Product description
The 1051M Series Diaphragm Rotary Actuator is a pneumatic spring-return actuator designed for use with rotary-shaft control valves. This is a direct-acting actuator, and an increase in the loading pressure extends the diaphragm rod out of the spring barrel. The 1051M Actuator is suitable for on-off service, or for throttling service when used with a valve positioner.
Valve Positioners and Accessories MK1051M
Operating Principle
- Direct Acting
Actuator size
- 30
- 40
- 60
Maximum Diaphragm Case Pressure
- 80 psig (5,5 bar)
- 65 psig (4,5 bar)
- 40 psig (2,8 bar)
Maximum Valve Shaft Rotation
- 90° with optional fixed stops
Acceptable Valve Shaft Diameters In. (mm)
- Size 30: 1/2" (12,7 mm), 5/8" (15,9 mm), 3/4" (19,1 mm)
- Size 40: 1/2" (12,7 mm), 5/8" (15,9 mm), 3/4" (19,1 mm), 7/8" (22,2 mm),1" (25,4 mm), 1-1/4" (31,8 mm)
- Size 60: 3/4" (19.1 mm), 7/8" (22,2 mm), 1" (25,4 mm), 1-1/4" (31,8 mm), 1-1/2" (38,1 mm), 1-3/4" (44,5 mm) or 2" (50,8 mm)
Material Temperature Capabilities
- Nitrile Diaphragm: -40° to 180°F (-40° to 82°C)
Pressure Connections
- 1/4" NPT Female
Weigh
- Size 30: Cast Iron Construction - Lb. 65 (29 kg)
Aluminum Construction - Lb. 55 (25 kg)
- Size 40: Cast Iron Construction - Lb. 94 (43 kg)
Aluminum Construction - Lb. 86 (39 kg)
- Size 60: Cast Iron Construction - Lb. 197 (89 kg)
Aluminum Construction - Lb. 175 (79 kg)
*Cast iron spring barrel and housing
*Sizes 30, 40 and 60: aluminum spring barrel, and housing cover
Features and Benefits
- The 1051M Series Diaphragm Rotary Actuator is a pneumatic spring-return actuator designed for use with rotary-shaft control valves. This is a direct-acting actuator, and an increase in the loading pressure extends the diaphragm rod out of the spring barrel. The 1051M Actuator is suitable for on-off service, or for throttling service when used with a valve positioner.
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