Unloader Pilot Valves are Used In Compressed Air Systems to Actuate Another Device Using a Pneumatic (Air) Signal. Unloader Pilot Valves Always Work in Conjunction with Another Device.
Pilot Valves Operate in a Set Pressure Range. The Range has an Unload Setting and a Load Setting. As a Compressor Operates in This Range, It is Said to Be Cycling.
At the Unload Setting the Pilot Valves Opens and Actuates Another Device (Throttle Control, Discharge Valve). At the Load Setting the Pilot Valve Closes and Returns the Compressor to Normal Operation.
- Construction: C360 Machined Brass Body, Music Wire Spring, Stainless Steel Pilot Valve Ball
- Maximum Temperature: 350˚F
- Field Adjustable
(For All Models Except MCRCL, MCRCLD)
- Minimum Cut- In Pressure: 40 PSI
- Maximum Cut- Out Pressure: 250PSI
For MCRCL, MCRCLD
- Minimum Cut- In Pressure: 20 PSI
- Maximum Cut- Out Pressure: 1200 PSI
Part No. |
Cut In |
Cut Out |
Inlet |
Outlet |
PILOT VALVE WITH HAND UNLOADER AND MOUNTING BOSS 1/4 F x 1/8 F |
MCP25-HU95-115 |
95 |
115 |
1/4 Female |
1/8 Female |
MCP25-HU145-175 |
145 |
175 |
| |
PILOT VALVE WITH HAND UNLOADER 1/4 F x 1/8 F |
MCRCB-HU95-115 |
95 |
115 |
1/4 Female |
1/8 Female |
MCRCB-HU145-175 |
145 |
175 |
| |
PILOT VAVLE WITH STRAIGHT STEM START STOP OPERATION 1/4 M x 1/8 F |
MCRCBM-95-115 |
95 |
115 |
1/4 Male |
1/8 Female |
| |
PILOT VALVE WITH HAND UNLOADER 1/4 M x 1/8 F |
MCRCBM-HU95-115 |
95 |
115 |
1/4 Male |
1/8 Female |
MCRCBM-HU145-175 |
145 |
175 |
| |
PILOT VALVE WITH HAND UNLOADER 3/8 F x 1/4 F |
MCRCL-HU125-150 |
125 |
150 |
3/8 Female |
1/4 Female |
MCRCL-HU145-175 |
145 |
175 |
| |
PILOT VALVE WITH HAND UNLOADER (Typically Used on Quincy Compressors) 1/4 F x 1/4 F |
MCRCQ-HU100-110 |
100 |
110 |
1/4 Female |
1/4 Female |
MCRCQ-HU180-200 |
180 |
200 |
| |
PILOT VALVE WITH DUAL CONTROL 1/4 F x 1/8 F |
MCRCBDC95-115 |
95 |
115 |
1/4 Female |
1/8 Female |
MCRCBDC145-175 |
145 |
175 |
| |
PILOT VALVE WITH DUAL CONTROL 3/8 F x 1/4 F |
MCRCLDC100-125 |
100 |
125 |
3/8 Female |
1/4 Female |
MCRCLDC145-175 |
145 |
175 |
***Other Cut In, Cut Out Settings Available. Consult Midwest Control. |
Typical Applications
- Actuating a Throttle Control to Slow Down and Speed Up an Engine
- Opening and Closing a Discharge Valve to Vent Air to Atmosphere
- Operating the Intake Unloaders in the Compressor Head
Dual Control - Hand Unloader
- The Hand Unloader is Typically Used to Manually Unload the Compressor
- Dual Control is Typically Used on Electric Compressors to Select From Stop Start to Constant Speed Operation
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Typical Dual Control
The DC Dual Control is Used On Electric Compressors to Select Start/Stop or Constant Speed Control |
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