inimum pressure valve has the functions of opening/closing,pressure maintaining and backstopping,and offers stable and reliable performance.

MPV Minimum Pressure Control Valve

Model:MPV-40A

Orifice:40mm

Opering Pressure:4~5 Bar

Maximum Pressure:15 Bar

Working Medium Temperature:-20℃~+120℃

Working Environment Temperature:-20℃~+60℃

	Installation Parameters

A Minimum Pressure Valve (MPV) is a pressure-regulating valve that maintains a minimum pressure in a system, often used in rotary screw air compressors to ensure proper lubrication and protect the air-oil separator. At startup, the MPV is closed to allow pressure to build; once a preset minimum is reached, it opens to allow airflow while its built-in check valve prevents backflow at shutdown, ensuring consistent system operation and longevity.
How it Works
Startup: When the compressor starts, the valve is closed, allowing pressure to build within the air-oil separator.
Opening: As system pressure increases, it overcomes the spring force in the valve, causing it to open.
Full Flow: At normal operating pressure, the valve opens fully, allowing the compressor's output to pass through with minimal pressure loss.
Shutdown: If the system pressure drops below the preset minimum, the valve closes.
Check Valve Function: A separate, integrated check valve then closes to prevent air from flowing backward into the compressor during shutdown.
Key Functions
Oil Lubrication:
The MPV establishes a minimum pressure required for lubricating oil circulation in the compressor.
Component Protection:
It prevents compressor damage and ensures the air-oil separator functions correctly by avoiding excessively low pressure.
Smooth Operation:
By maintaining a stable pressure, the MPV prevents issues like cavitation and contributes to the smooth operation of hydraulic and air systems.
Symptoms of a Faulty MPV
Low oil pressure or low temperatures.
Odd compressor noises.
System instability or inefficienc

NINGBO SANMIN IMPORT & EXPORT CO.,LTD. was established in 2014.Our company is mainly engaged in instrumentation, pneumatic and hydraulic industry accessories and services, has more than 10 series of core products.Focusing on the production of automatic machinery to provide a variety of options, products have a wide range of applications.

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