H42W stainless steel vertical lift check valve
Check: check valve also known as a one-way valve or check valve, and its role is to prevent the media back in the pipeline. Pump water off the bottom valve check valve also belongs to class.
Opening and closing pieces by medium flow and the forces to open or close, to prevent backflow valve media called check valve. Check valves are automatic valves, mainly for one-way flow of media channels, the only allowed media to flow in one direction, to prevent accidents.
Check valve according to the structure of division, can be divided into the lift check valve, swing check valve and butterfly valve three. Lift check valve can be divided into two types of vertical and horizontal. Swing check valve is divided into a single type, double valve and valve type three. Butterfly valve for the straight-through, the above non-return valve can be divided into connection, flange connection and welding of three threads in the connection form.
H42W stainless steel flange of the vertical check valve normally closed, the pressure inlet medium in pipeline, and to overcome the spring force the valve open. When the inlet medium pressure lower than the export side, the valve spring seat and the valve closes to prevent backflow, medium, so check function.
Stainless steel flange of the vertical check valve as supported by the spring valve, so the use of vertical or horizontal installation.
Standard Specification for:
Design and manufacturing standards:
The structural length standard: GB/T 12221-2005
The connecting flange standards: GB/T 9113
Pressure - temperature rating: GB/T 12224-2005
Testing standard: GB/T 13927-2008