Dual port exhaust valve

Dual port exhaust valveMainly composed of valve body, valve, upper cover, valve stem, floating ball, exhaust nozzle, etc.

Working principle:
When it is necessary to discharge gas from the pipeline, the valve stem should be rotated counterclockwise to make the valve stem and valve rise, so that the air in the pipeline enters the body cavity under the pressure of water and is discharged from the exhaust nozzle. With the water in the pipeline filling the body cavity, the floating ball moves upward under the buoyancy of water to block the exhaust nozzle and achieve self sealing. During normal operation of the pipeline, the air in the water is continuously discharged into the upper part of the body cavity of the exhaust valve under the pressure, forcing the floating ball to descend and leave the original sealing position. At this time, the air is discharged from the exhaust nozzle, and the floating ball returns to its original position for self sealing. Therefore, the exhaust valve is always open during normal operation, and the floating ball repeats the above process. Action: The air is continuously expelled. When maintenance or cleaning of the body cavity is required, the valve should be closed. This exhaust valve is closed when the valve stem is rotated clockwise.

Purpose and main performance specifications: This valve is suitable for discharging all air inside water and hot water pipelines with a temperature not exceeding 100 ℃. ⑴ Note: For pipelines with a diameter greater than 350mm, please choose a single port exhaust valve (QB1-10). ⑵ Install a dual port exhaust valve, and be sure to install a protective valve and ball valve (Q41F-16) underneath to prevent water interruption during inspection. If the purchaser requests any changes in the size of the exhaust valve flange, please indicate the flange connection size in the contract. This exhaust valve is suitable for pipelines with water, hot water, and a maximum temperature of 100 ℃, to completely exhaust the gas inside the pipeline. Main spare parts 1 2 3 4 5 6 7 8 9 10 valve body seal pad Valve disc Slotted set screws with cone point valve stem Hollow ball valve cover shim filler Exhaust gasket 11 12 13 14 15 16 17 18 19 Exhaust end cover nut protecting cover nut Specialized bolts Double headed stud Packing gland nut Double headed stud Main appearance and connection dimensions of dual port exhaust valve and ball valve model Nominal diameter Dg model Nominal diameter Dg QB2-10 40 Q41F-16 40 QB2-10 50 Q41F-16 50 QB2-10 75 Q41F-16 75 QB2-10 100 Q41F-16 100 QB2-10 150 Q41F-16 150 QB2-10 200 Q41F-16 200 QB2-10 250 Q41F-16 250 QB2-10 300 Q41F-16 300 Main appearance and connection dimensions of dual port exhaust valve

model Nominal Diameter Main dimensions (mm) D D1 D2 L Z-φd medium Material QB2-10 40 145 110 85 430 4-φ18 water cast iron QB2-10 50 160 125 100 430 4-φ18 water cast iron QB2-10 75 195 160 135 470 4-φ18 water cast iron QB2-10 100 215 180 155 500 4-φ18 water cast iron QB2-10 150 280 240 210 540 8-φ20 water cast iron QB2-10 200 335 295 265 700 8-φ20 water cast iron QB2-10 dual port exhaust valve hourly displacement gauge specifications 50 75 100 150 200 m?/h 4-173 85-352 14-597 22-904 27-1145