Is a check valve needed at the fan outlet of the organic waste gas adsorption unit?

2022-11-18View Original

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Is a check valve needed at the fan outlet of the organic waste gas adsorption unit?

Reply #22022-11-19

The pressure difference before and after the fan is low, so there is no risk of backflow; therefore, a check valve is generally not required. However, in accordance with Article 5.7.7 of the \"Fire Protection Design Standards for Fine Chemical Enterprise Engineering\" (GB51283-2020), flame arresters must be installed at the inlet and outlet of fans used to transport explosive gases.

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