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Shreeraj’s Piston Pneumatic Actuator is a pneumatically powered piston type actuator with an integrated manual over ride. The actuator utilizes pressure acting on a movable piston to move the bonnet stem and gate to the operating position. When actuator control pressure is removed, valve pressure acting on the bonnet stem moves the gate to the normal position, closed for reverse acting and open for direct acting gate valves. A heavy duty spring ensures complete valve stroke in the absence of valve body
pressure. Shreeraj manufactures the widest range of API monogrammed Piston Pneumatic Actuators in the industry. The piston actuator is currently available in two sizes for valves with up to a 1.13/16″ and 2.1/16″ bore and working pressures from 2,000 to 10,000 psi. piston Pneumatic actuators are only delivered as complete actuated valve assemblies or as replacement actuator and bonnet assemblies designed to mount on valves.
LONGER TOP SHAFT SEAL LIFE
Polypak seals are used for actuator shaft sealing applications.
These seals are protected from accumulation of dirt and debris
by a durable wiper ring. These two features provide long seal
life and minimal maintenance.
EASY MAINTENANCE
The Actuator is easy to maintain. The Actuator design allows
for easy removal of the piston housing for piston and shaft seal
replacement.
IMPROVED CORROSION CONTROL
All non-stainless components are coated with Xylan or powder
providing resistance against the corrosive effect of harsh
environments.
OVER-PRESSURIZATION PROTECTION
A pressure relief device located on the Actuator top case
protects personnel from over pressurization of the actuator
assembly. It is located for easy field inspection & replacement.
CONFIRMATION OF BONNET STEM / BACK SEAT SEAL
INTEGRITY
The bonnet is designed with a test fitting below the bonnet
packing seals. This test fitting provides for verification of the
bonnet stem metal to metal back seat pressure sealing
integrity.
FLEXIBLE ADAPTION
The Actuator can be mounted on the secondary master or
wellhead flow wing. The actuator can be mounted at any point
where safety shut down or safety valves are required.
EASY CLOSING
The Actuator can manually open the gate valve in case of
pneumatic control pressure loss or mechanical failure without
assistance of an outside pressure source.
VISUAL CONFIRMATION OF BONNET PACKING
A tattletale port located above the bonnet packing seals
provides visual confirmation of the packing integrity.
PNEUMATIC CONTROL SUPPLY
The piston pneumatic actuator operates at a maximum of 250 psi
FAIL SAFE OPERATION
The Piston Pneumatic Actuators will close a gate valve to the
“Fail Safe” or “Fail Close” position automatically.
MULTIPLE SAFEGUARDS AGAINST WELL FLUIDS
CONTAMINATION
The bonnet incorporates multiple safeguards against the invasion
of well fluids into the actuator housing. These safeguards are:
| FLANGE SIZE | WORKING PRESSURE | CASING SIZE | A | B | C | D |
|---|---|---|---|---|---|---|
| 11” | 3,000 | 8.5/8” | 17” | 10.1/8” | 10.7/8” | 8” |
| 11” | 3,000 | 9.5/8” | 17” | 10.1/8” | 10.7/8” | 9” |
| 11” | 3,000 | 10.3/4” | 16” | 10.1/8” | 10.7/8” | 10” |
| 11” | 5,000 | 8.5/8” | 17” | 10.1/8” | 10.7/8” | 8” |
| 11” | 5,000 | 9.5/8” | 17” | 10.1/8” | 10.7/8” | 9” |
| 11” | 5,000 | 10.3/4” | 17” | 10.1/8” | 13.1/2” | 10” |
| 13.5/8” | 2,000 | 11.3/4” | 17” | 10.1/8” | 13.1/2” | 11” |
| 13.5/8” | 2,000 | 13.3/8” | 17” | 10.1/8” | 13.1/2” | 12.1/2” |
| 13.3/8” | 3,000 | 11.3/4” | 17” | 10.1/8” | 13.1/2” | 11” |
| 13.5/8” | 3,000 | 13.3/8” | 17” | 10.1/8” | 13.1/2” | 12.1/2” |
| 13.5/8” | 5,000 | 11.3/4” | 17” | 10.1/8” | 10.7/8” | 12.3/8” |
| 16.3/4” | 2,000 | 13.3/8” | 17” | 10.1/8” | 16.5/8” | 12.1/2” |
| 16.3/4” | 2,000 | 16” | 19” | 10.1/2” | 16.5/8” | 15.1/4” |
| 16.3/4” | 3,000 | 13.3/8” | 20” | 10.5/8” | 16.5/8” | 12.1/2” |
| 16.3/4” | 3,000 | 16” | 20” | 10.5/8” | 16.5/8” | 15” |
| 21.1/4” | 2,000 | 18.5/8” | 20” | 10.1/4” | 20.1/8” | 18” |
| 21.1/4” | 2,000 | 20” | 20” | 10.1/4” | 20.1/8” | 19” |
| 20.3/4” | 3,000 | 18.5/8” | 23” | 15” | 20.1/8” | 18” |
| 21.1/4” | 3,000 | 20” | 23” | 15” | 20.1/8” | 19” |
