Hydraulic actuators of the STK series
Pleiger STK actuators are double-acting quarter-turn actuators for ball valves and butterfly valves, developed for extreme operating conditions in the petrochemical and natural gas industries.
90 degree quarter-turn actuator, for ball valves and butterfly valves
The double-acting actuators of the STK series were developed for extreme operating conditions in the petrochemical and natural gas industries, featuring exceptional durability and flexibility. Enhance your process reliability with hydraulic or electric position monitoring, or use these actuators as a base for our electro-hydraulic power packs.
Technical specifications
- Torque up to 50,000 Nm
- Maximum operating pressure 150 bar
- Angle of rotation 0 to max. 94°
- End position limit adjustable on one side (on both sides for ball valves)
- Connection dimensions according to DIN ISO 5211
Key features
- Constant torque over the entire swivel angle
- Compact design
- Submerged use in media and in the low-temperature range
- Leakage-free design with safety valve
- Space-saving direct mounting possible due to hollow shaft and flange connection
- Mechanical, hydraulic and electronic position indicators available
- Mechanical and hydraulic emergency operating device available
- SIL 2 capability according to IEC 61508
- SIL 3 with redundant design
- Integrated hydraulic and mechanical emergency override possible
The STK actuator delivers high torque that is identical in both directions of operation. Its simple, robust design also makes it exceptionally easy to service and maintain.
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