Technical Specifications Category Specification Model 627W Type Pneumatic Spring-and-Diaphragm Rotary Actuator Weather Protection Weather-Resistant / Weather-Proof Design Action Spring-Return (Single-Acting). Provides fail-safe operation. Standard Travel 90 degrees Air Signal 3 to 15 psig (0.2 to 1.0 bar) standard. Spring Ranges Available in multiple spring ranges (e.g., 6-30 psig, 9-45 psig). The spring determines the air pressure required to stroke the actuator and the fail-safe action. Torque Output Varies by actuator size and air supply pressure. The 627 series provides a range of torque outputs suitable for small to medium-sized rotary valves. Mounting Designed for direct mounting to Fisher and other manufacturers' rotary valves using standardized mounting kits. Diaphragm Material Nitrile (Buna-N) is standard. Housing Material Coated Cast Iron or Aluminum for corrosion resistance. Temperature Limits Standard: -20°F to +180°F (-29°C to +82°C).
