Air Compressor Minimum Pressure Valve Wholesale
High-performance Minimum Pressure Valve for oil-injected screw air compressors. Precision brass construction, stable pressure control, and long-lasting sealing ensure reliable lubrication and efficient compressor performance.
| Application |
Air Compressor |
|---|---|
| Material |
Aluminum ,Stainless Steel |
The Minimum Pressure Valve (MPV) is a critical safety and control component in oil-injected screw air compressors. It ensures that the system maintains sufficient internal pressure for stable oil circulation and airend lubrication before air is released into the downstream system. This valve also functions as a one-way check mechanism, preventing reverse airflow and oil migration during compressor shutdown or unloading.
Engineered for high precision and durability, our MPV is manufactured using CNC-machined brass alloy housing with stainless steel internal components and high-performance seals. It offers long-term resistance to oil mist, high temperatures, and pulsating pressure conditions typical of heavy-duty compressor applications.
Functional Principle
When the compressor starts, the airend begins to generate compressed air mixed with oil vapor. However, the system must first reach a minimum working pressure—usually between 4 to 5 bar—before air can flow into the network.
At this stage, the Minimum Pressure Valve remains closed, keeping the pressure inside the oil separator tank. This ensures proper oil return to the compressor’s lubrication circuit.
Once the pressure exceeds the calibrated value, the valve opens gradually, releasing compressed air smoothly to the downstream line. When the compressor unloads or stops, it closes automatically, preventing air and oil from flowing backward into the separator or airend.
This controlled operation stabilizes the system pressure, minimizes wear on mechanical seals, and protects key components from oil starvation or cavitation.
Technical Features
1. High-Precision Brass Body
The valve body is made of forged brass or high-grade aluminum alloy, offering a perfect balance between corrosion resistance, machinability, and thermal stability. Each housing undergoes surface passivation treatment to enhance oxidation resistance and maintain dimensional accuracy even after long exposure to compressed air and oil mist.
2. Optimized Flow Channel Design
The internal flow passages are carefully contoured using computational fluid dynamics (CFD) analysis. This design minimizes turbulence and pressure loss, ensuring efficient air delivery while maintaining stable opening characteristics across varying flow rates.
3. Advanced Sealing Technology
The MPV uses fluorocarbon (FKM) and PTFE composite seals, capable of withstanding continuous operation under temperatures up to 200°C and exposure to synthetic compressor oils. The dual-sealing structure ensures zero leakage even under fluctuating pressure cycles.
4. Precision-Calibrated Spring Assembly
A stainless steel compression spring, pre-calibrated to maintain constant opening pressure, guarantees consistent response under different load conditions. The spring undergoes heat treatment and stress relief to prevent fatigue and maintain long-term stability.
5. Smooth Piston and Bore Interface
Both the piston and bore are CNC-polished to a mirror finish, reducing friction and preventing sticking or delayed response. This precise fit ensures consistent valve movement and long-term reliability under continuous duty cycles.
Performance Advantages
- Stable Internal Pressure: Ensures sufficient pressure for oil lubrication and cooling during compressor startup.
- Reliable Non-Return Function: Prevents reverse flow of air and oil when the compressor stops.
- Low Flow Resistance: Optimized passage design minimizes energy losses and pressure drop.
- Extended Service Life: High-quality materials and precise tolerances enable continuous operation exceeding 100,000 cycles.
- Temperature & Corrosion Resistance: Ideal for harsh operating environments with high thermal loads and oil mist exposure.
- Maintenance Friendly: Modular internal design allows easy disassembly, inspection, and cleaning without damaging seals.
Application Scenarios
This minimum pressure valve is widely used in:
- Oil-lubricated rotary screw air compressors
- Industrial compressor systems with automatic load/unload control
- Energy-efficient compressed air systems requiring stable pressure management
- OEM replacement for major brands such as Atlas Copco, Ingersoll Rand, Sullair, Kaeser, and others
Its design meets the performance requirements of both stationary and portable compressor units operating in high-duty industrial environments.
Quality Assurance & Testing
Each valve is subjected to a rigorous quality control process:
- Leakage Test: Ensures zero leakage under 15 bar pressure for 30 minutes.
- Opening Pressure Calibration: Set and verified using precision pressure sensors with ±0.1 bar accuracy.
- Thermal Endurance Test: Simulates 2000+ hours of high-temperature operation.
- Cycle Test: Confirms valve reliability for over 100,000 open-close cycles.
All valves are serialized and batch-traceable to maintain quality consistency and service reliability.
Why Choose Our Minimum Pressure Valve
Our valves are developed with an engineering-first approach — combining meticulous material selection, precision machining, and functional testing to match or exceed OEM standards. Whether for direct replacement or system upgrade, our MPV ensures optimal pressure balance, long service life, and minimal maintenance downtime.
We are dedicated to supplying reliable compressor spare parts that protect your system efficiency and operational safety.
MAECENAS IACULIS
Vestibulum curae torquent diam diam commodo parturient penatibus nunc dui adipiscing convallis bulum parturient suspendisse parturient a.Parturient in parturient scelerisque nibh lectus quam a natoque adipiscing a vestibulum hendrerit et pharetra fames nunc natoque dui.
ADIPISCING CONVALLIS BULUM
- Vestibulum penatibus nunc dui adipiscing convallis bulum parturient suspendisse.
- Abitur parturient praesent lectus quam a natoque adipiscing a vestibulum hendre.
- Diam parturient dictumst parturient scelerisque nibh lectus.
Scelerisque adipiscing bibendum sem vestibulum et in a a a purus lectus faucibus lobortis tincidunt purus lectus nisl class eros.Condimentum a et ullamcorper dictumst mus et tristique elementum nam inceptos hac parturient scelerisque vestibulum amet elit ut volutpat.
