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Actuators
Hydraulic power for quarter-turn valves, from 35 to 112,595 Nm: compact electro-hydraulic units that need only electric power, rack & pinion and scotch yoke actuators up to 200 bar for the largest valves, plus linear piston actuators up to 402 kN for globe, gate and control valves.
Electro-hydraulic, rack & pinion, scotch yoke and linear piston
Highest output torque (HRSDA at 160 bar)
Maximum hydraulic pressure (scotch yoke, linear)
Highest linear thrust (HLDA-200 at 160 bar)
Actuator finder
Pick what the actuator has to do and the torque your valve needs. We’ll point you to the series that fit.
Types
Pick a type to see its sizes and torque tables, with a quote.
Torque ranges
Each bar shows the torque range of a rotary type, from 35 to 112,595 Nm on a log scale. Ratings vary by size and pressure, so check the torque tables. The HLDA linear piston is rated in thrust (6–402 kN), not torque.
Complete the package
Add a limit switch box to report the valve position, or choose another type where hydraulics aren’t the right fit.
FAQ
Hydraulics give very high torque from a small body and little input power, because the pump drives the cylinder directly with no gearbox. Most wear parts run in oil, so they wear very little, and they suit outdoor, marine and hazardous locations.
Choose a spring return model (PANDA, PA, PA-HX or HRSSA), or a pressure accumulator, to store the energy that moves the valve to its safe position when power is lost.
The motor runs on 400 V 50/60 Hz or 230 V 50 Hz, and the solenoid valve on 24 VDC or 230 V. Only electric power is needed: the pump and oil are built in.
HLP hydraulic oil, filtered to at least 10 µm.
Yes. PANDA and PA are available ATEX certified for Zone 1 and 2, and in SIL 2 certified versions. Tell us the zone and gas group and we’ll confirm the build.
Yes. The HLDA linear piston actuator pushes and pulls the valve stem: 11 bores from 32 to 200 mm, giving 6 to 402 kN of closing thrust at 100 to 160 bar. It comes hydraulic (HLDA) or electro-hydraulic (EHLDA) with a power pack.
Send us the valve, its torque, your power supply and the fail-safe position, and we’ll size the actuator and quote it with its controls.
