Screw Air Compressor Spare Parts Pressure Regulator for Sullair
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 |
Copper Alloy ,Stainless Steel |
The Sullair 045099 Pressure Regulator is a precision-engineered control valve designed to maintain optimal discharge pressure in Sullair rotary screw air compressors. Built from premium copper alloy material, this regulator provides exceptional thermal conductivity, corrosion resistance, and long-term dimensional stability. Its refined internal mechanism ensures consistent air supply, reducing system wear and improving compressor efficiency even under high-demand conditions.
This component plays a vital role in stabilizing the balance between compressor load and system pressure — a key factor for reliable air delivery and energy-efficient operation in industrial environments.
Function and Operating Principle
The 045099 regulator is positioned between the compressor’s airend discharge and the air receiver system. It operates through a dynamic diaphragm-controlled valve that automatically opens or closes in response to pressure fluctuations within the system.
When system pressure rises beyond the preset limit, the regulator gradually reduces air inlet flow, preventing over-compression. Conversely, when pressure drops, it increases airflow to maintain a constant delivery rate. This self-adjusting control loop minimizes unloading cycles, enhances motor efficiency, and reduces mechanical stress on critical parts.
Thanks to its sensitive pressure feedback design, the regulator responds rapidly to even slight changes in demand, ensuring a smooth, pulsation-free air output.
Material Composition and Design Features
The copper alloy body of this regulator is one of its defining strengths:
- Superior Corrosion Resistance: Effectively resists oxidation and water vapor corrosion, extending service life in humid or oil-rich environments.
- Excellent Thermal Conductivity: Copper’s natural ability to dissipate heat helps stabilize internal temperature, ensuring steady operation over long duty cycles.
- High Sealing Integrity: Precision-machined threads and tight-tolerance valve seats ensure minimal air leakage, even under high pressure.
- Enhanced Fatigue Strength: Copper’s ductility prevents cracking or deformation after thousands of opening-closing cycles.
Internally, the regulator integrates a stainless-steel spring and resilient diaphragm membrane, designed to maintain elasticity under continuous load and temperature stress. The combination of these materials provides an optimal balance of responsiveness and longevity.
Performance and Technical Highlights
- Fast Response: Internal valve assembly reacts instantly to changing flow demand, keeping downstream air supply smooth and balanced.
- Temperature Range: Performs reliably between -10°C and +120°C.
- Leak-Proof Design: Multi-layer sealing architecture minimizes micro-leakage and enhances efficiency.
- Maintenance-Friendly Construction: Easily accessible diaphragm and valve core for quick inspection or seal replacement.
This makes it particularly suitable for continuous-duty compressors operating in demanding workshops, manufacturing plants, and pneumatic systems.
Compatibility and OEM Replacement
The Sullair 045099 regulator is a direct-fit replacement for original Sullair rotary screw air compressors, ensuring full functional equivalence without adjustment or modification.
✅ OEM Part Number: 045099
✅ Compatible with some Models: Sullair LS Series, ES Series, and other equivalent screw compressor systems
✅ Connection Type: Standard threaded fitting, plug-and-play installation
Its universal interface design ensures a secure and leak-free connection, supporting both horizontal and vertical installation orientations.
Quality Control and Testing
Before shipment, every regulator is subjected to a multi-stage inspection process that includes:
- Pressure calibration and stability testing
- Leakage verification under 1.5× rated pressure
- Temperature cycling test to confirm sealing integrity
- Flow regulation accuracy assessment
- Visual inspection for machining quality and surface finish
All units meet or exceed Sullair OEM performance specifications, guaranteeing dependable field performance.
Installation and Maintenance Guidelines
- Ensure all connecting pipelines are clean before installation to avoid contamination.
- Apply moderate torque when tightening fittings to prevent thread damage.
- Periodically inspect the diaphragm and spring for signs of fatigue or contamination.
- Replace the regulator if irregular pressure fluctuations occur or leakage is detected.
- For optimal performance, install in an upright position and keep the air pathway dry and clean.
Proper maintenance will help extend the service life and preserve consistent compressor output quality.
Why Choose Our Replacement Pressure Regulator
Our replacement 045099 regulator delivers OEM-level precision and durability at a more competitive cost.
Each unit is produced under strict machining tolerance control, ensuring excellent repeatability and consistent pressure management. The use of premium copper alloy enhances resistance to corrosion and fatigue, providing reliable operation in long-term, high-pressure environments.
It’s an ideal choice for compressor distributors, maintenance professionals, and end users seeking performance, reliability, and cost-effectiveness.
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