Key Parameters Category Parameter Name Description & Typical Values General Specifications Actuator Type Pneumatic, Double-Acting, Scotch-Yoke Motion 90° Rotary (quarter-turn) Housing Material Carbon Steel - Standard. Shaft Bearings Heavy-duty roller bearings for low friction and high load capacity. Air & Pressure Data Standard Supply Pressure 40 to 120 psig (2.8 to 8.3 bar) is typical. Can operate at lower pressures, but with reduced torque. Maximum Supply Pressure Typically 150 psig (10.3 bar). Torque Output Output Torque Generates very high torque. Specific values are defined by torque charts based on air supply pressure and actuator size (e.g., Size 120, 140, 170, etc.). • Example: A 167D Size 170 can produce over 100,000 in-lbs (~11,300 Nm) of torque at 100 psig. Performance & Physical Air Consumption High. Volume is large and depends on actuator size. Requires a significant air supply system and large solenoid valves. Temperature Limits Standard: -20°F to 150°F (-29°C to 66°C). Special seals and lubricants can extend this range. Mounting Directly to valves using a standardized mounting pattern (ISO 5211). Options & Accessories Positioners: Can be mounted with a Fisher 3582 or similar high-capacity rotary positioner for precise modulating control. Limit Switches: Feedback devices (e.g., Fisher 415) can be added to indicate valve position. Solenoid Valves: Large, high-flow 4-way solenoids are used for on/off control. Air Sets: Filter regulators (e.g., Fisher 67) are used to provide clean, regulated air. External Accumulator: Provides a source of stored air pressure to drive the actuator to a fail-safe position upon supply pressure loss.