE Define fluid in your own words. 2. Is a liquid a fluid? Is a gas a fluid? Explain your reasoning.

Pressure In A Fluid. GE Define fluid in your own words. 2. Is a liquid a fluid? Is a gas a fluid? Explain your reasoning. HPP Activity 38v1 Pressure In A Fluid Note that this unit contains the word "fluid" in the title. Let us carry on by examining the relationship between pressure and fluids. Exploration GE 1. 1. Define

More information

Pilot-operated Check Valves ERVE. up to 350 bar up to 300 l/min. Cartridge valves E / Connection housings

Pilot-operated Check Valves ERVE. up to 350 bar up to 300 l/min. Cartridge valves E / Connection housings Pilot-operated Check Valves ERVE up to 350 bar up to 300 l/min Cartridge valves Connection housings 1. DESCRIPTION 1.1. GENERAL In accordance with DIN-ISO 1219, HYDAC pilot-operated check valves, type

More information

Contents. LWN 750.30 edition: 24.02.10 3-0

Contents. LWN 750.30 edition: 24.02.10 3-0 Contents 3.1 Introduction...3.1-1 3.2 List of Referenced Codes and Standards...3.2-1 3.3 Overview Terms and Definitions...3.3-1 3.4 Description Terms and Definitions...3.4-1 LWN 750.30 edition: 24.02.10

More information

Hydraulically pilot operated cartridge check valves Type RHC and RHCE without and with hydraulic pre-relief

Hydraulically pilot operated cartridge check valves Type RHC and RHCE without and with hydraulic pre-relief Hydraulically pilot operated cartridge check valves RHC and RHCE without and with hydraulic pre-relief Pressure p max = 700 bar Flow Q max = 0 lpm Symbols RHC RHCE 1. General These devices are designed

More information

THE BASICS OF PRESSURE REGULATORS

THE BASICS OF PRESSURE REGULATORS THE BASICS OF PRESSURE REGULATORS Contents The Basics of Pressure Regulators Material Fluid used (gas, liquid, toxic or flammable) Temperature Operating Pressures Flow Requirements Size & Weight Pressure

More information

Pressure Control Valves

Pressure Control Valves Catalog HY15-352/US Contents RELIEF VALVES Control SERIES CAVITY DESCRIPTION FLOW PRESSURE PAGE NO. LPM/GPM BAR/ DIRECT ACTING RDH42... C4-2... Direct Acting Relief, Poppet Type... 3.8/1... 35/5... 7-8

More information

Republic/Manatrol Hydraulic and Pneumatic Control Valves. Catalog HY /US FOR POSITION ONLY

Republic/Manatrol Hydraulic and Pneumatic Control Valves. Catalog HY /US FOR POSITION ONLY Republic/Manatrol Hydraulic and Pneumatic Control Valves Catalog HY14-3000/US FOR POSITION ONLY Republic/Manatrol Valves Hydraulic and Pneumatic Controls WARNING FAILUR OR IMPROPR SLCTION OR IMPROPR US

More information

Pressure relief valve, pilot-operated, with pulling function, seat design with pressure sequencing and pressure cut-off stage

Pressure relief valve, pilot-operated, with pulling function, seat design with pressure sequencing and pressure cut-off stage Pressure relief valve, pilot-operated, with pulling function, seat design with pressure sequencing and pressure cut-off stage Type MHDBB and MHDBL RE 6461 Edition: 016-04 Frame sizes 16,, 3 Component series

More information

Hydraulic Flow Control Valves

Hydraulic Flow Control Valves Webtec Products Limited Hydraulic Flow Control Valves Quality Hydraulic Components from the Webtec Range CONTENTS DESCRIPTION PAGE No. ILFC Series Fixed Flow Pressure Compensated Control Valve 1 VFC Series

More information

POLICY BULLETIN Tecumseh Compressor Company Compressor Group

POLICY BULLETIN Tecumseh Compressor Company Compressor Group to Bulk Milk Coolers and Other System Page 1 of 5 Overall reliability can be enhanced if there exists a complete understanding of the features, system design, installation requirements, processing, charging

