Model SH Hydraulic Actuator | ProductsSLB

Model SH

Hydraulic actuators

Our SSS surface safety system actuators include the Model SH hydraulic actuator, which features a translating cylinder that makes it ideal for small spaces. This actuator operates valves ranging from 3 through 6 in and accommodates operating pressures up to 15,000 psi [1,034 bar], with a maximum control pressure of 6,000 psi [414 bar].

The piston assembly is available in 3- and 5-in sizes and features a dynamic T-seal that ensures reliable, smooth operation. An inspection window on the actuator provides visual indication of the gate valve position. Optional side-mount magnetic switches also are available.

Features

  • Universal adaptability for all commonly used gate valves
  • Large piston area that allows relatively low control pressures to overcome full valve differential
  • Captured power spring that ensures closure even when no valve body pressure is present
  • Molygard wiper rings prevent stem galling during operation and prohibit foreign particles on the surface of the stem from entering the actuator body and damaging the dynamic seal system
  • External safety relief device protects the actuator from overpressurization
SSS Model SH Hydraulic Actuator

Specifications

Service with 3-in piston without rising stem

  • Maximum operating pressure: 6,000 psi [414 bar]
  • Test pressure: 9,300 psi [641 bar]
  • Temperature range: –20 to 250 degF [–29 to 121 degC]
  • Product weight: 900 lbm [406 kg]
Standard, H2S, and CO2 Service

Maximum Control Pressure

Mounted on 3-in valve (0.360 × valve pressure) + 150 psi [10.3 bar]
Mounted on 4-in valve (0.480 × valve pressure) + 150 psi [10.3 bar]

Service with 3-in piston without rising stem

  • Maximum operating pressure: 6,000 psi [414 bar]
  • Test pressure: 9,300 psi [641 bar]
  • Temperature range: –20 to 250 degF [–29 to 121 degC]
  • Product weight: 900 lbm [406 kg]
Standard, H2S, and CO2 Service

Maximum Control Pressure

Mounted on 4-in valve (0.220 × valve pressure) + 80 psi [5.5 bar]
Mounted on 5-in valve (0.380 × valve pressure) + 80 psi [5.5 bar]
Mounted on 6-in valve (0.450 × valve pressure) + 80 psi [5.5 bar]

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