How To Repair A 000 Series Regulator

Transcription

1 Installation, Operation and Maintenance Manual for Blanket Gas Regulator Series 000 ISO 900 Groth Corporation 99 IOM JULY 99 IOM REV. A

2 TABLE OF CONTENTS SECTION DESCRIPTION PAGE NO. A MAIN SECTION INTRODUCTION GENERAL INFORMATION SAFETY INSTALLATION OPERATION & MAINTENANCE DRAWINGS & BILL OF MATERIAL B No C No. 8 9 Regulator Design, Function & Operation Regulator Function - Flowing/Shut-off Condition General Instructions Inspection & Installation Operation: Pressure Setting Operation: Flow Capacity Setting Blanketing the Tank Recommended Spare Parts Troubleshooting Guide Preventive Maintenance & Disassembly Assembly Recommended Testing & Setting Procedure Exploded View - Drawing Bill of Material Cross-Sectional - Drawing Model Identification & Product Limited Warranty LIST OF FIGURES* DESCRIPTION Tank Installation - Safety Equipment Regulator Function - Flowing Condition Regulator Function - Shut-off Condition Blanketing Regulator Installation Orifice Sleeve Orientation Spring Bonnet Assembly Piston/Body Assembly Piston Assembly - "Exploded" Orifice Sleeve Orientation Orifice Sleeve Orientation Piston Assembly - "Exploded" Piston/Body/ Diaphragm Assembly Spring Bonnet Assembly Blanketing Regulator - "Exploded" Assembly Blanketing Regulator - Cross-Sectional Assembly LIST OF TABLES DESCRIPTION 000 Series Regulator Specifications Flow Capacity Model 000 Spring Table Model 00 Spring Table Model 00 Spring Table Orifice Selection Recommended Spare Parts Recommended Bolt Torque Bill of Material Series Regulator IOM REV. A

3 *Note: Some Figures are duplicated for the convenience of the reader INTRODUCTION The gas blanketing regulator is one of the principal components typically installed on a storage tank to protect the tank and its contents. It is a precision regulator that is capable of maintaining a very low gas pressure (/" minimum) in the tank by controlling the flow of a high pressure (00 maximum) blanketing gas. It maintains a positive tank pressure when fluid is pumped out or as fluid temperature decreases. Typically nitrogen or another compatible gas is used to displace the tank product vapors. This reduces product evaporation and prevents atmospheric contaminants, including moisture, from entering the tank, minimizing internal tank corrosion and product contamination. The use of inert blanketing gas minimizes air pollution due to leakage or emergency venting. In addition to the blanketing regulator, a tank must be protected from structural damage by pressure and vacuum relief valves. A typical tank installation is shown in Figure which includes the regulator, a pressure vacuum relief valve and an emergency pressure relief valve. Groth Corporation manufacturers all of these devices. The regulator must be carefully maintained by a knowledgeable valve technician. It should only be assembled under clean conditions, preferably in a shop environment. Carefully read and understand this manual before attempting to adjust set pressure or flow capacity, or repair the regulator. Groth Corporation offers repair services for all products manufactured by the Tank Protection Division. Figure : Tank Installation - Safety Equipment PREURE/VACUUM RELIEF VALVE GROTH MODEL 0 GAS BLANKET REGULATOR GROTH MODEL 000 EMERGENCY RELIEF VALVE GROTH MODEL 00 GAUGE BLANKET GAS SUPPLY SENSE LINE IOM REV. A

4 REGULATOR DESIGN, FUNCTION & OPERATION The Groth Model 000 Regulator is a high capacity spring operated, diaphragm type, balanced piston regulator design for tank blanketing applications. The regulator controls the flow of blanketing gas to the vapor space in the storage tank. When the internal pressure of the tank is at or above set pressure, the diaphragm force exceeds the spring force and the regulator is shut off bubble tight. When the tank pressure falls below the set point, the spring force opens the regulator and blanket gas flows into the tank (See Figures and ). The regulator must be sized to provide sufficient blanket gas to prevent the loss of tank pressure due to liquid discharge or decreased ambient temperature. Table lists the maximum flow capacity of the regulator for various blanketing gases. Actual system flow will depend on supply system piping, tank connection piping and position of the internal orifice sleeve. Set pressure is the pressure at which the regulator begins flowing when tank pressure is decreasing and stops flowing when tank pressure is increasing. This manual is intended to provide recommended procedures and practices for installation, operation, and maintenance of the Groth Series 000 Regulator. Any standard procedures and practices developed in a specific plant or process should supersede this manual. Although this manual cannot cover all possible contingencies, following these guidelines should provide safe regulator performance. For information not contained in this manual, please contact: Groth Corporation Groth Products Group P. O. Box 9 Houston, TX (phone) --9 (fax) Note that throughout this manual, the item numbering is listed in [ ] after the part description. Refer to the exploded assembly drawing on page and the parts list on page. Flow Coefficient (CV) Inlet/Outlet TABLE REGULATOR SPECIFICATIONS " NPT (F) or "0# RF Flange " NPT (F) or " 0# RF Flange " NPT (F) or " 0# RF Flange Supply Pressure Tank Pressure Max. Tank MAWP Supply Pressure " to /" to to.0 " 0 0 " 0 TABLE FLOW CAPACITY * 000 SERIES REGULATOR SCFH Nitrogen Natural Gas 0. G Air *Internal orifice sleeve installed in 00% flow capacity position.

