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Provides proportional control of large dampers in HVAC systems or inlet vanes on a VAV fan. Positive positioner available separately. Replacement devices are available for Robertshaw actuator models.


  • Rolling diaphragm operated.
  • Fail safe on over pressure.
  • Actuator can be swivel mounted from either end to pipe, floor, or wall surface.
  • Optional positive positioner provides accurate positioning under varying load conditions.

Product Specifications

Dimensions (in.)
Less bracket: 12 7/32 in. long, 6 3/16 in. diameter / Less bracket with positioner: 16 7/32 in. long, 8 1/4 in. diameter
Dimensions (mm)
Less bracket: 315 long, 157 mm diameter / Less bracket with positioner: 415 mm long, 210 mm diameter
Maximum Safe Operating Pressure (psi)
29 psi
Maximum Safe Operating Pressure (kPa)
200 kPa
Temperature Range (F)
-20 F to +158 F
Temperature Range (C)
-30 C to +70 C
Actuator only. No Bracket. Order positive positioner, mounting and connecting hardware separately. See Installation Instructions form no. 95-6053
Operating Humidity Range (% RH)
5 to 95% RH
Actuator Type
Fail Safe Mode
Spring Return
Stroke (in.)
6 in.
Stroke (mm)
150 mm
Actuator Force
Spring Range (psi)
7.25 psi to 13 psi
Spring Range (kPa)
50 kPa to 90 kPa
Diaphragm Effective Area (sq in.)
24.8 sq in.
Diaphragm Effective Area (sq cm)
160 sq cm
Air connections
Barbed fitting for 1/4 in. O.D. plastic tubing
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