Technical Parameters Parameter Specification Model Fisher A31D Type Double-Acting, Scotch Yoke Pneumatic Actuator Action Double-Acting (Air-to-Open / Air-to-Close) Standard Travel 90° quarter-turn. Body Material Aluminum with epoxy powder coat Piston Seal Material Buna-N (Standard) Operating Temperature Range -4°F to 180°F (-20°C to 82°C) with standard Buna-N seals. Supply Pressure Range 40 to 120 psig (2.8 to 8.3 bar) Torque Output Varies by size and supply pressure. Example (at 80 psig): - Size 6: ~ 115 lb-in (13 Nm) - Size 12: ~ 480 lb-in (54 Nm) - Size 20: ~ 1325 lb-in (150 Nm) Sizes (Frame Size) 6, 12, 20, 35, 60, 100, 160 (The number corresponds to the piston diameter in millimeters).
