American standard valves are API and ASME standard, ASTM, ASTM material standard; According to the American standard design, manufacturing, production and testing of the valve is called the American standard valve. American standard valve is a fluid conveying system in the control unit, a cut-off, regulation, guide, to prevent the reverse flow, voltage regulator, the leakage of the shunt or overflow, etc; Used for fluid flow control system of the valve, from the most simple of American standard cut-off valve to the extremely complex control system used in all kinds of American standard valve, its quite a wide varieties and specifications. The valve can be used to control air, water, steam, all kinds of corrosive medium, mud, oil, liquid metal and radioactive medium, etc. All types of fluid flow. About these common sense to know about American standard gate valve American standard gate valve this noun, many say not too clear, but speaking of disc set people are very familiar with, they both are one and the same. American standard gate valve it is a kind of used in oil, water and electricity, chemical industry and other fields in the realization of pipeline flow or cutting tools. Compared with general gate Industrial Valves, its sealing is stronger, switch more relaxed, seal gate valves of the elastic base seat is more compensation effect, effectively makes up the defect of the general valve sealing and rust. Start first, American standard valve parts is ram, ram movement direction and perpendicular to the direction of fluid flow in the piping, therefore the mark gate in the practical work often play is turned on and off the effect of fluid, and cannot be applied to adjust and throttling effect. Second, in the American standard gate valve is a pressure relief hole, in the use of the usual process to avoid the jams. A pressure relief hole is designed to prevent cavities of abnormal pressure in the body. When American standard gate valve in the closed its cavity exists in the body of low temperature medium, but with the passage of time, the media will continue to absorb heat at low temperature and gasification phenomena will happen, and after gasification medium volume swells and generate larger pressure, after stress accumulation will damage the valve and dangerous. And the effect of pressure relief hole is will this extra pressure discharge, the cavity pressure return to low temperature condition. Although American standard gate valve installation is simple, using range is wide, the pipe dielectric fluid resistance small, not disturbing, not limited to, and open and shut easily, but due to large dimension, open needs certain space, and prone to erosion between the sealing surface, after the failure of maintenance trouble, the people in the process of using or caution. What are the standard ball valve working principle and installation requirements of equipment as a kind of close to ball Industrial Valves, American standard ball valve in the pipeline, the main role in cutting, distribution and change the flow direction of medium. Although it belong to a type of valve with flange valves, but due to structural differences, they are on the working principle and installation requirements or is there a big difference. American standard working principle of ball valves in the process of opening, the ball valve closed at the beginning, because of putting pressure on the valve stem, a sphere is tightly pressed on the seat, when the handwheel anti-clockwise rotating body, at this point, the valve stem force and the sphere began to slowly away from the seat, when the stem continue to be pushed, the valve stem and valve stem spiral groove has a guide pin interaction, and make do frictionless rotating sphere, when to achieve the full open position, the valve stem reaches the limit, sphere achieved the full open position at the same time, now began to cut, distribution and change of flow direction of medium. In the process of closing, the whole operation process to present the opposite phenomenon, namely the anticlockwise turn the handwheel to let the ball to leave the seat do after rotation, to reach a certain occurs after the location of the pin function let stem and ball rotate 90 degrees and a half weeks, continue to put pressure on the basis of sphere and valve seat without exposure to rotate 90 degrees, the hand wheel rotation ball press in the seat. Beauty standard ball valve installed in the main points the standard ball valve is a strict procedure, this need professional personnel for installation, in order to guarantee the quality of the installation, make sure before installation protection cover was taken off at the ends of the flange, pipe residual impurities are clean, and near the pipe installation points not droop and under external force phenomenon. At the same time, even after installation of flange connecting bolt fastening. American standard ball valve working principle and installation is to introduce the key points, if there is demand, must find a professional manufacturer for purchasing, so as to ensure the quality.
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The major classifications of are os&y valve, y gate valve, resilient seated valve and resilient seal gate valve machines.