Core types and functions:
For different models and control requirements, they are mainly divided into the following categories:
Intake regulating valve: Installed at the intake port of the main unit, it regulates the amount of air entering the main unit through a butterfly valve or slide valve structure. It is fully opened during loading to provide the maximum intake; it is closed during unloading or partial load to reduce the intake volume and lower energy consumption.
Pressure maintaining valve: Located at the outlet of the oil-gas separator, it ensures the establishment of the minimum working pressure (usually 4-5 bar) in the system, ensuring smooth lubricating oil circulation and stabilizing the downstream pressure.
Capacity regulating valve: Used for capacity regulation of screw machines, it can achieve 0-100% or stepwise (such as 50%, 75%) load regulation to adapt to the demand for air volume fluctuations and avoid frequent loading/unloading.
Electronic proportional regulating valve: In variable frequency models, it is linked with the control system and adjusts the opening degree in real time based on the pressure signal, achieving precise pressure control (error ±0.1 bar).
Key advantages of original factory parts:
Precise matching: Fully compatible with air compressor control systems (such as Elektronikon controller), with fast response time (usually ≤0.5 seconds) and high adjustment accuracy.
Durable design: The valve core uses wear-resistant alloy or Teflon coating, and the sealing parts are resistant to oil and temperature (-20~120℃), capable of withstanding 16-25 bar working pressure, with a service life of over 8,000 hours.
Energy-saving features: Optimized flow channel design, with pressure loss ≤0.2 bar, reducing energy consumption by 3-5% compared to ordinary valves.
Safety protection: Built-in overload protection structure to avoid system overpressure or undervoltage caused by jamming.
Core parameters for model matching:
Selection depends on the air compressor series, power, and control method. For example:
GA series constant frequency machines mostly use mechanical intake regulating valves, while VSD variable frequency machines commonly use electronic proportional valves;
Small power models (such as GA5-15) have different valve diameters and drive methods from large power models (such as GA75-160).
When purchasing, provide:
Full model name (such as GA30VSD+ FF) and factory serial number;
Installation position of the regulating valve (intake end / oil-gas tank outlet);
Old valve part number (such as 1092004400) and control method (mechanical / electronic).
Suggestions for troubleshooting and replacement:
Common problems and solutions:
Stuck or leakage: Leading to unstable pressure and increased energy consumption, require disassembly and cleaning or direct replacement (it is recommended to replace the entire set to avoid matching problems between new and old components).
Decreased regulating accuracy: Mostly due to sensor or valve core wear, require replacement of the original factory kit and recalibration.
Installation precautions: After replacement, parameters need to be matched through the controller (such as setting pressure upper and lower limits) to ensure normal linkage with the system.
