Air Inlet Valve of screw compressor,normally opened,is designed to open and closeby 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-65B-L
Orifice:65mm
Maximum Pressure:15 Bar
Working Medium Temperature:-20℃~+120℃
Working Environment Temperature:-20℃~+60℃
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 orrestricting airflow based on the pressure difference inside and outside the chamber. By modulating airflow, inlet
valves also help manage motorload 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 thechamber 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 thechamber increases
, closingthe 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 inletvalve, 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
pressuredrops 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.
Q: Could you offer the free samples ?
A: Yeah, but it depends products, Pls contact us ina@pneuhydr.com or whatsapp 0086 15168536055
Q: What ' s your business scope ?
A: Our business scope is service of exporter automation parts with full container, and sell air cylinder , air source treatment , solenoid valve , air valve, motorize valve , Brass valve, hydraulic valve, hydraulic cylinder, air and oil fitting, pressure gauge etc .
Q: What types of products you can make ?
A: We can make many kinds of stainless steel, brass ,aluminum materials processing .like high pressure Valve / solenoid valve / electric valve / water valve/pneumatic valve/air cylinder/hydraulic valve/hydraulic accumulator products and so on .
Q: Can the product be made with our logo and brand ?
A: Yes , of course , we can make . we are OEM supplier for years and professional to make . But you need give us the authorization if it is possible .
Q:Can you provide original famous pneumatic and hydraulic,instruments brand goods ?
A: Yes,We can supply like Festo,Smc,Ckd,Burket,Hydac,Rexroth,Siemens,Rosemount,Marsh ,Endress+Hauser etc.
Q: Is there a warranty available?
A: Yes, normally products is one year quality guarantee.
Q: Is the connector in British or Metric system? What is the difference between PT, NPT, and G threads?
A: The G thread is cylindrical and does not seal itself, requiring additional gaskets to prevent leakage. PT and NPT are conical, and the internal and external threads become tighter and tighter when tightened. Sealing is achieved through the deformation of the threads, and sealant or tape is usually used in conjunction to enhance the sealing effect
G-thread is a cylindrical straight pipe used for non sealed connections; PT thread is a conical tube that relies on the deformation and sealing of the thread itself; NPT is also a conical tube with a tooth profile angle of 60 degrees, mainly used in North America
Q: How to convert pressure units: MPa, bar, psi, kg/cm ²?
A: 1MPa=10bar≈145psi≈10kg
Q:What usually causes the burnout of solenoid valve coils?
A:Incorrect voltage and hz, frequent switching, pilot head entering liquid,valve core and spring problem,environment hot,heavy vibration etc.
Q: What should be noted for pneumatic components in high temperature or extremely cold environments?
| Focus Point |
High Temperature Environment Countermeasures |
Extreme Cold Environment Countermeasures |
| Seals |
Fluororubber, PTFE |
Low-temperature nitrile, silicone rubber, polyurethane |
| Lubrication |
High-temperature synthetic grease (low volatility) |
Low-temperature grease (low pour point, low viscosity) |
| Air Supply Treatment |
Strengthen cooling, efficient water removal |
Ultra-low dew point drying (refrigeration + adsorption type), heat tracing |
| Metal Components |
Reserve expansion clearance |
Select materials with low-temperature toughness, prevent leakage due to cold shrinkage |
| Control Components |
High heat-resistant grade coils, heat dissipation, low power consumption |
Install insulation boxes, local heating, prevent cold condensation |
| Installation |
Keep away from heat sources, add heat insulation plates |
Avoid exposure to wind and snow, wrap with thermal insulation materials |
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