According to the conditions of use, valve can be all-metal structure, also can be in disc shelves embedded rubber mat or rubber ring. Through the up and down as the valve is in the same way, fluid type check valve of the channel is narrow, because this through up and down type check valve pressure drop than the swing check valves are bigger, and swing check valve flow limit rarely. Check valve is to rely on the media flow itself, and semi-automatic valve opening and closing, used to avoid the media flow Industrial Valves, also called a non-return valve, check valve, backflow valve, and the back pressure valve. Swing check valve in the absolute open state, the fluid pressure is almost not affected by blocking, because of the pressure drop through the valve is relatively small. Check valve can also be used to give the pressure there could rise to more than the pipeline system pressure of the help system supply supplement. For more than one pump in parallel is suitable for the high pressure pipeline system, using more MaoJian check valve water hammer problems. Check the office of the unique local load change is big, open-close frequency is small, a into the closed or open situation, suit to use cycle is long, and does not require device movement. , check Industrial Valves can also be used to give where the pressure is likely to rise to more than the main system of the help system supply supplement on the pipeline. In order to ensure the disc can often to the seat to the appropriate location, in disc preset hinge agencies, in order to have enough plug valve kai xuan space, and true, all aspects of the valve and valve seat contact. Check valve on the basis of the material is different, can be suitable for use in a variety of media on the pipeline. In order to avoid the water in the pipe hammer hidden danger, far to many people in the presupposition of check valve, a little think right and use the new structure, new materials, in the protection of the check valve is suitable for use at the same time, the performance of minimize the impact of the water hammer has won a good development. Check valve used for pipeline system, its main effect is to avoid the media counter-current, avoid pump and its pattern in reverse driving voltage, and the discharge of the vessel within the media. Q: stainless steel wafer check valve office principle a: stainless steel wafer check valve is also called as stainless steel valve, check valve, backflow valve, non-return valve, stainless steel stainless steel stainless steel back pressure valve, check valve, stainless steel cover stainless steel and stainless steel swing check valves up and down type check valve. Stainless steel check valve installed in the pipeline, that is, into a full line of fluid components, one of the Industrial Valves opening and closing process will be affected by it in system is influenced by transient flow condition; The disc in closing, in turn, the nature of the special utility and production of fluid flow situation develop. Water hammer is one of the pressure transient flow in the pipeline pressure wave, it is because of the change of pressure pipeline fluid velocity and actuating pressure rises jump or decline of hydrodynamic impact phenomena. Check the main can be divided into swing check valve ( In accordance with the center of gravity rotating) With up and down type check valve ( Move along the axis) 。 Apart from this check valve can be freely up and down, the remaining local is like by the valve in the same way, the fluid pressure from the valve seat tightly closed surface lift, medium return cause disc to seat, flow and truncation. Check valve belong to a kind of semi-automatic valve, its main effect is to avoid the media counter-current, avoid the pump and drive motor reversal, the discharge of the medium and vessels. This product is the utility of the type of valve is only allowed to medium flows in one direction, and stop the flow direction. The inside stainless steel wafer check valve is belong to this type of valve, it covers the swing check valve and up and down type check valve. General office of the valve is semi-automatic, flow in one direction under the effect of fluid pressure, valve open; In the opposite direction of fluid flow, the fluid pressure and the disc from the overlap of disc utility in the seat, so blocking flow. But once again 'switch' requirements, be sure to move the flexibility of the requirement of the more common mechanical movement is more bitter. Wafer check valves have the structure length is short, big and small light weight, the disc to close rapidly, water hammer pressure is small, amidst the runner, fluid resistance small, level pipeline or straight pipe can be used, convenient installation, acuity, tightly sealed performance is good, the disc short trip, close the valve impact is small, simple and compact closely, modelling beautiful, use fixed number of year of the survival of long, high reliable sex, avoid medium counter-current, semi-automatic stem and other advantages. Most scores for valves in practice, qualitatively identified for quickly closed, and in the check valve is closed at the moment of medium is a direction, with the disc in closing, media from the maximum current speed rapidly-changing down to zero, the pressure is a sudden rise, namely the initiation may have damage on piping system utility 'water hammer' phenomenon. The physical comprised of initiation is not compressibility of fluid, fluid motion inertia and a pipeline of elastic and comprehensive utility results at last. Up and down type check valve disc is located in the body seat tightly closed surface. Stainless steel wafer check valve is to rely on the pipe flow initiation of mass media itself and semi-automatic opening and closing of the force, semi-automatic valve belongs to a kind of Marine valves. 。 Swing check valve with the humble hinge institutions, there is a door the same disc freely on heel seat appearance. All the disc can be made from metal, can also be embedded in the metal, animal skins, while the use of synthetic rubber, or thought fit cover surface, the decision on the use of performance requirements.
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