Technical Parameters Category Parameter Specification / Description General Model 167DA Type Direct-Acting Spring-Diaphragm Actuator Diaphragm Diameter 167 mm (7 inches) Performance Spring Range Defined by the suffix (e.g., -13). Common standard ranges include 3-15 psi (0.2-1.0 bar) and 6-30 psi (0.4-2.1 bar). Many other ranges are available. Strokes Available Multiple standard strokes are available (e.g., 25 mm, 38 mm, 50 mm, 75 mm, 100 mm). Thrust Output Approximate Thrust (lbs) at different air pressures: At 20 psi (1.4 bar): ~2,100 lbs (Downward) At 30 psi (2.1 bar): ~2,900 lbs (Downward) At 60 psi (4.1 bar): ~5,400 lbs (Downward) Note: Upward (spring) thrust is constant for a given spring range and stroke. Exact values require Fisher's actuator thrust tables. Physical & Environmental Diaphragm Case Material Cast Iron or Ductile Iron with corrosion-resistant coating. Spring Material Music wire with protective coating. Yoke Material Cast Iron or Ductile Iron. Standard Temperature For springs: -20°F to 150°F (-29°C to 66°C). Higher temperature springs are available. Mounting Designed to mount to Fisher 585C series globe valve bodies and other compatible valves via standardized mounting pads.