More information

Performance Analysis of a. for a Diesel Engine

Performance Analysis of a. for a Diesel Engine 12 th GT-Suite User s Conference Performance Analysis of a Decompression Brake System for a Diesel Engine Ivan Miguel Trindade Vinicius J. M. Peixoto MWM International Motores November, 10th 2008 Presentation

More information

THE 26-L BRAKE EQUIPMENT

THE 26-L BRAKE EQUIPMENT INSTRUCTION PAMPHLET No. 74 June 1964 THE 26-L BRAKE EQUIPMENT with 26-C BRAKE VALVE and 26-F CONTROL VALVE arranged for SAFETY CONTROL OVERSPEED CONTROL DYNAMIC INTERLOCK and MULTIPLE-UNIT CONTROL for

More information

ACCUMULATOR INSTALLATION

ACCUMULATOR INSTALLATION 7001-7 ACCUMULATOR INSTALLATION BRAKE ACCUMULATORS I 308L93 Rae 7-59710 Issued 6-93 Printed in U.S.A 7001-8 Removal ACCUMULATOR VALVE 1. Park the machine on a level surface and lower the. loader bucket

More information

Using Pneumatic Cylinders in Rivet, Hole Punch & Broaching applications

Using Pneumatic Cylinders in Rivet, Hole Punch & Broaching applications How to control pneumatic cylinder forces Using Pneumatic Cylinders in Rivet, Hole Punch & Broaching applications Begin with force-multiplying Pneumatic Cylinders Multi-Power Air Cylinders from Fabco-Air

More information

Technical Memo. Theory Of Operation OVERVIEW ACTUATOR

Technical Memo. Theory Of Operation OVERVIEW ACTUATOR Electraulic Actuators & Drives Theory Of Operation Technical Memo REXA 4 Manley Street W. Bridgewater, MA 02379 Tel: 508.584.1199 Fax: 508.584.2525 OVERVIEW The REXA Xpac is a microprocessor controlled,

More information

Hydraulic Pressure Control Valves

Hydraulic Pressure Control Valves Webtec Products Limited Hydraulic Control Valves Quality Hydraulic Components from the Webtec Range CONTENTS DESCRIPTION PAGE No. RV 020 Direct In-Line Relief Valve 1 RV 025 Relief Valve 3 RV 050 Relief

More information

Hydroforming. Training Objective

Hydroforming. Training Objective Training Objective After watching the video and reviewing this printed material, the viewer will gain knowledge and understanding of the hydroforming process and its use in manufacturing sheet metal parts.

More information

System Saver 318 Air Compressor for Mack E-Tech and ASET Engines

System Saver 318 Air Compressor for Mack E-Tech and ASET Engines Maintenance Manual 31 System Saver 318 Air Compressor for Mack E-Tech and ASET Engines Revised 08-05 NON-THROUGH DRIVE THROUGH DRIVE Service Notes About This Manual This manual provides service and repair

More information

FUNDAMENTAL PRINCIPLES OF DIAPHRAGM METERS. Robert Bennett American Meter Company

FUNDAMENTAL PRINCIPLES OF DIAPHRAGM METERS. Robert Bennett American Meter Company FUNDAMENTAL PRINCIPLES OF DIAPHRAGM METERS Robert Bennett American Meter Company INTRODUCTION The first gas company in the U.S., The Gas Light Company of Baltimore, Maryland, founded in 1816, struggled

More information

OPERATION AND TROUBLESHOOTING GUIDE 12 & 24 volt DC power units. Distributed by :

OPERATION AND TROUBLESHOOTING GUIDE 12 & 24 volt DC power units. Distributed by : OPERATION AND TROUBLESHOOTING GUIDE 12 & 24 volt DC power units Distributed by : Revision 1.0-2013 IMPORTANT Thank you for purchasing this brand new Eagle Hydraulic Components power pack! Before you start

More information