DN40~DN900 Nominal Pressure: PN1.0/1.6 MPa Mediums: water, sewage etc Temperature: -10~90 Standard:Design standard conform to: ... close automatically to avoid accidents.1. Tightly sealed, without leakage under the water pressure testing.2. Economical, light weight, compact design-significantly ... (MPa):1.0, 1.6, 2.0, 2.5Testing pressure (water) Ps (MPa)Body seat: 1.5 times rated pressureSeat test ...