Actuated Valves. May 2010

Transcription

1 Actuated Valves May

2 Introduction: Why to motorize a valve? Distant Location of the valves to be operated Need to have information about position of the valve every time Simultaneous functions: no possibility to operate few valves at a same time Reliability / Safety/ repetitive functions: to avoid possible human mistakes (someone forgot to open/close the valve) Avoiding forbidden operations Positioning (modulation) Comfort High torque 2

3 Cepex actuated valves range Ball valves (2 and 3 ways) - D16 > D110 - PVC-U / PVC-C - Electric or pneumatic actuation Butterfly Valves - D63 (2 ) > D315 (12 ) - PVC-U / PVC-C / PP / PVDF / ABS - Electric or pneumatic actuation 3

4 ELECTRIC Actuation 4

5 Electric Actuation: Ball Valve (2 and 3 ways) Electric actuator Electric actuator Actuator-valve Coupling bush Ball Valve Actuator-valve Coupling bush Mounting clamp Butterfly Valve Mounting Clamp Butterfly Valve 5

6 Electric Actuation: introduction The electric actuator operates the valve through an engine switched on by electric signals. At the reception of the electrical signal the engine turns according to the signal received until the internal cam presses the corresponding microswitch. Once the following signal is received, the engine turns on the opposite direction. Cam Micro 6

7 Electric Actuation: J+J vs. Valpes More then 35 years of experience in automatic valves world Reversible actuator, anti-corrosion polyamide body and cover, visual position indicator, valve coupling system ISO-5211, DIN Available Series: - L (low voltage): V AC/DC - H (high voltage): V AC/DC IP 65 Protection CE Certification French actuators well known and prestigious in the european market. Multivoltage from 90 to 240V only Coupling standards: ISO-5211, DIN-3337 Available Series: IP 65 Protection CE Certification - ER range (low torques): up to 100 N m - V ranges (high torques): up to 300 N m 7

8 Electric Actuation: J+J - Main features ATC TEMPERATURE THERMIC CONTROL: 4 W heater thermostatically controlled to maintain the temperature inside between 20ºC & 30º (68º F 86º F) and avoid failures caused by condensation. AVS MULTIVOLTAGE: Power supply A/C or D/C without distinction: - L : from 15 to 48 V AC or 12V to 48V DC - H : from 80 to 240 V AC or DC ETL ELECTRONIC TORQUE CONTROL: The continuous electronic control allows a smooth operation and a careful control of the motor consume up to the highest possible torque. When this point is exceeded the ETL system stops the power supply to avoid any possible failures in the actuator and allows the emergency manual operation. An internal LED gives visual information of the ETL situation. - LED on, informs of normal operation. - LED sparkling, informs that the maximum torque allowed has been exceeded. MO EMERGENCY MANUAL COMMAND: placing the lever in the manual position the motor is automaticallly off and the valve can be manually operated. PES AC/DC CONNECTION: Both options are available in the same actuator, the power supply must be connected according to the connections diagram appearing in the label on one side of the actuator, according to DIN external connection. AUXILIARY VFC CONTACTS: 2 additional contacts (microswitches) for confirming position. 8

9 Electric Actuation: J+J - Main features 9

10 Electric Actuation: J+J - Models Model Voltage Range AC or DC Max. Torque (Nm) Nominal Torque (Nm) Mounting J2-L F03/04/05 X 14 J2-L F05/07 X 17 J2-L F07/10 X 22 J2-L F07/10 X 22 J2-H F03/04/05 X 14 J2-H F05/07 X 17 J2-H F07/10 X 22 J2-H F07/10 X 22 J2 L / H 20 / 55 / 140 / 300 Serie J2 voltage: L: low H: high Working torque capacity 10

11 Electric Actuation: Valpes Main features MULTIVOLTAGE: Power supply in AC or DC without distinction from 90 to 240 V. TORQUE CONTROL: When the torque is exceeded, the actuator cuts the power supply in order to avoid possible failures on the actuator and allows the manual operation. EMERGENCY MANUAL COMMAND: Placing the lever in the manual position, the motor is automatically off and the valve can be manually. AC/DC CONNECTION: Both options are available in the same actuator, the power supply must be connected according to the connections diagram appearing in the label on one side of the actuator, according to DIN external connection. OPTIONS: Anti-condensation heater. 2 aditional contacts to confirm signal/position. Position transmitter 4-20 ma / 0-10V. 11

