Hydraulic actuators of the STK series
90° 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 and are characterized by their durability and flexibility. Increase your process reliability with hydraulic or electrical position monitoring or use these actuators as the basis for our electro-hydraulic power packs.
- 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
Special 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
Advantages
01
High torque
02
Equal torque in both operating directions
03
Service- and maintenance-friendly design due to simple construction