Aluminum Body Pressure Reducing Valve Screwed

SAY-SA Series Heavy Duty Scotch Yoke Actuators

Manufactured by Aira Pneumatics

Aira Pneumatics proudly offers the SAY-SA Series Heavy Duty Scotch Yoke Actuators, designed to deliver a wide range of torque up to 116,984 NM. These actuators are engineered for operating Ball, Butterfly, Plug Valves, Dampers, or any other quarter-turn devices used in on-off or throttling applications. The standard version features a symmetrical yoke design, which ensures maximum torque output at both ends of the 90° stroke. The square sliding bearing with a guide bar provides smooth stroke operation, high cycle life, and minimal wear.

As with all Aira Pneumatics actuators, the Scotch Yoke model is compatible with a complete set of accessories such as jack screws, hydraulic overrides, limit switches, solenoids, and positioners.

Specifications & Standards

Size Range: SAY-14 to SAY-50
Temperature Range: -20°C to 90°C
Working Pressure: 4 to 7 Bar
Model: OJS-288
Body Material: Aluminium, Anodized
Yoke Shaft Material: EN8
Seals: NBR
Mounting PCD: ISO 5211 Standard
Piston Material: Aluminium
Shaft Material: EN8
Application: Valve Operation

Features & Benefits

Travel Adjustment: ±8° travel adjustment for both clockwise and counter-clockwise strokes.
Nitrile Rubber Seals: Piston O-rings made of NBR ensure excellent sealing and durability. Optional seals for high and low temperatures are available.
PTFE Guide Band: Supports piston movement, offering smooth operation and prolonged actuator life.
Heavy-Duty Piston Rod: Extra-large and strong for enhanced torque transmission and long service life.
Namur Standard Mounting Pads: For mounting limit switches, positioners, and other accessories with ease.
Ductile Iron Center Body: For strength, durability, and reliability under tough conditions.
Modular Design: Flexible configuration with interchangeable power modules and spring cartridges for varied pressure and fail-safe requirements (Fail CW or Fail CCW).
Chrome-Plated Steel Cylinders: Heavy-duty steel cylinders plated for extended wear and corrosion resistance.
Welded Spring Cartridges: Safe and customizable for a wide range of air pressure settings.
Alloy Steel Springs: Corrosion-resistant, heat-treated, and engineered for high-cycle life.
Steel Slide Block with Bronze Bearings: Minimizes friction and maximizes actuator longevity.
Symmetric Carbon Steel Scotch Yoke Mechanism: Precision-designed for reliable torque transmission.
Weatherproof Design: Fully enclosed central body for harsh and outdoor environments.
Visual Position Indicator: For quick visual verification of valve position.