Clear Stem Protector
For actuator applications
See the actuator's rising stem while preventing damage to it.
The SSS surface safety system actuator line includes the compact Model E hydraulic actuator. Intended for gate valves from 1 13/16 through 7 1/16 in, this durable actuator can operate valves with pressures up to 15,000 psi [1,034 bar] with control pressures of 6,000 psi [414 bar].
The piston assembly is located in the top of the actuator and is available in 5- and 7-in sizes. The actuator also includes a large piston area that permits the use of lower control pressures. In the fail-safe position, the stem rises and serves as a visual indicator. The Model E design incorporates the patented Quick-Disconnect bonnet, which allows for installation or removal of the actuator without depressurizing the gate valve.
The Model E actuator is available for standard, H2S, and CO2 service, with temperature ranges from –20 to 250 degF [–29 to 121 degC]. Optional side-mount magnetic limit switches are available to provide valve position indication to a remote control station. A model for arctic service also is available.
Service for 5-in piston
||Maximum Control Pressure|
|Mounted on 2 1/2-in valve||(0.120 × valve pressure) + 50 psi [3.4 bar]|
|Mounted on 3-in valve
||(0.160 × valve pressure) + 50 psi [3.4 bar]|
|Mounted on 4-in valve
||(0.227 × valve pressure) + 75 psi [5.1 bar]|
|Mounted on 4-in valve with eight-bolt bonnet assembly||(0.330 × valve pressure) + 75 psi [5.1 bar]|
Service for 7-in piston
|H2S Service||Maximum Control Pressure|
|Mounted on 5-in valve
||(0.294 × valve pressure) + 75 psi [5.1 bar]|
|Mounted on 6-in valve
||(0.315 × valve pressure) + 75 psi [5.1 bar]|
|Mounted on 6 3/8-in valve with eight-bolt bonnet assembly||(0.340 × valve pressure) + 22 psi [1.5 bar]|