d. General Features
• High performance
• High cycle life (1.000.000 operation)
• High torque value
• Standard position indicator
• For quarter turn valve automation (9Nm - 5162Nm)
• One compact design for double and single acting models
• Dual piston rack and pinion
• According to international standards (NAMUR, ISO5211)
• Body: Extruded aluminium
• Piston & Caps: Die cast aluminium
• 90˚ turn, two external travel stop adjustment ±5%
• 100% adjustable travel stop (on request)
Pressure : Double acting: 2.5 bar .... 8 bar
Single acting : 4 bar .... 8 bar
Temperature : Standard -20˚C ..... 80˚C
On request -20˚C ..... 150˚C, -30˚C .... 80˚C
• TORK Pneumatic actuators have been manufactured since 1986
• Lubrication : All moving parts are factory lubricated
• On request; exproof model (II 2G EEx c IIB T4)
Anodized Body
(Standard)
Epoxy Coated
Body
Nickel Coated
Body
PTFE Coated Body
100% Adjustable
on request
e. Design Features of TORK RA Serie Actuators
1) Actuator Body Aluminium extruded and honed surface body. Internal and external parts corrosion protected
2) Indicator It is standard on all actuators, it shows visual position of valve
3) Cover Provide max. resistance against corrosive elements, same cap design for double and single types actuators
4) Travel Adjustment Permits adjustment of ± 5% in both directions
5) Springs Springs provide high performance in safe emergency shutdown operation. Cartridge design & corrosion resistant
6) Bearing & Piston Guides High cycle life,wide operation temperature range,lubricating provide high performance
7) Nuts & Bolts Stainless steel body. Provide long term corrosion resistance.
8) Piston Rack and Pinion Provides wear resistance and protect against corrosion. Die cast pistons anodized aluminium fitted with
high quality seals and guides.
9) Connections
• Solenoid valves, switch box, positioners: Namur VDI/VDE 3845
• Bottom valve connection: ISO5211, DIN3337 standard
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