Minimum Pressure Valve 02250097-598 for Oil-Injected Screw Air Compressor
The Sullair 045099 pressure regulator is designed for rotary screw air compressors. Made of high-quality copper alloy, it offers excellent corrosion resistance and precise pressure control. It is a direct replacement for the original factory part in select Sullair LS and ES series compressors, providing reliable, long-lasting performance.
| Application |
Air Compressor |
|---|---|
| Material |
Aluminum ,Stainless Steel |
The 02250097-598 Minimum Pressure Valve is a key safety and control component used in oil-injected rotary screw air compressors. Its primary role is to maintain a minimum system pressure during startup and operation, ensuring proper oil circulation and system lubrication. Without this valve, low pressure at startup could lead to insufficient oil flow, resulting in premature wear of bearings, rotors, and seals.
Designed with high-precision internal balancing and temperature-resistant sealing components, this valve guarantees both operational stability and long service life. It is fully compatible with multiple screw compressor systems and engineered for seamless replacement with original OEM parts.
Function and Working Principle
During compressor startup, the discharge pressure is typically too low to guarantee adequate oil return to the airend. The minimum pressure valve (MPV) remains closed until the discharge pressure reaches a preset threshold — usually around 4 to 5 bar. Once this level is achieved, the valve gradually opens to allow compressed air to flow into the system while maintaining sufficient oil circulation pressure within the compressor element.
Key functional phases include:
- Startup Phase: The valve stays closed to build up internal oil pressure.
- Pressure Holding: Once the threshold is reached, the valve begins to open proportionally to system demand.
- Full Operation: The valve remains partially open to balance flow and pressure, ensuring consistent air delivery.
- Shutdown Phase: The valve closes automatically, preventing backflow of compressed air into the oil separator tank.
This self-regulating mechanism keeps the air/oil separator protected from reverse flow and maintains a constant oil film on critical moving parts.
Construction and Material Features
The 02250097-598 valve is made from high-grade aluminum alloy and hardened stainless steel for corrosion resistance and structural stability under fluctuating temperatures and pressures.
- Aluminum Alloy Body: Provides lightweight yet durable construction, resistant to oxidation and oil corrosion.
- Stainless Steel Valve Core: Ensures smooth, precise movement and long-lasting sealing performance.
- High-Temperature O-Rings: Retain elasticity and sealing integrity even under continuous operation up to 200°C.
- Precision-Machined Surfaces: Guarantees tight sealing and minimal pressure loss during valve operation.
Each component undergoes CNC machining with micron-level tolerances to ensure leak-free operation and stable pressure response.
Performance Advantages
- Consistent Pressure Regulation: Maintains minimum discharge pressure within ±0.1 bar to ensure steady lubrication.
- Backflow Prevention: Prevents compressed air from returning to the separator tank after shutdown.
- Fast Response Time: Quickly adjusts to pressure changes, avoiding over-compression or unstable air supply.
- Extended Component Life: Protects bearings, rotors, and seals by ensuring reliable oil flow at all times.
- Low Maintenance Requirement: Simple internal structure allows easy inspection and cleaning during regular service.
This performance makes it indispensable for oil-injected rotary screw compressors operating in factories, workshops, and industrial production lines.
Installation and Maintenance Guidelines
To ensure optimal operation and service life, follow these recommendations:
- Clean All Connections: Before installation, clean the air piping and threads to prevent contamination.
- Correct Orientation: Install the valve in the correct direction of flow, typically marked with an arrow.
- Torque Control: Avoid overtightening connections to prevent thread or body damage.
- Periodic Inspection: Check the valve for oil residue or carbon buildup every 2,000–3,000 hours.
- Replace Seals as Needed: O-rings and diaphragms should be replaced if hardened or deformed.
- Functional Test: After installation, verify the opening pressure using a calibrated gauge.
Proper installation and maintenance ensure stable compressor operation and minimize unexpected shutdowns.
Compatibility and OEM Reference
✅ Part Number: 02250097-598
✅ Component Type: Minimum Pressure Valve (MPV)
✅ Applicable Systems: Oil-injected rotary screw air compressors (universal type)
✅ Function: Pressure holding, oil circulation protection, and air discharge control
✅ Installation Type: Threaded connection, direct OEM replacement
The valve can be used as a replacement for several major compressor brands that adopt equivalent system designs, ensuring full compatibility and consistent performance.
Quality Assurance and Testing
Each 02250097-598 valve undergoes a strict testing process before delivery:
- Hydrostatic pressure test to verify body integrity
- Opening pressure calibration to ensure correct operating threshold
- Leakage test under 1.5× working pressure
- Thermal endurance test simulating continuous high-temperature operation
- Functional flow test to confirm stable pressure regulation
All products meet international standards for compressor safety and durability.
Why Choose Our Minimum Pressure Valve
Our MPV is not only a replacement part — it’s an engineered performance solution designed for longevity, precision, and energy efficiency. Manufactured using high-quality materials and tight machining tolerances, it delivers reliability that matches or exceeds OEM performance standards.
By ensuring steady internal pressure, the 02250097-598 valve helps your compressor maintain clean, dry, and properly lubricated operation — reducing downtime, preventing costly repairs, and extending the overall service life of your air system.
MAECENAS IACULIS
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