5 Figure : Regulator Function - Flowing Condition VENT INLET OUTLET HIGH PREURE BLANKETING GAS HIGH PREURE BLANKETING GAS VENT SENSE PORT LOW PREURE PROCE VAPOR Figure : Regulator Function - Shut-off Condition INLET OUTLET LOW PREURE PROCE VAPOR HIGH PREURE BLANKETING GAS VENT SENSE PORT LOW PREURE PROCE VAPOR

6 SAFETY GENERAL INSTRUCTIONS This section is intended as an overview of safety guidelines that should be followed during the installation, operation and maintenance of Groth Series 000 Gas Blanketing Regulator. To understand the context of these warnings and instructions, read and understand this complete manual. The gas blanketing regulator is one of the principal protection devices typically installed on a product storage tank. It is a precision regulator that is designed to maintain a positive pressure on the tank. This will prevent product loss or contamination from atmospheric air when pumping liquid out or when the stored fluid cools. WARNING. In the event of an actuator or body diaphragm failure, the regulator will fail in the OPEN position. Gas flow will NOT be shut off. Operating and emergency pressure relief valves must be sized to flow regulator capacity in addition to normal and emergency venting requirements.. Gas Blanket Regulator flow capacity is based on tests conducted with five feet of " SCH. 0 discharge piping. Consult factory for capacity data if regulator is to be installed with longer pipe or numerous fittings or valves between the regulator and the tank it is blanketing.. The regulator is normally factory set at the desired set pressure and orifice restriction. These settings and spring range are stamped on the nameplate. DO NOT attempt to readjust the set pressure beyond the limits specified in Tables, and.. The regulator is to be connected to the tank or vessel with a minimum 0.00" ID tubing sense line. This line must be kept open and unobstructed to ensure that the regulator "senses" the actual tank pressure. For some applications, a nitrogen purge may be required to ensure that this line remains open. Consult factory for recommendations.. DO NOT attempt to remove the regulator from the line or perform field repairs in line without first isolating the regulator from both the tank and the supply gas line. Bleed all pressure before removing the spring bonnet or the flow orifice locking screw, or opening up the actuator cases.. Note the orifice sleeve position when disassembling the regulator. It was factory set according to the flow requirements listed on the order and must be re-installed in the same position to ensure the correct flow.. The regulator body and actuator case are exposed to process vapors. Observe all safety precaution as specified on the Material Safety Data Sheet for the products that are in the tank. 8. The vents on the spring bonnet and upper case must both be clean and open to the atmosphere and should be inspected periodically.

7 INSPECTION AND INSTALLATION The regulator is packaged and supported to prevent damage or contamination in shipping. It should be similarly protected during subsequent handling and storage. Always keep all ports plugged to prevent intrusion of foreign materials. Before installation, inspect the unit visually. If there are indications of physical damage or internal contamination, the regulator must be disassembled, cleaned and inspected before installation. If factory set, the spring adjustment cap and the orifice selector locking screw must be secure. Report any shipping damage to your carrier. The regulator inlet and outlet connections are " NPT (F) or " 0# RF ANSI flange. The regulator must be installed level, the direction of the flow is marked on the body. It is to be installed in accordance with accepted piping practices. Full bore block valves should be installed upstream and downstream of the regulator and in the sense line to allow it to be removed from the system for maintenance. The regulator discharge line must be as short as possible to obtain the rated gas flow rate. It is not recommended to exceed a ' length of " SCH 0 pipe. Consult with the factory for piping recommendations if it is necessary to install the regulator a greater distance from the tank. The supply line must be capable of providing the rated flow at the minimum supply pressure. The sense line should be minimum 00" ID tubing and is to be connected to the tank at least " from the regulator discharge line (See. Figure ). WARNING Regulator flow capacity listed in Table is based on tests with ' of " SCH. 0 discharge pipe and a " supply hose reduced to " pipe at regulator supply port. Depending on discharge line size, length and number of fittings, regulator flow capacity may be less than published curves. Supply and discharge piping should be designed to minimize losses at desired flow condition. Consult factory for nonstandard installation regarding flow capacity. Figure : Blanketing Regulator Installation BLOCK VALVE-" MIN FULL BORE BLANKET GAS SUPPLY () () SENSE LINE BLOCK VALVE-/" MIN FULL BORE DISCHARGE PIPING ' MAX LENGTH TANK PREURE GAUGE TANK ROOF () " MIN

