“aira” Offers SAY-DA 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 90° 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 jackscrew, hydraulic overrides, limit switches, solenoids and positioners…
SAY-14 To SAY-60
-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
