Screw air compressor refrigerated air dryers are mainly divided into two types: refrigerated and adsorption-type. The most common one is the refrigerated air dryer (referred to as a "cold dryer"), which is one of the post-processing equipment frequently used by many customers when operating screw air compressors. So, what exactly is the function of a refrigerated air dryer?     The prima...

In recent years, permanent magnet variable frequency motors have been increasingly applied in the air compressor industry, with their market share rising significantly. Permanent magnet air compressors have become mainstream products, and many users are replacing traditional fixed-speed (constant-frequency) air compressors with permanent magnet models. But why has the permanent magnet air compress...

In daily use of compression equipment, the cleaning of the equipment is of particular concern, as its proper operation directly impacts production efficiency. Therefore, the removal of dirt on related components is especially critical. For general air compressor radiators, the accumulated grime not only comes from oil residues exacerbated by temperature changes during compression but also from env...

1. Pre-Installation Testing Before installation, safety valves must undergo pressure resistance testing and leak-tightness testing to verify structural integrity and sealing performance. Only after passing these tests can calibration and adjustment proceed. 2. Setting the Opening Pressure On a gas test bench, adjust the load applied to the valve disc to calibrate the opening pressure: Lever-type s...

Coal enterprises are major consumers of electricity, with power consumption accounting for a significant portion of production costs. Studies indicate that equipment such as fans, water pumps, compressors, hoists, and gas drainage systems consume over 40% of the total electricity used in coal mining operations. The development of variable frequency drive (VFD) technology effectively addresses issu...

1. Pre-Start Preparation (1) Open the cooling water inlet valve and check whether the water supply to each stage of the cooler and cylinder is normal. (2) Verify that the oil level in the crankcase is within the specified range. (3) Ensure the inlet regulating valve is closed, the compressor outlet vent valve is open, and the air delivery valve is closed. (4) Confirm that electrical equipment is i...

The original motor used NU-type deep-groove cylindrical roller bearings, which allow axial movement of the motor. The inner ring of the bearing has retaining ribs on both sides, while the outer ring has none, permitting bidirectional displacement of the shaft relative to the bearing and accommodating elongation caused by thermal expansion. Additionally, the bearing clearance is relatively larger c...

Screw-type air compressors are designed with high-temperature protection functions. When the exhaust temperature exceeds 100°C, the temperature sensor activates the temperature switch, triggering an alarm and automatic shutdown, while the instrument panel displays an exhaust temperature reading above 100°C. The machine's built-in cooling mechanism involves injecting lubricating oil from the lower ...