Key Parameters & Specifications Parameter / Feature Category Description Product Name Fisher™ Yarway™ AT-37 / AT-47 Pneumatic Actuator Type Rack and Pinion, Quarter-Turn Pneumatic Actuator Primary Function To provide rotary torque for operating quarter-turn valves (ball, butterfly, plug). Actuator Type Double-Acting or Spring-Return (Fail-Safe). Supply Pressure Range Typically 40 to 120 psig (2.8 to 8.3 bar). Torque Output Varies with supply pressure. The AT-47 provides higher torque than the AT-37 at the same supply pressure. (Exact torque values in lb-in or Nm depend on the specific model and must be obtained from the data sheet). Standard Rotation 90° quarter-turn. Mounting Direct mounting to valves with ISO 5211 mounting pads. Can be fitted with a variety of mounting kits for specific valve brands. Position Indication Mechanical travel indicator (visual pointer) to show valve position (Open/Closed). Accessory Ports Prepared for the installation of accessories such as: Limit Switches (e.g., for position feedback) Solenoid Valves (for on/off pneumatic control) Positioners (e.g., Fisher 3720 for proportional control) | | Materials | Body: Aluminum or ductile iron. Internal Parts: Stainless steel and other corrosion-resistant materials. | | Temperature Range | Standard: -4°F to 180°F (-20°C to 82°C). Higher temperatures possible with special seals. |

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