Technical Parameters Parameter Specification Model Fisher A11 (with suffix for action: e.g., A11D, A11R) Type Spring-Return Diaphragm Actuator Action Direct (A11D) or Reverse (A11R) Standard Signal Range 3 to 15 psig (0.2 to 1.0 bar) Supply Pressure Range Up to 45 psig (3.1 bar) for the 3-15 psig range. Spring Ranges Multiple springs available for different thrust outputs and fail-safe actions. Effective Area Varies by size. Example (Size 20): 32 in² (206 cm²) Stem Thrust Varies by size and air pressure. Example (Size 20 at 15 psig): ~480 lb (2135 N) Stroke Lengths Available in various standard strokes, e.g., 0.5 to 1.5 inches (12.7 to 38.1 mm). Temperature Limits -20°F to 150°F (-29°C to 66°C) with standard Buna-N diaphragm. Diaphragm Material Buna-N with nylon cloth (standard)