8 OPERATION PREURE SETTING The regulator may be set at the factory or on the tank or vessel when initially introducing blanketing gas. A pressure gauge (or manometer) is required to show the tank pressure. Set pressure is adjusted by removing the valve cap [] and rotating the adjusting screw []. Back off the jam nut [] and turn the screw clockwise (tighten) to increase set pressure. The Model 000 Regulator covers a range of set pressures from " to.0, using () different springs. The model 00 is required for set pressures from /" to ", and model 00 from.0 to 0.0. In some cases, different actuator components are also required, either to reduce the weight for low settings or to withstand the forces due to higher pressure. (See. Tables, and ). The set pressure range with the original spring is stamped on the valve nameplate. The regulator will not function properly if the setting is not within this range. If higher or lower settings are required, the necessary components can be obtained from Groth Corporation. They must be installed according to instruction in the maintenance section of this manual. Tables, and show standard set pressure ranges. Spring Range TABLE SPRING TABLE MODEL 000 TANK BLANKETING REGULATOR MEDIUM PREURE RANGE SET PREURE RANGE: " -.0 G Min. Max. Spring Support Back-up Setting Setting P/N Plate Plate.0"."."."." 0.9" (Yellow) (Green) (Pink) Tank MAWP Spring Range TABLE SPRING TABLE MODEL 00 TANK BLANKETING REGULATOR LOW PREURE RANGE SET PREURE RANGE: 0." -.0" Min. Max. Spring Support Back-up Tank Settin Setting P/N Plate Plate MAWP g 0." 0."." 0.".0".0" (Red) (Yellow) (Green) " 0" 0".0" 8." (Blue) ".00.8." (White) (Gray) (Black) TABLE SPRING TABLE MODEL 00 TANK BLANKETING REGULATOR HIGH PREURE RANGE WARNING Spring Range SET PREURE RANGE: G Min. Max. Spring Support Back-up Setting Setting P/N Plate Plate Tank MAWP The recommended set pressure range of the regulator spring is stamped on the nameplate. Never adjust a spring for a set pressure above its upper design limit as specified in Tables, and. Exceeding the spring rang may compress the spring to its solid height. If this happens the regulator may not close and the tank could be over-pressured if the relief valve capacity is less than supply gas flow rate (Green) (Pink) (Blue) (White) N/A N/A N/A N/A

9 FLOW CAPACITY SETTING Unless otherwise specified, the orifice selector sleeve [] is factory set at the 00% full open position. If reduced capacity is specified on an order, the sleeve is set at the appropriate restriction. Actual capacity at any other position can be calculated by multiplying the capacity value from Table for a specific pressure by the decimal fraction from Table. Flow capacity can be adjusted by rotating the orifice sleeve (See Warning). It has a series of indexing holes, four of which are marked with the numbers - -- (See Figure ). Two unmarked holes are used to assist when rotating the sleeve. Adjustment can be made by loosening and backing the lockdown screw completely out of the body. The sleeve position can then be viewed and the sleeve rotated by inserting a small diameter wire into the holes. WARNING The adjustable orifice is located in a pressure containing chamber. Close the supply valve and release all pressure before making adjustments. When replacing the locking screw, grease the O-Ring [] and slip it over the screw threads. Thread the screw [] into the body, finger tight, until the point enters the sleeve and the head seats onto the O-Ring. Then wrench tighten the head firmly against the body, compressing the O-Ring. Sleeve position and valve capacity are shown in Tables and. These tables are based on the supply pressure at the regulator inlet and piping as recommended in the installation section. Figure : Orifice Sleeve Orientation WARNING The regulator orifice sleeve is factory set at the specified flow capacity. When repairing a regulator, note the position of the indexing holes at disassembly. The sleeve must be re-assembled in the same position to ensure the proper flow capacity. NEVER adjust the orifice sleeve position without written instructions from your plant operations group. TABLE ORIFICE CAPACITY Orifice Sleeve Position Flow Multiplier

