“aira” Offers SAY-SA Series heavy duty Scotch Yoke Actuators offer a broad range of torques to 116984 NM. The Scotch & Yoke is designed to operate Ball, Butterfly, Plug Valves, Dampers or any device that requires a quarter-turn movement for on-off or throttling services. Our standard offering is te symmetrical design yoke that delivers maximum torque at both ends of the 90o cycle. The square sliding bearing with guide bar gives high cycle life and smooth stroke while minimizing wear points. As with all “aira” actuators, our Scotch & Yoke comes with a complete line of accessories, including jack screw, hydraulic overrides, limit switches, solenoids and positioners…
Say-14 To Say-50
-20°C To 90°C
4 To 7 Bar
OJS - 288
Aluminium Anodized
EN8
NBR
ISO 5211 Mounting Standard
Aluminium - Extruded
EN8
Aluminium
Operating For Valve
1 – Travel adjustment ±8° for clock wise and counter-clock wise strokes.
2 – Nitrile rubber piston O-rings offer excellent sealing and wear. Optional low and high temperature seals and lube are available.
3 – PTFE Guide Band supports piston while providing smooth operation and extended life.
4 – Extra large, strong piston rod for long life and torque transmission.
5 – Namur accessory mounting pads permit mounting standardization of limit switches, positioners etc.
6 – Ductile iron center body.
7 – Modular design allows for installing power groups and spring cartridges so that actuators may be set up for different air pressures and for Fail Clockwise and Fail Counter-clockwise.
8 – Rugged heavy duty steel pressure cylinders chrome plated for long wear and corrosion resistance.
9 – Safe, welded spring cartridges with numerous options for a broad range of air pressure conditions.
10 – Alloy Steel, corrosion resistant and heat treated springs designed and manufactured for long high cycle life.
11 – Steel slide block, bronze slide bearings to minimize friction and provide long cycle life Visual position indicator.
12 – Carbon steel Scotch Yoke mechanism available in symmetric form.
13 – Totally enclosed weatherproof central body.
