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Pneumatic Actuator Model PCD/PCS

Pneumatic Actuator Model PCD/PCS
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Pneumatic Actuator Model PCD/PCS

Product catalog summary
General Overview
This document provides comprehensive Installation, Operating, and Maintenance (IOM) instructions for the Compact II pneumatic actuator. It stresses the importance of understanding the entire manual before use and highlights safety precautions to prevent injuries or property damage.
Warnings & Safety Instructions
  • Ensure the actuator is isolated from air supply or electrical ancillaries before maintenance.
  • Depressurize and drain lines before removing the actuator from a valve.
  • Only qualified personnel should handle the actuator.
  • Use only Compact II components and spare parts.
  • Follow pressure and temperature limits as indicated.
  • Adhere to national or local safety laws and regulations.
Operating Conditions
  • Supply Pressure: Double-acting actuators operate at 2-8 barg, while spring-return actuators operate at 3-8 barg.
  • Temperature: Standard limits are -20°C to +80°C. Special materials are required for temperatures beyond these limits.
  • Lubricants: Specific lubricants are recommended for different O-ring materials.
  • Explosive Environment: The actuator is certified for use in potentially explosive areas.
  • Air Supply: Use clean, dry air or inert gases. Oxygen or hydrogen must not be used.
Principle of Operation
The Compact II actuator is a pneumatic quarter-turn Rack & Pinion actuator featuring four pistons around one pinion, allowing it to generate twice the torque of dual piston actuators.
Installation & Maintenance
  • Storage: Store actuators in a clean, dry environment. Plug air ports during storage.
  • Air Connections: Marked as A and B, with specific configurations for different sizes.
  • Travel Adjustment: Factory adjusted for 90° rotation, with screws for fine-tuning.
  • Indicator & Puck: Features a visible indicator with interchangeable flow direction arrows.
Disassembly & Assembly
  • Disassembly: Follow specific steps for removing covers, pistons, and pinion. Ensure no pressure is present before disassembly.
  • Assembly: Clean and grease all parts before assembly. Follow specific instructions for reassembling components.
Identification
Actuators come with a nameplate detailing size, model, type, and other specifications.
Assembly Instructions
  1. Fit the thrust washer and pinion O-ring to the pinion and stop.
  2. Insert the pinion assembly into the body, ensuring the thrust washer tongue engages with the body groove.
  3. Align grooves of the stop perpendicular to adjustment screws for correct rotation angle.
  4. Fit the pinion O-ring, thrust washer, and disc bearing to the pinion.
  5. Use a new circlip on the pinion and ensure proper engagement of the thrust bearing tongue.
  6. Rotate the body to insert pistons, ensuring teeth engagement with pinion teeth.
  7. Apply grease to pistons, grooves, and O-rings.
  8. Assemble covers and tighten screws in sequence.
Torque Specifications
  • C15-C20: M5 screws, 3.5 Lb-ft
  • C25-C30: M8 screws, 9.0 Lb-ft
  • C35: M10 screws, 18.0 Lb-ft
  • C45-C75: M12/M16 screws, 40.0 Lb-ft
Pinion Assembly for Sizes C45-C75
Differences in pinion assembly for larger sizes, with smaller top bearing and O-ring. Assemble top bearing and O-ring from the bottom.
Testing Procedures
Pneumatic Leak Test:
  • Ensure no leakage across pistons or to the environment.
  • Use a leak testing solution; a bubble breaking every 10 seconds is acceptable.
  • Test pressure: 80 psig (5.5 barg).
  • Cycle actuator 5 times before testing.
Piston Leakage:
  • Apply pressure to port A, check port B for leakage, and vice versa for DA actuators.
  • Disassemble and inspect if leakage is observed.
External Leakage:
  • Apply pressure to port A for SR actuators and both ports for DA actuators.
  • Check for leakage at pinion output and covers.
See more