10 BLANKETING THE TANK Before installing a new or replacement regulator, the tank pressure must be below the desired set pressure so the regulator setting can be verified. Sequentially open the block valves in the following order: () Sense Line, () Regulator Discharge Line and () Regulator Supply (See Figure. ). If the regulator was set at the factory, blanket gas will begin to flow immediately. The tank pressure must be monitored closely to verify that the gas flow shuts off within the specified limit above set pressure. If the regulator was not set at the factory, make sure that the adjusting screw [] is backed out as far as possible (no spring compression). When the blanket gas supply valve is turned on, there will be no flow, unless the tank pressure is very low. Now slowly turn the adjusting screw to increase tank pressure and the gas will begin to flow. The tank pressure can be increased as gradually as desired until the correct pressure setting is attained. When tank pressure is reached, back out adjusting screw, if necessary, until gas flow stops. WARNING When adjusting the regulator on the tank, always be sure that the sense line is open and unobstructed. Monitor the tank pressure accurately. WARNING In the event of actuator diaphragm [] or piston diaphragm [] failure, the regulator will fail in the OPEN position. Under this condition gas flow will NOT be shut off by the regulator. The tank pressure relief valve(s) must be sized to relieve the condition of full regulator capacity, pump in rate; and thermal expansion due to temperature rise. In the event of blanket supply gas failure, the regulator will NOT protect the tank from collapse due to a vacuum condition. The operating relief valve should include a vacuum breaker set according to the tank's design vacuum capacity. RECOMMENDED SPARE PARTS When ordering spare parts, include model and serial number of regulator, pressure setting, and required material for soft goods. TABLE RECOMMENDED SPARE PARTS ITEM DESCRIPTION QUANTITY Diaphragm, Actuator Diaphragm, Piston O-Ring, Piston O-Ring, Guide Ring O-Ring, Locking Screw Spring Vent, Case Vent, Bonnet 9 Gasket, Actuator

11 TROUBLESHOOTING GUIDE PROBLEM INSPECTION SUGGESTED CORRECTIVE ACTION Gas flowing at tank pressure above specified set point. Gas not flowing at tank pressure below specified set point. Gas leaking from upper vent or bonnet flange. Gas leaking from lower body seal or case vent. Process vapor leaks from case flange or vent. Tank pressure above or below specified operating range during pump out or pump in. Tank pressure or vacuum exceeds vent settings during pump out or pump in. Flow indicator in blanket gas line. Flow indicator in blanket gas line. Soap bubble test and joining surface or emission indication near vent. Soap bubble test at joining surface or emission indication near vent. Soap bubble test at joining surface or emission indication near vent. Observe tank pressure indicator during pumping operations. Observe tank pressure indicator during pumping operations. Damaged seat, O-Ring or diaphragm or pressure setting too high. If original pressure setting has not been disturbed, remove regulator and repair. Damaged spring or pressure setting too low. If original pressure setting has not been disturbed, remove regulator and repair. Damaged upper piston diaphragm. Remove regulator from tank and replace diaphragm. Diaphragm installed incorrectly. Reinforcement fabric must be opposite to pressure (see page ). Damaged lower piston diaphragm. Remove regulator from tank and replace diaphragm. Diaphragm installed incorrectly. Reinforcement fabric must be opposite to pressure (see page ). Damaged actuator diaphragm or loose case bolts. Tighten bolts or remove regulator from tank and replace diaphragm. Excess or insufficient blanket gas flow. Check flow orifice orientation. Refer to Tables & for flow capacity data. Check gas supply pressure. Remove and repair regulator if other conditions are correct. Pressure/vacuum relief vent not functioning properly. Inspect and repair or replace as necessary. 8

