Product use   1. This valve is suitable for water and hot water pipes with temperature not exceeding 100 ℃, so that the air in the pipe can be completely discharged. 2. When installing double port exhaust valve, a protective valve and ball valve must be installed at the bottom to avoid water cut-off during inspection.   technical parameter Valve body and cover Cast iron, stainless steel, carbon steel Test items Floating ball 304 stainless steel, exhaust port, steel H59 brass working pressure 1.0MPa seal ring Nitrile rubber Sealing pressure 1.1MPa elasticity filature A3 Strength pressure 1.5MPa QB1 single port exhaust valve drawing              Screw thread dimensions Nominal diameter ZG Φ H 15 1/22'' 135 205 20 3/4'' 135 205 25 1'' 135 205 40 11/2'' 150 205 50 2'' 150 205 Flange dimensions Nominal diameter D D1 D2 Φ H 15 95 65 45 135 210 20 105 75 55 135 210 25 115 85 65 135 210 40 140 115 80 150 210 150 160 125 100 150 210