Atlas Minimum Pressure Valve 1622052101 for Air Compressors 50-500 PSI
A Minimum Pressure Valve (MPV), also known as a Minimum Pressure Check Valve or Pressure Holding Valve, is an automatic, spring-loaded precision valve designed to maintain a pre-set minimum system pressure in a fluid power circuit. Its primary function is to prevent system pressure from falling below a critical threshold, ensuring optimal operation and protection of downstream components.
The MPV acts as a guardian of your hydraulic or pneumatic system. It remains closed until a pre-determined "cracking pressure" is achieved upstream. Once this pressure is reached and surpassed, the valve opens to allow full flow.
Its core purposes are:
- Maintain Load Holding: Prevents loads from dropping uncontrollably in cylinders or hydraulic motors due to pressure loss.
- Ensure Pump Lubrication: Keeps adequate pressure on lubricated pumps to prevent damage from running dry.
- Avoid Cavitation: Prevents vacuum conditions that can cause cavitation in pumps and actuators.
- Sequencing: Ensures actuators don't operate until minimum system pressure is available.
- Pressure Safety: Guarantees baseline pressure for critical system functions.
- Closed Position: Spring force holds valve poppet closed against its seat.
- Cracking Pressure: Upstream pressure overcomes spring force, valve begins to open.
- Fully Open: At operating pressures above set point, valve remains fully open.
- Re-closing: If upstream pressure drops, spring closes valve to preserve downstream pressure.
| Feature | Benefit |
|---|---|
| Precision Spring Setting | Accurate and reliable minimum pressure setting, customizable for specific needs |
| Low Pressure Drop | Full flow with minimal energy loss when open, improving system efficiency |
| Robust Poppet & Seat Design | Excellent sealing in closed position, ensuring zero leakage |
| Compact & Rugged Construction | Built to withstand high pressures and harsh environments |
| Optional Check Valve Function | Allows free reverse flow when certain pressure differential is met |
- Pressure Rating: Up to 5,000 PSI (350 bar)
- Setting Range: Adjustable from 50 to 500 PSI (3.5 to 35 bar)
- Port Sizes: SAE #4 to #12 (1/2" to 1-1/2" NPT)
- Fluid Compatibility: Mineral-based hydraulic oil, synthetic fluids, water-glycol
- Temperature Range: -20°C to 100°C (-4°F to 212°F)
- Mobile Machinery: Excavators, bulldozers, cranes, telehandlers
- Industrial Machinery: Injection molding machines, presses, metal forming equipment
- Pump Outlets: Mounted on piston pumps, vane pumps, gear pumps
- Hydraulic Circuits: Winch, brake, and motor circuits
- Test Rigs: Maintain baseline pressure in complex test circuits
- Superior Reliability: Hardened steel poppet and seat for perfect seal and long service life
- Easy Adjustment & Installation: Externally accessible adjustment screw for easy pressure setting
- Proven Performance: Rigorously tested under real-world conditions
- Global Support & Availability: Worldwide technical support network
To select the correct Minimum Pressure Valve for your application, please have the following information ready:
- Required Set Pressure Range (e.g., 150-200 PSI)
- Maximum System Flow (GPM or LPM)
- Maximum System Pressure (PSI or bar)
- Port Size & Type (e.g., SAE 10, 1" NPTF)
- Fluid Type & Temperature
Contact our engineering support team today for assistance in selecting the perfect MPV for your system.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.