12 Figure : Spring Bonnet Assembly fixture and provides some degree of rotation while working on the regulator. WARNING WARNING Diaphragm actuator case and regulator body are exposed to the process vapor(s). Observe all standard safety precautions as specified on Material Safety Data Sheets for the product(s) that are in the tank. These precautions apply both during removal of the regulator from the tank and while repairing it. Before removing the regulator from the tank for service, block supply pressure and vent all trapped pressure. Never attempt to remove the regulator from the line if it is pressurized. WARNING 8 9 Do NOT attempt to remove the spring chamber [], flow orifice locking screw [], or any pipe connections from the body [0], while the regulator is pressurized. Remove the adjustment screw cap [] and loosen the jam nut []. Turn the adjustment screw [] counterclockwise to completely relax the spring []. Remove the cap screws [8] and the lock washers [9]. Remove the spring bonnet []. Remove the spring upper button [], the spring [], the lower spring button [] and then the bonnet adapter ring [0]. Use a /8" open end wrench and insert it through the inlet port to hold onto the piston [] at the wrench flats. Remove the upper piston pin [8] while holding onto the piston. Be careful not to let the piston rotate during removal of the upper piston pin. The piston diaphragms [] can easily be torn if care is not taken. Figure : Piston/Body Assembly PREVENTIVE MAINTENANCE Periodically, while in service, examine the regulator for leakage at bolted connection, adjusting screws, etc. Test for blanket gas or process vapor emissions from vent caps DISAEMBLY All service on the regulator may be performed with the following common tools: /" thru " box end wrenches /8" open end wrench* /" Allen key WRENCH FLATS *Wrench must be " long for flanged units. Thread a /" pipe nipple into the sense port on the lower diaphragm case []. Use a vise and clamp onto the pipe nipple. This makes a good holding Remove the upper diaphragm retainer [9] and the upper piston diaphragm []. 9

13 Remove the hex nuts, lockwashers, and hex bolts (items 8,, & respectively). Remove the upper diaphragm case assembly [] straight up. Loosen the vise and remove the lower diaphragm case with the pipe nipple still intact. Turn the upper diaphragm case assembly upside down and use a vise to hold on to the body [0]. Insert the /8" open end wrench through the inlet port and hold on to the piston at the wrench flats while loosening the countersunk screw [] (See Figure ). Remove the lift stop ring [] from the groove by expanding the ring slightly; and slide it over the piston with care. Do not overexpand the ring. Remove the retaining ring [] with retaining ring pliers. Expand retaining ring just enough to slide over the piston. Be careful not to scratch the piston surface. Remove the O-Ring retainer [] and the o- ring []. Figure 9: Orifice Sleeve Orientation Figure 8: Piston Assembly - "Exploded" Remove the washer [8], the diaphragm [], the diaphragm support plate [] and then the back-up plate [9]. Use a /" Allen hex key and remove the countersunk screws [0]. Remove the upper diaphragm case []. Lift the piston sub-assembly [] straight up and remove from the body for disassembly. Lay the piston subassembly horizontally on a clean flat surface. Hold the piston at the wrench flats and remove the lower pin [], the diaphragm retainer [9], the diaphragm [], the O-Ring [] and then the guide ring []. Refer to "FLOW CAPACITY SETTING" and warnings before disassembling lockdown screw [] from body. Loosen and screw the lock down screw [] completely out of the Body. Before removing the orifice selector sleeve [], make note of its position by looking through the /" lock down screw port. There will be a number stenciled on the sleeve indicating the position of the sleeve. Note this number for re-assembly. Refer to Tables & to determine flow capacity of the regulator at a specific open position. All components should be examined for damage or wear. Replace all seals and diaphragms. Prior to reassembly, make sure all components are clean and free of contamination. Remove the piston sub-assembly from the body. 0

14 AEMBLY Before assembly note the following material and tool requirements:. Diaphragms, O-Rings, gasket, vents and spring as listed in Table : Recommended Spare Parts on page 8.. Lubricants & Thread Sealants A. Silicone Grease Dow Corning No. B. Anti-Galling Lubricant Dow Corning G-N Metal Assembly Spray C. Thread Sealant Loctite Threadlocker No. D. Fluoropolymer tape. Assembly Tools A. /" - " box end wrenches B. /8" open end wrench* C. /" Allen key * Wrench must be " long for flanged units. All screw threads and static O-Ring should be lightly greased with silicone grease. Lubricate the piston OD at both ends and the spring adjusting screw with an anti-galling spray. If the greases listed above are not compatible with the tank vapors, use equivalent lubricants for that media. All pipe threads are to be wrapped with Fluoropolymer tape or suitable pipe thread sealant applied sparingly. Before installing the orifice selector sleeve, read the section entitled "FLOW CAPACITY SETTING" and related warnings on page. Install the orifice selector sleeve [] into the regulator body. Observe the sleeve position locking hole by looking in the locking screw hole in the body. The hole in the sleeve should be exactly centered in the screw hole. If the holes do not line up exactly, invert the sleeve and reinstall. The position indicating numbers will also be seen through the screw hole. These numbers indicate % open and flow capacity according to Tables and. Make sure that the sleeve position is on the same number as when disassembled, or on the number that provides the specified flow requirements. Figure 0: Orifice Sleeve Orientation Grease the locking screw O-ring [] and slip it over the screw threads. Thread the locking screw [] into the body, finger tight, until the point enters the sleeve and the head seats onto the O-ring. Then wrench tighten the head firmly against the body, compressing the O-ring. Note: Damage to the sleeve will occur if force is applied with the point of the locking screw. Figure : Piston Assembly - "Exploded" Assemble the piston sub-assembly according to Figure. Install the O-Ring [] from the top end of the piston. Do not rotate the o-ring, but stretch it just enough to clear the piston diameter. When installing the retaining ring [], snap ring [] and lift stop ring [] expand the rings just enough to

