Air Inlet Valve of screw compressor,normally opened,is designed to open and close by signal input and offers internal pressure discharge,automatic air compensation and backstopping,and has the merits of stable performance,high

efficiency and energy saving.

JQF Intake Control Valve

Model:JQF-40B-K

Orifice:40mm

Maximum Pressure:15 Bar

Working Medium Temperature:-20℃~+120℃

Working Environment Temperature:-20℃~+60℃

	Installation Parameters

An air compressor inlet valve, also called an intake valve, acts as a gatekeeper to control the amount of air entering the compression chamber, regulating the compressor's capacity and efficiency. It opens during the suction stroke and closes during the compression stroke, allowing or restricting airflow based on the pressure difference inside and outside the chamber. By modulating airflow, inlet valves also help manage motor load and ensure proper oil flow for airend lubrication.
How it Works
Suction Stroke: As the piston moves down (in a reciprocating compressor) or the rotor turns (in a screw compressor), the pressure inside the chamber drops. This pressure difference causes the inlet valve to open, allowing atmospheric air to enter.
Compression Stroke: When the piston moves up or the rotors turn in the opposite direction, the pressure inside the chamber increases, closing the inlet valve.
Unloading: During the unloading phase, the inlet valve closes to prevent air from entering the compressor. This reduces the load on the motor, allowing it to run without any load.
Loading: During the loading phase, the inlet valve opens to allow air into the compressor.
Key Functions
Airflow Regulation: The primary function is to control the volume of air that enters the compressor.
Efficiency and Performance: It directly impacts the compressor's capacity and power consumption.
Motor Load Management: By controlling air intake, it helps manage the load on the compressor's motor.
Lubrication: It ensures sufficient oil flow is available to lubricate the airend components.
Types
Reed Valves: A common type made of flexible metal strips (reeds) that open and close in response to pressure differentials.
Feather Valves: Used in reciprocating compressors, these consist of a valve seat with a port and a flexible steel "feather" that acts as the inlet valve, opening and closing to control air flow.
Maintenance
Inlet Filter: An air inlet filter should always be installed at the intake to prevent contaminants from entering the system, which can cause pressure drops and reduce efficiency.
Valve Maintenance Kits: Manufacturers often provide maintenance kits with replacement parts for valves, as worn or malfunctioning valves can significantly increase power consumption and decrease the compressor's lifespan.