Spring return pneumatic quarter-turn actuator for spring end torques to 77,400 Nm.彈簧復(fù)位氣動(dòng)回轉(zhuǎn)執(zhí)行器至77,400 Nm的扭矩
Model Algas
- Description
- Specifications
- Documentation
Spring return pneumatic quarter-turn actuator for spring end torques to 77,400 Nm.
Features & Benefits:
- Scotch yoke design generates high break torque needed for the actuation of many quarter-turn valves.
- Six bearings provide reliability, smooth operation and extended service life:
- Graphite-impregnated PTFE piston bearing reduces friction between the piston and cylinder bore and allows the cylinder to be operated without lubrication.
- Guide bar supports the transverse forces and insures proper support of the piston rod. Hard chrome plating on guide bar provides corrosion resistance and minimal friction loads.
- Chrome-plated piston rods provide maximum corrosion resistance and minimal friction loads on dynamic seals.
- Electroless nickel-plated cylinder bore provides maximum corrosion resistance and reliability.
- Multiple external tie bar design provides maximum cylinder integrity.
- Totally enclosed, weatherproof carbon steel housing provides maximum strength. Internal coating protects against corrosion.
- External travel stops allow precise adjustments of ± 4° rotation at each end of travel.
- Low hysteresis and high response enhance modulating service.
- Spring cartridge incorporates up to four springs, fully encapsulated in a tamper-proof factory welded assembly.
- Spring configurations available up to 77.400 Nm spring end torque.
- Available with canted or with symmetric scotch yoke mechanism to suit the valve characteristics.
- Special coatings for offshore or corrosive environments.
- Special version available for use with sour gas supply.
- ATEX certified II 2 G D.
- Guide bar supports the transverse forces and insures proper support of the piston rod. Hard chrome plating on guide bar provides corrosion resistance and minimal friction loads.
