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Same request; we also use screw compressors here.

2.1 Principles of the production process: The instrumentation and air for the factory are supplied by an air compression station. This station is equipped with 2 screw air compressors of the LS25S-300LWCKT model, which are driven by motors. Each unit is equipped with its own post-treatment equipment system, where compressed air is filtered through precision filters, dehydrated, and dedusted to produce clean compressed air meeting the required standards. This compressed air is used as the instrument air required for the normal operation of the entire plant’s systems. 2.2 Equipment Overview: This is a low-noise, fixed-screw compressor designed for power applications, featuring a single stage, oil injection, air/water cooling, and motor-driven operation. The unit is mainly composed of components such as the main engine, electric motor, oil-gas separator, oil cooler, aftercooler, and unit base, and it is enclosed within a sound-insulating enclosure; an electrical control cabinet is located on one side of this enclosure. Inside the compressor housing, there is a pair of precisely machined, intermeshing rotors, with the male rotor having four teeth and the female rotor having six teeth. The motor drives the male rotor through an elastic coupling, which in turn causes the female rotor to rotate at high speed as well. As the volume between the teeth continues to decrease, the air drawn in from the air filter is continuously compressed, resulting in an increase in pressure. When the volume between the teeth becomes connected to the compressor’s exhaust port, the compressed air is discharged from that port and enters the oil-gas separator for separation of oil and gas. The gas, after oil and gas separation, passes through the minimum pressure valve, rear cooler, and drain valve in sequence before being discharged outside the machine for use by the customer. The separated lubricating oil settles at the bottom of the oil-gas separator; under the effect of pressure difference, it returns to the working chamber of the main engine after being cooled, where it is reused in a circular process. 2.3 Starting of the instrument air compressor 2.3.1 Connect the power supply before starting, and turn on the oil heater. 2.3.2 Open the water inlet and outlet valves on the air cooler and oil cooler. 2.3.3 Open the root valves of the thermometer and pressure gauge on the buffer tank to check that the instruments are functioning properly. 2.3.4 Open the inlet and outlet valves of the primary and secondary filters, and close the bypass valve. 2.3.5 Open the upstream and downstream shut-off valves of the dust removal filter after it is opened, and close the bypass valve. Open the manual shut-off valve on the system pipeline. 2.3.6 Notify the dispatch to supply high and low voltage power, start the instrument air compressor, and pay attention to the stability of the electrical system. 2.3.7 Start the compressor by pressing the start button. After startup, the compressor will operate in unloaded mode, and the automatic operation indicator light will turn on. Once it is operating stably, the compressor will run under the set pressure. At this time, it is important to pay attention to the operating condition of the compressor unit. 2.3.8 The regenerative dryer is put into operation when the compressor outlet pressure reaches 0.4 MPa. 2.3.9 Check the operation of the dryer control program and whether the valve status is normal. 2.3.10 After the system is operating normally, conduct a thorough inspection to ensure that the units, pipelines, and valves are all in good condition with no leaks. 2.4 Planned shutdown 2.4.1 Notify the dispatcher to shut down the air compressor. 2.4.2 Press the instrument air compressor shutdown button on the control panel, and the compressor will stop after operating under unloaded conditions. 2.4.3 Close the manual shut-off valve on the pipeline from the instrument air compressor to the downstream system. 2.4.4 Deactivate the dryer control program. 2.4.5 Open the compressor exhaust valve to relieve pressure in the compressor. 2.4.6 Close the water inlet and return valve on the air cooler and oil cooler. 2.5 Main process parameters of the instrument air compressor Name Normal value Alarm value Interlock value Remarks Compressor exhaust temperature 90°C 113°C 117°C Compressor shutdown Pressure difference of the compressor oil filter 0.14 MPa Replace the filter element Pressure difference of the compressor oil-gas separator 0.02 MPa 0.07 MPa Replace the filter element Compressor exhaust pressure 0.7 MPa 0.76 MPa Automatic unloading of the compressor Cooling water inlet pressure >0.2 MPa

Thank you, is there any more detailed information?