Where is good or vent valve plant Hangzhou Tiandun principle editor when the system has a gas spill, the gas pipeline will follow to climb, final gather at the highest point of the system, while the exhaust valves are generally installed in the system the highest point, when gas into the exhaust valve gathered in the upper valve chamber exhaust valve, with the increase of the gas valve, the pressure rises, when the gas pressure is greater than the system pressure, the gas chamber will decrease the water, the float is lowered together with the water level, opening the exhaust air intake; after gas drained, the water level rises, the float will also rise, close vents. By the same token, when a negative pressure system, the water drop in the valve chamber, the exhaust port is opened at this time due to the external atmospheric pressure than the system pressure, so that the atmosphere will enter the system through the vent, to prevent harm to the negative pressure. Tighten the exhaust valve if the valve bonnet on, stop the exhaust vent, under normal circumstances, should the bonnet is open. You can also cut off the exhaust valve with a valve supporting the use of the exhaust valve for easy maintenance. 2 Features editor 1. exhaust valve float low density of PPR and composite materials, this material is even a long soak in the hot water is not deformed. Buoy activity will not cause difficulties. 2. Leverage the use of hard plastic floats, buoys and bearing connection between the lever and have adopted active connection, it will not rust in the long run, result in the system not working and leakage occurs. 3. The seal face part is the use of spring-loaded lever may be retractable with the corresponding movement of the lever, without the exhaust gas to ensure the sealing. Installation: When installing the exhaust valve, installed along with the best cut off valve, so that when you need to remove the exhaust valve maintenance, to ensure a closed system, the water will not drain. Low-density PP material, this material even if prolonged immersion in hot water does not produce a variant. When starting operation method editor water pipe, plugs stuck in the open position, extensive venting, when the air is drained, the water inside the valve, the float is lifted, the drive plugs into a closed position, stopping a lot of exhaust, When the normal water delivery pipe, if a small amount of air is gathered in the valve to a considerable extent, the water level dropped valve, float fall, when the air is discharged from the hole, when the pump is stopped, the water inside the tube or in case of an empty tube When negative pressure, then quickly turned plugs, intake air to ensure complete pipeline. Overall single ball composite exhaust valve (with water) pressure rating: PN10 Nominal Diameter: DN25-100mm (DN25 for screw-type, the rest is flanged) separate composite exhaust valve (water sewage shared) pressure rating : PN10 nominal diameter: DN250-300mm overall double ball-type composite exhaust valve pressure rating: PN10 Nominal Diameter: DN250-300mm 5 technical requirements of the main technical parameters ① edit a nominal pressure of the exhaust valve PN10.. b. Sealing test pressure 1.1MPa. c. the strength test pressure 1.5 MPa. d. the exhaust valve closing pressure water should ≤0.02 MPa. e. the exhaust valve closed air pressure should ≥0.07 MPa. f. Pressure testing shall comply with standard GB / T13927 in. g. Flange shall conform to the standard GB / T17241.6-98 of. h. The maximum operating pressure up to 10bar. i. The maximum operating temperature (water) about 110 ℃. ② performance requirements a. Exhaust valve should be larger displacement, empty pipe when the pipe filled with water to achieve rapid return to normal water supply capacity of the exhaust in a very short time. b. exhaust valve in the pipe negative pressure generated when the piston should be able to quickly turn quickly inhaled a lot of outside air to ensure that the pipeline will not cause harm because of negative pressure. And at the operating pressure in the pipe can be assembled slight amount of air is discharged. c. the exhaust valve should be closed relatively high air pressure, in a relatively short time before the Pistons closed, there should be sufficient capacity to discharge the air inside the pipe is completed, improve water efficiency. d. exhaust valve closing pressure of the water should be less than 0.02 MPa, at a lower water pressure can close the exhaust valve, thereby avoiding a large number of water gush. e. the vent should be made of stainless steel float (floats) for the opening and closing parts. f. the vent valve should be equipped with anti-shock protection of the inner tube, after a lot of exhaust to prevent the direct impact of high-speed water float (floats) and cause the float (floats) premature damage. g. For DN≥100 exhaust valve structure is adopted by a large number of exhaust valve and exhaust valve automatically composed to suit the requirements of the pipeline pressure. Auto exhaust valve lever mechanism should be used to re-enable the float buoyancy can be greatly magnified, and the closure of low water level, water impurities difficult to contact the sealing surface, vents are not blocked, it can greatly improve the performance of anti-clogging. While under high pressure conditions, due to the complex role of the afterburner lever, so the float can be synchronized and water levels drop, opening and closing the valve member is not like a traditional high pressure suck, so normal exhaust. h. For high flow rates, frequent start the pump, diameter DN ≧ 100 conditions, to mitigate the impact of the water, the vent should be installed buffer plug valve. Buffer plug valve should be able to prevent a lot of water but does not affect a large number of exhaust, so water efficiency is not affected, and effectively prevent water hammer occurs.