Check Valve Sealing Performance
Dec 22, 2017
Valves in the production of the application, we must pay attention to the sealing performance, lift check valve and folder check valve also need to pay attention to, like the lift check valve body and bonnet is sealed with a wound gasket Of the bolt flange connection, which is characterized by the main assembly and unloading is simple and convenient, and reliable.
If the length of the valve flap welding cost, if the cost of the premise, the need to improve the length of the welding, improved after the advantages of three: to meet the conditions of the guide, you can reduce the friction, so that it can be more convenient to open; Space to pressure relief; by improving not only for the product in favor, but also can save costs, this is the third advantage.
There is a sealed surface in the form of sealing from the surface seal to the line seal, this approach is because the spherical surface of the cone surface seal can not meet the expected sealing needs, so also need to use the reaming to dubbed Line seal, so that the product can meet the customer requirements of the sealing requirements.
Seal surface material valve design in the valve body and valve sealing surface is STL6, in these two although their application of the same material, but the hardness between them or there is a big difference, so that So that they have excellent wear resistance, anti-scratch performance, the use of good stability, so that you can prevent the emergence of the situation, better solve the practical problems.
Check valve according to different materials, different ways to connect can be divided into a variety of different, of which the more common high-pressure lift check valve, H72 on the folder lift type back, internal thread / socket welding vertical check valve, copper lift Type check valve, American standard power station swing check valve, brass thread swing check valve, sanitary level check valve and so on. Which is a stainless steel check valve is often used.
Stainless steel check valve is characterized by: load changes, opening and closing frequency is small, a closed or open state, the combined cycle will be very long, and does not require movement of sports parts. But once there is a switch request, it must be flexible operation, this requires more common mechanical movement more harsh.
Stainless steel check valve is divided into lifting stainless steel check valve, rotary stainless steel check valve, disc stainless steel check valve. It is used in the piping system, the main role is to prevent the media back to prevent the pump and its drive motor machine reversal, and the media medium discharge, but also for the pressure may rise to more than the main system of the auxiliary system to provide supply On the pipe.