Catalog excerpts

Pneumatic Actuator Model PCD/PCS-1

1. GEN E RAL This Ins t all a ti on, Op erati ng & Ma int ena n c e manu al c o v e rs the ins t ruc t i ons requir e d for s a fe u s e of th e Com p act II pn eum atic ac tuator . Be fore > u s ing the a c tuato r , read the enti r e I O M and ma k e s u re y o u un ders t and ev e r y t hi n g . WARNING S & SAF E TY I N ST RUCT I O NS Ha ywa r d canno t a n ti cipa te al l of th e sit uat ion s a use r may enc ounte r while ins t alling and us ing the Compa c t I I ac tuators . The us er mus t k now and follow a l l ap plic able > res u lt in injurie s or propert y damage. Refer to Hayward Compact II c a ta logu e f o r add iti onal p r odu ct saf e t y > 1 . Ma ke sure t h e act u a t o r i s i s o l at ed f r om ai r suppl y o r ele c t r i c al an cilla ri e s bef ore att e mp ti ng to do an y ma in tena n c e. 2 . Before remov i ng the ac tuator from a v a lv e always m a k e su re the line ha s b een dep re ss uri z ed and d r ained. Cyc l e t h e v a lv e a fe w t i m e s t o r e l i e v e a n y p r e s s u r e t h a t c o u l d be t r app ed in the bod y c a vit y . 3. Utmos t c aut ion m u s t be tak en w hen han dli ng the ac tuat or. Only q u a lifi ed pers o n a l are who ar e tra i ne d f o r mai n te nanc e work and hav e rea d t h e ins t ruc t i ons ar e t o as s e mble or dis a s s e mbl e th e ac tu at or. 4. Before op erat ing a n ac tu ator wh ic h is c onnec te d t o a v a lv e in the pi pel in e, m a k e s u re y o u k now the v a lv e functio n . 5. Us e only Com pac t II c o m pon ents an d s pare parts s uppli ed in the Re pair K i ts . 6. Do not att e m p t t o r e mov e the ac tu ato r pis t ons by us e of air pr es s u re whe n the c o v e rs h a v e b een r e m o v ed. 7. Do not le av e a n y grip k e y or s h aft c onn ec tion att a c h e d to th e ac t uat or, or try to m anu ally op erate th e ac tu ator while it is s t i ll c o n n e c t ed t o t he air pr es s u re. 8. Us e the ac tuat or within th e pr es s u re an d t e m perat ure l i m i t s i n dic a ted on the nameplate or as gi v en in our c a talo gue an d IO M. 9. Th e o p e r a t o r m u s t f o ll ow a n d obs erv e any n a t i o na l o r lo cal s a f e t y l a w and regu lat i on imp o s ed b y h i s system HAYWARD INDU STRIAL PRODU C TS INC . ONE H AYWARD INDUSTRIAL DR IVE > CL EMM O NS, NC 270 12 -510 PHONE 336 -7 12 -9 900 WWW.HAYWAR D INDUSTRIAL.C O M Page 1 > T M - 3 6- 01 C - 01/05 - H A size="-1">

 Open the catalog to page 1
Pneumatic Actuator Model PCD/PCS-2

STORAGE the pipes. Pipes must be flushed with air to clean the passages. Where sealants are been used for threaded connections, care must be taken to avoid excess material been forced into the actuator ports. The Compact actuator has been packaged to provide protection during shipment, however, it can be damaged in transport. Prior to storage, inspect the actuator for shipping damage. Keep the actuators in their original packing box during storage. It is recommended to keep the actuators in a clean and dry environment until ready for use. The actuator has two air ports, which should be plugged...

 Open the catalog to page 2
Pneumatic Actuator Model PCD/PCS-3

AIR CONNECTIONS Double Acting (DA) The actuator air connections are marked A and B . Port B connects to a chain of holes to all the four pistons. The air passes into the Namur cover (or insert) and through holes which are connented to the two neibouring pistons. Each piston recieves the air flow from two directions which ensures a quick response. Pressure entering Port A to open: Center chamber pressurized. Pistons move outward and the pinion rotates counter clockwise (CCW). In sizes C15 to C45 port A is to the right and port B to the left. > Pressure entering Port B to close: Outside chambers...

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Pneumatic Actuator Model PCD/PCS-4

NAMUR Solenoid Mounting Air supply connection is done by mounting a solenoid directly onto the Namur cover which has a mounting pad conforming to the Namur standards. (Only Solenoids made to the NAMUR standard can be mounted in this way.) The Compact II actuator can also be piped with solid or flexible tubing from remote solenoid valves. > All actuators are assembled with a highly visible indicator or puck. The indicator and puck have interchangeable snap-onԔ flow direction arrows for identification of valve position. > The arrows provide any type of pattern according to the valve ports. Use...

 Open the catalog to page 4
Pneumatic Actuator Model PCD/PCS-5

General Before performing any disassembly operations make sure you read all the warnings and safety instructions in this leaflet. Do not attempt to disassemble the actuator while it is still connected to the valve or to any ancillary. Verify that the actuator is not pressurized. Check that the air ports are vented and spring return actuators are in the fail close position. Work in a clean area, free of dust, debris, grease, corrosives and moisture. For security and comfort do the repairs on a table with a vice and available air supply. Clamp an adaptor to the vice and place the actuator drive...

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Pneumatic Actuator Model PCD/PCS-6

Top View Side View Leftscrew 4.1 Looking at the actuator as shown to the left, withdraw the left of each pair of stroke adjustment screws (19) approximately 6-10 mm outward. This will enable the stop to rotate beyond its 90 limit so the pistons can come out. It may require a little force to release the adjustment screws as they are assembled with a thin layer of LoctiteЮ 221. > Namur CoverSide Leftscrew Leftscrew 4.2 Grip the actuator body with both hands and rotate it in the CW direction to eject the 4 pistons out of their cylinders. The 4 pistons will eject out of the actuator body as demonstrated...

 Open the catalog to page 6
Pneumatic Actuator Model PCD/PCS-7

Top View Top View Bottom View General Before performing assembly, clean the grease in the cylinders and all the actuator parts. Check the cylinder for any scratches. The surface should be smooth and without any damage, debris, rust or other contaminants. Apply grease to all the parts prior to assembly. > StopProtrusions 45 45а 6.1 If you have removed the pads, push them back into their holes as shown in section 4.4. 6.2 If the stop (13) has been removed from the pinion (12), insert it back making sure the orientation of the two stop protrusions are at 45 to the Namur slot as shown in the drawing...

 Open the catalog to page 7

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.