What are the exhaust settings of the clean room?
The exhaust system should be set independently for the following situations. ①The mixing of the exhaust medium can increase the risk of corrosiveness, toxicity, combustion and explosion; ②The exhaust medium is toxic and non-toxic, and the toxicity is very different; ③Inflammable, explosive and general exhaust; ④Clean room exhaust When designing the system, the following technical measures should be taken. In order to prevent the outdoor air from flowing back into the room, causing pollution and dust accumulation, anti-backflow measures are commonly used: (1) Set up a medium-efficiency filter; (2) Use a check valve, which is easy to use but has poor sealing performance; (3) Use a closed valve with good sealing performance, But the structure is complex; ⑷ the use of automatic control devices and so on. The pharma machinery, pipes and accessories of the exhaust system shall be made of suitable materials, thermal insulation materials and coatings according to the nature and state of the exhausted gas, and shall generally meet the following requirements. ① The air duct of the exhaust system should be made of non-combustible materials. The non-combustible materials referred to here are various types of metal sheets, including carbon steel, stainless steel, and non-ferrous metal sheets. The selection should be determined according to the nature of the exhaust. ②The air duct for excluding corrosive gas should be made of corrosion-resistant and refractory material. The refractory materials referred to here are mainly glass fiber reinforced plastics with an oxygen index greater than 32. ③Accessories, thermal insulation materials, sound-absorbing materials and coatings are all made of non-combustible materials or flame-retardant materials. The non-combustible materials referred to here are mainly rock wool, glass wool, etc.; the non-combustible materials are mainly rubber-plastic sponges and polyurethanes with an oxygen index greater than or equal to 32. Previous: What are the grades of the clean room? Next: The positive pressure maintenance method of the clean room
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