Atlas Copco ZT55-90 series air compressor's check valve stem adjustment kit 1. Kit composition and function
Core components: Usually include valve stem adjustment bolts, locking nuts, positioning washers, sealing rings, and dedicated adjustment tools. Some kits may also come with valve stem wear detection gauges or calibration scale templates.
Main function: By adjusting the stroke, position or preload of the valve stem, ensure that the opening degree of the intake valve matches the compressor operating conditions (such as loading pressure, unloading pressure) precisely, avoiding abnormal intake volume, pressure fluctuations or increased energy consumption due to valve stem jamming or stroke deviation.
2. Compatibility characteristics
Designed specifically for the ZT55-90 series screw air compressors, matching the valve stem diameter, stroke parameters and adjustment mechanism structure of this model to ensure the stability and accuracy of the adjustment process.
Component materials (such as high-strength steel, oil-resistant seals) adapt to the oil mist and temperature environment inside the compressor (usually -10 to 120℃), avoiding rust or failure of the adjustment components.
3. Inspection and adjustment scenarios
Regular maintenance: It is recommended to use this kit to check for wear, bending of the valve stem, or jamming caused by carbon deposits during the 2000-3000-hour operation or annual maintenance of the unit, and re-calibrate the stroke.
Troubleshooting: When the air compressor experiences slow loading, inability to reach the set pressure, frequent unloading or abnormal increase in energy consumption, it may be due to improper valve stem adjustment or wear, and this kit should be used for detection and adjustment.
After replacement calibration: After replacing the intake valve assembly or valve stem component, it is necessary to use the adjustment kit for precise positioning to ensure that the clearance between the valve stem and the valve core, spring, etc. conforms to the original factory standards.
4. Operating points
Adjustment steps: According to the maintenance manual of the ZT55-90 model, first release the system pressure, remove the intake valve end cover, change the valve stem extension length through the adjustment bolt, and observe the pressure response during loading / unloading through the pressure gauge until the set parameters are reached.
Locking and fixing: After adjustment, use the locking nut to fix the valve stem position to prevent parameter deviation due to vibration during operation and replace the sealing washer to ensure no air leakage.
Tool compatibility: It is recommended to use the dedicated tools provided in the kit (such as torque wrench, positioning plug gauge) to avoid valve stem damage or insufficient adjustment accuracy due to incompatible tools.
