Cleanroom Refrigeration Pipeline Purge Leak Detection

Cleanroom Refrigeration Pipeline Purge Leak Detection

It is required that no debris is allowed in the refrigeration system. After the installation work is completed, the entire system must be blown with compressed air to blow out the iron filings, sediment, and floating dust existing in the system; The sewage outlet is selected at the lowest point of the system, using a pressure of 0.6MPa...

Text label: clean clean room modular system, refrigeration pipeline purging and leak detection, clean clean room modular engineering

Cleanroom Refrigeration Pipeline Purge Leak Detection

It is required that no debris is allowed in the refrigeration system. After the installation work is completed, the entire system must be blown with compressed air to blow out the iron filings, sediment, and floating dust existing in the system; Select a sewage outlet at the lowest point of the system, and use dry compressed air or nitrogen with a pressure of 0.6MPa to purge. All valves are open during purging, except for the safety valve, a small amount of debris will remain in the valve, and the valve core will be removed after cleaning to keep the system clean; the system blowing gas can be controlled by the valve, or wood can be used The method of plugging the sewage outlet is controlled. When the method of plugging the outlet with a cork is used, the cork can be blown off when the gas pressure reaches 0.6MPa, and the cork should be prevented from rushing out; The valve core of the valve in the system is removed and cleaned.

The clean clean room modular refrigeration system is a closed system composed of refrigeration equipment, valves and pipes. In order to ensure its tightness, the system must be leaked. The refrigeration system leak detection includes system air tightness test and system vacuum test. Refrigeration After the system is cleaned, the air tightness test of the whole system including refrigeration equipment and valves should be carried out; after the air tightness test of the system is qualified, the gas in the system must be evacuated before filling freon, otherwise the refrigeration system will not work normally , Another function of vacuuming is leak detection. If the gas in the system has not been exhausted, or the pressure will rise quickly after evacuation, it means that there is still a leakage point in the system, and further pressure leak detection should be carried out. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for clean rooms and clean workshops.

After passing the leak test of the refrigeration pipeline, the low-pressure side pipelines and equipment of the system can be insulated. The pipelines working under evaporative pressure and the chilled water or salt water pipelines must be insulated. 50mm is adopted. In order to facilitate operation and management, different colors should be painted on the outer surface of all pipes or the outer surface of the insulation layer, or the arrow of the flow direction of the surface medium should be drawn for easy distinction. For systems with Freon as the refrigerant, compressed nitrogen in steel cylinders is often used. When there is no nitrogen in steel cylinders, compressed air can also be used, but it must be dried before charging into the refrigeration system; after charging for 24-48 hours, observe that the pressure value does not drop. It is qualified; for the fully enclosed and semi-hermetic compressors and the Freon refrigeration system composed of large compressors, the compressor cannot be used for vacuuming, but the nitrogen bottle should be replaced with a vacuum pump for system vacuuming.

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