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1. Minimum Design Pressure for Piping Fittings (1) High Pressure Type ⋅ Primary side (before shut-off valve or selector valve): 9.5 MPa ⋅ Secondary side (after shut-off valve or selector valve): 4.5 MPa (2) Low Pressure Type ⋅ 4.5 MPa 2. Operating Pressure of Safety Device Between Storage Vessel and Selector Valve or Shut-off Valve ⋅ Pressure between the Minimum Design Pressure and Maximum Allowable Pressure of the Piping The above content is updated. How to Purchase Textbooks https://cafe.naver.com/sobangview/11572 ABC Firefighting Official Cafe https://cafe.naver.com/sobangview