Model Alga
Double acting pneumatic quarter-turn actuator for output torques to 248,500 Nm.雙氣動輸出扭矩回轉執(zhí)行器248500牛米
Double acting pneumatic quarter-turn actuator for output torques to 248,500 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:
- Two bronze yoke bearings ensure minimal friction. - Two bronze sliding block bearings spread load over large surface area. - Guide block bearing and piston rod bearing of sintered bronze impregnated with PTFE increase efficiency, reduce maintenance and prolong actuator 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.
- 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
Specifications
| Technical Data | | |
| Supply pressure | : | 1.5 to 10.5 bar |
| Supply medium | : | air, nitrogen or sweet gas |
| Output torque | : | to 248,500 Nm |
| | | Ambient temperature |
| | | standard range : -30°C to +100°C |
| | | (-20°F to +210°F) |
| | | optional ranges : -55°C to +150°C |
| | | (-65°F to +300°F) |
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