15 clear the piston without scratching the piston or permanently deforming the rings. Secure the body in a vise with the bottom surface facing upward and the inlet port accessible (See Figure ). Spray the piston sub-assembly with an anti-galling lubricant and insert it and the guide ring [], into the body. Install the body O-Ring []. Set the piston diaphragm into the upper actuator housing with reinforcing fabric away from the piston (opposite to the supply pressure). Refer to Figure. Attach the upper diaphragm case [] to the body, being sure that the piston wrench flats are accessible through the inlet port before tightening the countersunk screws [0]. Clean all surfaces before assembly and tighten bolts uniformly; refer to Table 8 for recommended torque. Reposition the assembly in the vise. Install the upper piston diaphragm [], retainer [9] and pin [8]. Hold piston with /8" wrench through inlet port while tightening pin. Install the bonnet adapter ring [0], spring [], spring buttons [] and spring bonnet []. Attach bonnet to body with hex bolts [8] and lockwashers [9]. Tighten bolts uniformly; refer to Table 8 for recommended torque. Figure : Spring Bonnet Assembly Figure : Piston/Body/Diaphragm WRENCH FLATS Thread set pressure adjusting screw [] into bonnet until it engages the upper spring button. Tighten lock nut [] and replace cap []. Attach the sense diaphragm [], support plate [], back-up plate [9] and washer [8] (See Figure ). Clean thread surfaces thoroughly and apply Loctite Threadlocker No. to countersunk screw []. Align diaphragm and case holes and hold piston with a /8" wrench through inlet port while tightening the countersunk screw []. Attach the gasket [9] and lower diaphragm case [] with hex bolts, lockwashers and nuts [,, & 8]. TABLE 8 RECOMMENDED BOLT TORQUE [FT. - LB.] Note: See Recommended Testing and Setting Procedure. WARNING Replace bonnet vent [] or case vent [] if damaged or restricted. A plugged case vent could prevent the regulator from closing. This could cause an over-pressure condition in the tank. A plugged bonnet vent would prevent the release of supply pressure from the bonnet. This could cause personal injury when disassembling. Screw Size /" /" /8" /" /" Torque 0

16 .0) Equipment RECOMMENDED TESTING AND SETTING PROCEDURE outlet valve and reduce the supply until a minimum audible flow is observed..) A high pressure air (or inert gas) supply system capable of maintaining supply pressure at Flow may be controlled by a reducing regulator or valve..) A low pressure air (gas) supply system capable of maintaining sense pressure at /" to 0. Pressure may be controlled by a regulator or needle valve and a small accumulator. If a needle valve is used, it will require frequent adjustment because the regulator consumes a significant volume of air when operating..) A means of indicating or measuring air flow with a capacity of approximately 0 SCFH..) A means of soap bubble shell testing the assembly..0) Test procedure and Acceptance Criteria..) Connect the high pressure air supply to the regulator inlet port..) Connect the low pressure air supply to the regulator sense port..) Connect a reduced size manual shut-off valve to the outlet port..) Connect a small diameter hose or plastic tube to the inlet of the flow indicator or flow meter. Use a hand held port cover to attach the flow meter to the regulator outlet port. Never connect the flow meter rigidly to the regulator unless the flow meter is rated for full air supply pressure..) Connect a small diameter hose or plastic tube to the outlet of the flow indicating device so the end may be immersed in a container of water..) Close the outlet valve and set the supply air pressure to the maximum available, but not greater than 00. Soap bubble test the entire assembly at this pressure. Open the.) Adjust the sense pressure to the specified regulator set pressure. Adjust the regulator screw to shut off (no audible flow). Now increase the sense pressure to times the specified set pressure or. times the specified tank MAWP, whichever is greater. Soap bubble test the actuator housing..8) Increase the supply pressure to the specified system pressure (00 if not specified)..9) Slowly decrease the sense pressure and adjust the regulator screw until the air flow is -0 SCFH at the specified setting. Lock the adjusting screw at this setting..0) While immersing the outlet tube in water, increase the sense pressure until the regulator is bubble tight. If this pressure exceeds % or " greater than the set pressure, examine the seat and O-Ring. Do not adjust the regulator screw to improve bubble tightness..) Remove the bonnet vent. Shut off the supply pressure. Slowly decrease the sense pressure to zero, while observing the stroke of the piston thru the bonnet vent port. The stroke must be 0.8" minimum. Replace the bonnet vent..0) Test report data..) The following data should be recorded for future reference: Model, Tag & Serial numbers Test media Body & Actuator shell test pressure Supply pressure Set pressure Bubble tight pressure

