
Products / Actuators
Rotary Actuators for Quarter-Turn Valve Automation
A full range of pneumatic rotary actuators engineered for reliable quarter-turn valve control. Rack-and-pinion spring return for fail-safe process control, scotch yoke for high-torque heavy-duty automation — all with ISO 5211 direct-mount.
Valvenok supplies a complete range of pneumatic rotary actuators for quarter-turn valve automation. From compact rack-and-pinion spring return units for general process control to heavy-duty scotch yoke actuators engineered for high-torque oil & gas, pipeline and offshore applications — every actuator is built to ISO 5211 mounting standards for direct-fit on ball, butterfly and plug valves.

SRA Series
SRA
Pneumatic rack-and-pinion rotary actuators with fail-safe spring return operation. ISO 5211 mounting for direct fit on quarter-turn ball, butterfly and plug valves across general process control.
Spring Return
Rack & Pinion
ISO 5211 Mount
90° Rotation

AD Series
AD
Scotch yoke pneumatic actuators engineered for high-torque quarter-turn valve automation. Symmetric and canted yoke designs deliver superior breakaway torque for heavy-duty oil & gas, pipeline and offshore applications.
Scotch Yoke
High Torque
Double Acting & Spring Return
90° Rotation

PDS Series
PDS
Scotch-Yoke pneumatic actuators engineered for superior break-out torque in demanding flow control environments. Available in double acting (PD) and single acting spring return (PS) configurations with hard anodized aluminum construction for corrosion resistance.
Scotch Yoke
3.5–8 Bar
-20°C to +80°C
ISO 5211 / NAMUR / VDI-VDE 3845
±5° Adjustable Travel Stops

HD Series
HD
Heavy-duty scotch yoke pneumatic actuators in Symmetric (IS) and Canted (IC) configurations, engineered for demanding industrial valve automation. Wide torque range for ball, butterfly and plug valves — on-off and modulating service. ATEX, SIL3 and PED certified.
Scotch Yoke IS & IC
132 – 120,867 Nm
3.5 – 10 bar
-20°C to +85°C
IP66 / IP67
ISO 5211 / ATEX / SIL3

PLDS Series
PLDS
Double-acting pneumatic linear cylinders engineered for precise motion control in automation systems and valve actuation. Low-friction seals, universal ISO mounting, and multiple corrosion protection grades for demanding industrial environments.
Double Acting
3 – 7 bar
-20°C to +80°C
IP66
ISO 3322 / 4393 / 5597
Multiple Corrosion Grades

MPLDS Series
MPLDS
Compact double-acting pneumatic linear actuators engineered for fine automation and precise linear motion in tight spaces. Modular design, IP66 protection, and wide pressure range with support for positioners, solenoids and limit switches.
Double Acting
2.1 – 6.2 bar (30–90 PSIG)
-10°C to +60°C
IP66
Compact Modular Design
Positioner / Solenoid Ready
ISO 5211
Mounting Standard
90° Rotation
Quarter-Turn
Fail-Safe
Spring Return Variants
High Torque
Scotch Yoke Variants
Fast Dispatch
Availability