12 Electric Actuation: accessories Safety block (backup system) BSR (J+J) EBS/EBT (Valpes) The safety block is a device that once connected to an electric actuator allows to place the valve in a preferential position (NC or NO) in case of power failure. BSR (J+J). Battery constantly charging. Guaranted for 5 years. Autonomy for few operations. J+J: battery installed from factory into the actuator. Valpes: external battery in the past. During 2010 will be integrated. Conections (follow attached diagrams) 12

13 Electric Actuation: accessories Digital Positioner DPS 2000 (J+J) The DPS 2000 is an accessory for the J+J electric actuators which converts them in servocontrolled valve positioners. Allows placing the valve in an exact position (3% precision). The input (and output) signal can be of 0-10V o de 4-20mA. The installation is internal, that s why it must come installed from factory. Consult conections on the actuator s label. Aplication examples: - Remote control of a valve through a computer. - Dosage according to a temperature sensor. 13

14 Electric Actuation: Future innovations 14

15 Electric Actuation: Future innovations 15

16 Electric Actuation: Future innovations 2008 Coming soon 16

17 PNEUMATIC Actuation 17

18 Pneumatic Actuation Ball Valve (2 and 3 ways) Pneumatic actuator Electrovalve Limit-switch box Pneumatic Actuator Actuator-valve coupling bush Ball Valve Mounting Clamp Actuator-valve coupling bush Butterfly Valve Mounting clamp Butterfly Valve 18

19 Pneumatic Actuation: introduction The pneumatic actuator is based on a pinion-rack mechanism. Using compressed air that intakes/outlets the chambers of the actuator and pushes/operates a piston s gear assembly which turns the central shaft and operates the valve. Two different versions: DOUBLE ACTING or SPRING RETURN. Internal chamber External chamber 19

20 Pneumatic actuation: double acting The double acting actuator works by means of the direct movement of the pistons. The air injected in the actuator chamber puts certain pressure on the pistons, pushing them and operating a rack system connected to the valve shaft. The use of a solenoid valve is needed. This valve distributes compressed air in one or other chamber, depending on ther is electric signal or not. The speed of the opening or the closing operation can be controlled through safety regulators added to the solenoid valve. Strongly recommended in order to avoid waterhammers or vibrations in the pipeline. 20

21 Pneumatic actuation: spring return The spring return actuator works through springs system: when compressed air is injected in the internal actuator chamber at a certain pressure, the springs are retracted (making the valve open or close). The lack of air in the chamber allows the springs expansion (making the valve close or open). The springs (by retraction or expansion) move a rack and pinion system connected to the shaft of the valve, so the ball or disk opens or close. The use of a solenoid valve is needed. The solenoid receives information from the electric control box to allow or not the continuity of the air-flow, activating or deactivating the valve operation. It s a safety device. In case of a temporary lack of air flow, the actuator goes back to initial position thanks to the springs. The spring return actuators are the solution for controlled emptying applications. For example, if we want to withdraw a fluid from a tank and we have a sudden lack of air flow or power failure, the springs will return the valve to close position, avoiding an uncontrolled emptying. 21

22 Pneumatic Actuation: spring return vs. double acting Spring Return (Air to Spring / Fail safe) Requires air to open only, once air is exhausted springs close the valve. Fail position open or close if air supply is lost. NC (fail safe close) o NA (fail safe open) Double Acting (Air to Air) Requires air to open and air to close. No fail position if air supply is lost. 22

23 Pneumatic Actuation: accessories Solenoid valve. Open/closes the air-flow to the actuator, from an electric signal. 23

24 Pneumatic Actuation: accessories Scape regulators. Control the speed of the valve s operation. 24

25 Pneumatic Actuation: accessories Limit-switch box. Its use is advised as well. It is installed on the actuator allowing us to see from a distance (through indicating pilot lights) whether the operation of the valve is correct. It can be used also as control of other valves (allows sending signals). 25

