... . Special design, high flow rate and low flow resistance.6. Suitable medium: water, sewage, sea water, air, steam, food, medicament ... , oils, acids, alkalis, salts etc. No leakage under the rated pressure.Performance:Nominal Diameter: ... 2.5Testing pressure (water) Ps (MPa) Body seat: 1.5 times rated pressure Seat test: 1.1 times rated pressure Lug Butterfly Valve