Key Parameters & Specifications Parameter / Feature Category Description Product Name Fisher™ Baumann™ 81000 Series Pneumatic Actuator Type Spring-and-Diaphragm, Rotary Actuator (scotch yoke design) Primary Function To provide rotary torque for operating quarter-turn valves (ball, butterfly, plug). Actuator Type Double-Acting or Spring-Return (Fail-Safe). Housing Material Glass-Reinforced Polyamide (Plastic - Type 6.6 G). Corrosion-resistant and lightweight. Supply Pressure Range Typically up to 115 psig (8 bar). Torque Output Varies by size and supply pressure. The series includes multiple frame sizes (e.g., 81100, 81200, 81300, 81400) with increasing torque output. (Exact torque values in lb-in or Nm must be obtained from the specific size's data sheet). Standard Rotation 90° quarter-turn. Temperature Range -4°F to 180°F (-20°C to 82°C). Mounting Designed to mount to valves with ISO 5211 mounting pads. A variety of mounting kits are available for different valve brands and sizes.