17 Figure : Blanketing Regulator - "Exploded" Assembly PISTON SUB-AY BODY & SPRING BONNET AY 8 ACTUATOR & PISTON AY

18 TABLE 9 BILL OF MATERIAL 000 SERIES BLANKET GAS REGULATOR MATERIALS OF CONSTRUCTION ITEM QTY DESCRIPTION CARBON STEEL STAINLE STEEL Cap, Adjustment Screw Screw, Pressure Adjustment Nut, Hex Bonnet, Spring Button, Spring Spring Vent, Bonnet Pin, Upper Piston Retainer, Diaphragm Adapter, Bonnet Vent, Case Case, Upper Actuator Plate, Diaphragm Support Diaphragm, Actuator Case, Lower Actuator Bolt, Hex Washer, Lock Nut, Hex Plate, Back-Up Body Diaphragm, Piston O-Ring, Guide Ring Ring, Guide - Piston Piston O-Ring, Piston Seat Pin, Lower Piston Nameplate Bolt, Hex Washer, Lock Screw, Flathead Retainer, O-Ring Piston Seat Retaining Ring Stop, Lift Sleeve, Orifice Selector O-Ring, Lockdown Screw Screw, Locking - Flow Orifice Screw, Flathead Washer, Countersunk Gasket, Actuator CS CS CS PVC or Alum CS PVC or Alum CS Fluoropolymer CS BUNA-N BUNA-N BUNA-N BUNA-N Non-Asbestos PVC or Alum PVC or Alum Fluoropolymer FKM FKM FKM FKM Non-Asbestos

19 Figure : Blanketing Regulator - Cross-Sectional Assembly 8 9 REF TOP VIEW SHOWS TRUE ORIENTATION PISTON DETAIL INLET 0 OUTLET SENSE PORT

20 The nameplate on the Groth Series 000 Tank Blanketing Regulator contains the model number, serial number, set pressure & range and supply pressure. The model number contains additional information about material of construction, capacity and options. The following chart will assist in relating the model number to the specifications of your regulator: 000 N V O Connections Material Soft Goods Orifice Options " NPT (F) Carbon Stl 0 None "0# RF Z Special Special Z Special N F Z Model 000 " to Pressure Range Model 00 /" to " Pressure Range Model 00 to 0 Pressure Range B V E Z Buna-N FKM EPDM Special A "Z" in the model number indicates a non-standard material or feature. Review your purchase specifications or consult Groth Corporation for more details. 00% % 0% % EXAMPLE 000 N V 0 Indicates a 000 Series Regulator with Set Pressure Range from " -, " NPT Body Connections, Construction, FKM Elastomers, Full Capacity Orifice and No Special Requirements. PRODUCT LIMITED WARRANTY A. Seller warrants that products which are manufactured by Seller, are manufactured in accordance with published specifications and free from defects in materials and/or workmanship for a period of () twelve months. Seller, at its option, will repair or replace any products returned intact to the factory, transportation charges prepaid, which Seller, upon inspection, shall determine to be defective in material and/or workmanship. The foregoing shall constitute the sole remedy for any breach of Seller's warranty. B. THERE ARE NO UNDERSTANDINGS, AGREEMENTS, REPRESENTATIONS, OR WARRANTIES, EXPRE OR IMPLIED, (INCLUDING MERCHANTABILITY OR FITNE FOR A PARTICULAR PURPOSE REGARDING PRODUCTS) UNLE SPECIFIED IN THE SALES CONTRACT. THIS CONTRACT STATES THE ENTIRE OBLIGATION OF SELLER. Seller makes no warranties, either express or implied, except as provided herein, including without limitation thereof, warranties as to marketability, merchantability, for a particular purpose or use, or against infringement of any patent of products. In no event shall Seller be liable for any direct, incidental or consequential damages of any nature, or losses or expenses resulting from any defective new product or the use of any such product, including any damages for loss of time, inconvenience, or loss of use of any such product. C. The original Manufacturer shall be solely responsible for the design, development, supply, production, and performance of its products hereunder, and the protection of its trade name or names, if any. It assumes no responsibility, for products modified or changed in any way by its agent or customer. Any such modifications or changes to products sold by Seller hereunder shall make the product limited warranty null and void. D. The Manufacturer shall be under no obligation to manufacture, sell, or supply, or to continue to manufacture, sell or supply any of the Products.

