Hebei Zhongji Heavy Industry Valve Co., Ltd.  

Product Name: Air Vent Model NO.: Air Vent Certification: ISO9001 Material: Casting, Grey Iron Type: Compound Exhaust Valve Trademark: Zj Transport Package: Wooden Case Specification: DN40-DN500 Origin: Hebei, China Product Description Cast Ductile Iron Body Double Ball Orifice Flanged Air Vent Release Valve When the system has a gas overflow, gas along the pipe up, eventually gathered at the highest point of the system, and the exhaust valve is generally installed in the system, when the gas into the vent valve cavity gathered in the upper portion of the exhaust valve, with the increasing of the gas inside the valve, pressure rise, when gas pressure is greater than the system pressure, the gas can make the cavity of the water drops, buoy with water level drops, open the vent;When the gas is exhausted, the water level rises and the buoy rises with it, closing the vent.Similarly, when negative pressure is generated in the system, the water level in the valve chamber drops and the exhaust port is opened. At this time, the external atmospheric pressure is higher than the system pressure, so the atmosphere will enter the system through the exhaust port to prevent the harm of negative pressure.If the bonnet on the exhaust valve body is tightened, the exhaust valve stops exhaust and, normally, the bonnet should be in the open position.The exhaust valve can also be used together with the partition valve to facilitate the maintenance of the exhaust valve.The technical requirementsMain technical parametersA. The nominal pressure of the exhaust valve is PN10.B. Sealing test pressure is 1.1mpa.C. Strength test pressure is 1.5mpa.D. Water closing pressure of exhaust valve shall be ≤ 0.02mpa.E. The air closing pressure of the exhaust valve shall be ≥ 0.07mpa.F. The pressure test shall comply with the provisions of standard GB/T13927.G. Connection flanges shall comply with the provisions of STANDARD GB/T17241.6-98.H. Maximum working pressure up to 10bar.I. The maximum operating temperature (water) is about 110ºC.DimensionDN(mm)NPSΦH151/2"135205203/4"135205251"135205