26 Pneumatic Actuation: accessories Pneumatic and/or electro-pneumatic positioners: 26

27 Pneumatic Actuation: CH air vs. PRISMA 27

28 Pneumatic Actuation: Material: Aluminium Supply: Filtered compressed aire, either dry or lubricated, minimum pressure 1 bar, maximum pressure 10 bar. Lubrication made ex-factory and guaranteed for at least operations. The body internal surface finished (Ra 0,4-0,6 um) to reduce friction to a minimum and to extend the actuator life to the maximum. Gliders made of low friction coeficient material to avoid metal-metal contact, easily replaceable for maintenance. Double drill hole below for clamping and centering of the valve according to ISO5211 and DIN3337 standards. Recessed square output shaft connection according to ISO5211/DIN3337 standards for mounting at either 45º or 90º. Direct solenoid valve mounting according to NAMUR standard. Mounting accessory according to NAMUR VDI/VDE 3845 standards.. Working temperature from -20ºC up to +80ºC. Limit-switch at input and output. Monitoring and 100% air-tightness control by individually certified electronic system. Material: Polyamide Specially designed for plastic valves. Low weight and very resistant to corrosion. Suitable for marine and underwater installations. Working temperature from -32 ºC up to 90 ºC. Can be operated by aire, water or non-aggressive fluid up to 8 bar pressure. Minimum pressure, 2 bar. Spring return and double acting models with torques from 17Nm. Up to 165 Nm Building standards: ISO-5211, DIN-3337, VDE-3845, NAMUR. Can be equipped with limit-switches, solenoid valves, positioners, manual operation through wheel or differential declutch. Applications: water treatment plants, agrochemical industry, textile, pulp and paper, refinery, irrigation automation, etc. 28

29 Final Comparison 29

30 Electric Actuation vs. Pneumatic Actuation Electric Actuation Benefits: Comes with more serial components (limit-switches, manual control, etc.). No need for compressed aire installation (just electricity) Easy to install Specially recommended when we need to actuate one or few valves. Modular systems. In case of requiring positioner, this will be installed internally (does not take extra-room) Medium/high operation time (minimum 7-8 s), useful to avoid water hammers Possibility to add safety block (BSR) with battery for the maximum safety Constant torque. Less weight / room. No minimum pressure required as with the solenoid valves (air). Warnings: Not recommended for low time operation applications. Not recommended in explosion-risk environments, very humid or saline (ex: minery) Life: cycles guaranteed. 30

31 Electric Actuation vs. Pneumatic Actuation Pneumatic Actuation Benefits: Low operation time. In any case, the operation time can be regulated through escape regulators in the solenoid valve. Guarantees de maximum safety against supply failures (air and electricity) thanks to the spring-return. Appropriate for explosion-risk environments. Appropriate for installations with many actuated valves cycles guaranteed. (appropriate for applications which require many operations daily). Warnings: Requires compressed air supply as well as electricity supply to feed the solenoide valve. Not recommended for outsides (the compressed air can condensate) or when the valve is far-away (difficult to send the compressed air) Requires additional accessories: limit-switch box, solenoide valve, The torque constant (and thus the valve operation time) depends on the air pressure and thus in the correct working of the compressed air installation (example: the closer valves have pressure, but not the distants ones) 31

32 Electric Actuation vs. Pneumatic Actuation IMPORTANT: Always if possible is very important to have the maximum information about the application where the valve will be installed. This way we can recommend better which actuator should be used. 32

33 Applications 33

34 Applications Swimming-pools - Pool bottom/surface cleaning automation - Water level automation (compensation tank) - Drain filter open/close - 6 way multiport valve Industry -Tanks - Filter bowls - Filters cleaning - Raw material aspiration conduits - Water Distribution - Refrigeration conduits Water treatment - Water redistribution - Water conduit division. - Treated water reuse. - Filtration systems - Cleaning Irrigation systems - Areas divisions -Mastervalves - Automatic filtration systs. - Treated water distribution. Pumping systems - Pumped water distribution -Masterdistributionvalves Waste products handling - Air aspiration systems - Solid waste separation - Distribution of the treated waste 34

35 Applications Industry Michelin Plant (China) 35

36 Applications Water treatment 2003 World Swimming Championships 36

37 Applications 2003 World Swimming Championships 37

38 Applications 2003 World Swimming Championships 38

39 Quality & Guarantee 39

40 Quality Quality controls applied on 100% of actuated valves. Assembly process Definition of every customer s specific needs. Inspection of all components. Adjustment Working test on 100% of the valves (pressure + actuation) Look Controls. Total Traceability. Guarantee. 40

41 Thanks!! 41