Brake pneumatic valve and butterfly valve analysis 1)

a brake pneumatic valve, pneumatic valve adjustment to the water supply network, in order to reduce casing depth, large diameter pipe matching butterflies, a little effect on the depth of overlying soil, seeks to form a complete set of pneumatic valves, lead to the bank in diameter around considering the circumstances. Use from in the past decade, the pneumatic butterfly valve failure than higher, so the conditions allow, expand the use of pneumatic valve is a problem. （ ） Pneumatic valve
in recent years, a lot of pneumatic valve manufacturers, research and development of general pneumatic soft sealing gate valve, this is more than the traditional double wedge or parallel pneumatic valve type pneumatic valve has the following characteristics: a: pneumatic soft sealing gate valve pneumatic valve, pneumatic valve cover precision casting castings used for bodies and formed the basic of mechanical processing, do not use environmental protection seal copper deposit of non-ferrous metal. Bay in soft sealing gate no pit at the bottom of the pneumatic valve, no matter accumulation, slag pneumatic valve opening and closing the failure rate is very low. Angle of pneumatic valve plate size uniform, soft seal rubber lining are interchangeable. Therefore, pneumatic soft sealing gate valve will be happy to provide the form of industry. Domestic manufacturing pneumatic soft sealing gate valve mm in diameter, but most of the factories manufacturing type mm in diameter, the process of domestic manufacturing, there are a lot of problems, from the inspection situation, pneumatic valve manufacturing company, is the body with the domestic casting resin sand casting molding is delegated, soft seal disc import foreign companies. The company believes, is the key components of the pneumatic valve pneumatic soft sealing gate valve plate lining rubber, rubber lining and high technical requirements of pneumatic valve plate not all foreign manufacturers, are usually purchased by factory assembly quality and reliable. Internal soft sealing gate pneumatic valve copper nut block is embedded in the pneumatic valve plate lining rubber suspension, similar structure, pneumatic valve nut block the activity of the friction tends to divest rubber lining pneumatic valve plate. Foreign companies pneumatic soft sealing gate valve, copper nut block is embedded in the door rubber lining, form the whole body, to overcome these shortcomings, but the pneumatic valve cover and concentric pneumatic valve requirements. Pneumatic soft sealing gate valve open and close, not closed die, as long as the sealing effect can be achieved for a long time, otherwise it is difficult to open or rubber lining. Pneumatic valve manufacturing company in shandong province in pneumatic valve inspection and pressure test, use the torque wrench, the degree of closed control, pneumatic valve water company operating personnel should also be more open and close way to imitate.