21 ADDENDUM A Groth Corporation continually reviews and revises designs and specifications to improve quality and performance of its manufactured products. The specifications and procedures in this addendum supersede the applicable sections of the Spring Min. Range Setting.0 In. In. In.0 In 8. In.0.8 TABLE Spring Table Model 000 Set Pressure Range: " to.0 Tank MAWP: Max. Setting. In. In 0.9 In 8. In. In..0 TABLE Spring Table Model 00 Spring P/N Yellow Green Pink Blue White Gray Black Set Pressure Range: 0." to.0" Tank MAWP: 0 In Spring Min. Range Setting 8 0. In 0. In. In Spring Range Max. Setting 0. In.0 In.0 In TABLE Spring Table Model 00 Spring P/N Red Yellow Green Set Pressure Range:.0 to 0.0 Tank MAWP: Standard 0 Optional Min. Setting Max. Setting Spring P/N Blue White Gray Green Balance Spr P/N 8900 Yellow Not Required Not Required Not Required Not Required Not Required Not Required Balance Spr P/N 8900 Yellow 8900 Yellow Not Required Balance Spr P/N Not Required Not Required Not Required Not Required manual for all Groth blanket gas regulators manufactured after //99. PREURE SETTING All springs and spring ranges are the same, however, balance springs have been added in some spring ranges. Refer to tables, and below. FLOW CAPACITY SETTING The setting procedure is the same, but additional flow restrictions are available, down to % of full flow. Refer to table below. DISAEMBLY Some regulators utilize a balance spring inside the body (refer to Tables & and Figure on the reverse side of this page). Hex bolts [8] are used in place of the countersunk screws [0] to mount the body to the actuator housing. As the bolts are removed, the internal spring [0] will force the guide ring [] out of the body. The force is not great enough to present a hazard, but caution should be used to prevent damage to the ring. The spring can then be removed as part of the piston sub-assembly. Proceed with disassembly according to the manual. AEMBLY Prepare the body, piston sub-assembly and upper actuator housing according to the manual. Attach the piston diaphragm [], diaphragm retainer [9] and lower piston pin [] to the piston subassembly. Note: The reinforced (rough) surface of the piston diaphragm [] must be facing away from the piston, ie: high pressure on the smooth side. This is critical for the top (inlet) piston diaphragm. Proceed with assembly according to the manual, except where a balance spring is utilized, then proceed as follows: Slide the small end of the balance spring [0] over the piston subassembly until it seats on the retaining ring []. Insert this piston/spring sub-assembly into the body. Fit the large end of the balance spring into the groove in the guide ring [] and compress the spring as you insert the guide ring and O-Ring [] into the body. Hold the guide ring as you position the actuator housing [] onto the body. The weight of the housing will maintain compression of the spring. Install hex bolts [8] and lockwashers [9] and tighten uniformly. Proceed with assembly according to the manual. See piston/body/diaphragm sub-assembly drawing (Figure ) and bill of materials on the next page.

22 Figure 9 ITEM QTY DESCRIPTION Pin, Upper Piston Retainer, Diaphragm Adapter, Bonnet Plate, Diaphragm Support Plate, Back-Up Diaphragm, Piston O-Ring, Guide Ring Ring, Guide - Piston Piston O-Ring, Piston Seat Pin, Lower Piston Bolt, Hex Washer, Lock Spring, Balance Retainer, O-Ring Piston Seat Retaining Ring Stop, Lift Sleeve, Orifice Selector O-ring, Lockdown Screw Screw, Locking - Flow Orifice Screw, Flathead Washer, Countersunk