Scotch Yoke Double Acting Pneumatic Actuator Manufacturer

Approvals

“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…

Specification & Standard

Size Range

SAY-14 To SAY-60

Temperature Range

-20°C To 90°C

Working Pressure

4 To 7 Bar

Model

OJS - 288

Body

S.G.Iron

Yoke Shaft

EN8

Seals

NBR

Mounting PCD

ISO 5211 Mounting Standard

Body Material

Aluminium - Extruded

Shaft Material

EN8

Piston Material

Aluminium

Application

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