MH74 Series Hydraulic Actuator | Schlumberger Products

MH74 Series

Hydraulic actuators

Our portfolio of Saf-T-Gard actuators includes the MH74 hydraulic actuator, which is used in the master run or wing run of the tree on a reverse-acting gate valve.

This hydraulic actuator can be used with all manufacturers' gate valves in nominal sizes from 2 to 5 in. Its simple design and operating principle make this hydraulic actuator suitable for all types of applications.

Advantages

  • Superior piston design
  • Visual piston indicator
  • Compression spring
  • Nonpressurized actuator housing
  • Fail-safe close design
  • Corrosion-resistant materials
  • Ease of maintenance
  • Permanent drift setting
  • Drain plugs flush housing
Saf-T-Gard Hydraulic Actuator - MH74 Series

Specifications

  • Model: MH74
  • Series: 7000
  • Specific application sizing: 1 13/16 through 5 1/8 in
  • API Classification: Spec 6A, 17th Edition, SSV
  • Trim for retained-fluid components: Same as valve and bonnet specifications
  • PR-1 and PR-2: Appendix F 2.5
  • Maximum operating pressure: 6,000 psi [414 bar]
  • Relief device setting (optional): 6,000 psi [414 bar]
  • Test pressure: 9,000 psi [621 bar]
  • Trim for standard components: AA
  • PSL: Retained fluid 1, 2, 3
  • Operating temperature: –20 to 250 degF [–29 to 138 degC]
Model Piston Size Valve Size, in
Valve Pressure, psi Crack-Open Pressure, psi Hold-Open Pressure, psi
Swept Volume, in3
Weight, lbm [kg]
MH7402 Single-piston hydraulic with 4-in piston 2 1/16 5,000 1,074 792 28.00 195 [88]
1 13/16 10,000 1,915 1,342 28.00 215 [97]
MH7403 Single-piston hydraulic with 4-in piston 3 1/8 5,000 1,669 1,063 41.10 205 [93]
3 1/16 10,000 3,157 1,853 41.10 225 [102]
MH7404 Single-piston hydraulic with 4-in piston 4 1/8 5,000 2,545 1,531 52.80 208 [95]
4 1/16 10,000 4,879 2,760 52.80 228 [103]
MH7405 Single-piston hydraulic with 4-in piston 5 1/8 5,000 3,799 2,298 53.37 210 [95]

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