Key Design features:
- Carbon steel design single and double-acting cylinders. These are electroless nickel-plated to reduce surface roughness and to provide minimum friction and maximum protection against corrosion.
- The piston rods are carbon steel and chromium-plated. This helps prevent corrosion and minimises sliding friction on the dynamic seals. The rubber seals help to avoid slip effect, even after prolonged periods without operation.
- The visual position indicator is directly connected to the valve stem and shows actuator/valve full linear stroke.
- Totally enclosed carbon steel spring cartridge.
Approvals and industry standards:
- Actuators certified in accordance with ATEX Directive
- Actuators certified in accordance with PED Directive
- Actuators certified in accordance with EAC
- Actuators certified IP66M/67M in accordance with IEC 60529
Operating pressure:
Pneumatic design (LP): up to 12 bar(g) (175 psi)
Hydraulic (LH): up to 210 bar(g) (3 625 psi)
Output Thrust Performance:
pneumatic, double-acting actuator up to 1 800 kN (404 656 lbs)
pneumatic, single-acting actuator up to 186 kN (41 814 lbs)
Hydraulic design by double-acting operation up to 5 500 kN (1 236 450 lbs)
Hydraulic design by single-acting operation up to 400 kN (89 925 lbs)
Ambient temperature:
Standard designl: - 30 .. + 100 °C
Low temperature design: - 40 .. + 100 °C
Extremely low temperature design - 60 .. + 100 °C
High temperature design: + 160 °C-ig - upon request
Manual Override option:
Handwheel- MH - by rising stem and stem cover tube (if necessary)
Handwheel MHD - by rising stem and stem cover tube (if necessary) + declutchable hw
Hydraulic hand pump- by HPA unit - compact hydraulic controller by hydraulic working cylinder + manual hand pump/ tank and on&off ball valve. The open position can be fixed against the spring force by turning a hand knob (open/close) and by an on&off ball valve.
Detailed description about using available manual overrides can be asked from manufacturer or download from manufacturer' website.
Gearboxes as second stage of operators are available if sizes and system loads require it.
Control System:
Comprehensive control system either in panel cabinet mounted on wall or in a separate control box
Locally as a part of actuator itself or remotely from separate control room
Suitable for open&close/ or modulating duty and within ESD systems
Main components: limit switches, exhaust valves, pneumatic and hydraulic tubes & fittings - origin from certified suppliers or from Rotork directly.
Stem coupling:
CS - nickel plated coupling to connect piston rod (actuator' side) and valve stem
Coupling is supplied machined from actuator' side. To machine the coupling' valve side is the task either of end user or customer.
Seals:
NBR - Buna O-rings
PTFE sliding rings
Buna-PTFE-Bronze seals
