check overview

check valve is also called or a one-way valve, its purpose is to prevent the backflow medium pipeline. The bottom valve of the pump suction off also belong to the check valve class. Open-close part by medium flow and power to open or closed, to prevent the backflow medium valve check valve. Check valve belong to automatic valve class, one-way check valve is mainly used for medium flow line, only allowed to medium flows in one direction, in order to prevent accidents. Check valve according to its structure, can be divided into the lift check valve, swing check valve and butterfly valve. Lift check valve can be divided into vertical check valve and horizontal non-return valve two kinds. Swing check valves can be divided into single type check valve, double disc type check valve check valve and valve type 3 kinds. Butterfly check valve for straight-through non-return valve, the above several kinds of check valve in the connection form can be divided into the thread connection check valve, flange connection check valve and check valve welding of three.

check valve installation should pay attention to the following things:

1, do not make the check valve in the line to bear weight, large check valve shall be independent support, make it not influenced by the pressure caused by the piping.

2, pay attention to the medium flow direction when installation shall conform to the valve body by the ticket direction arrow.

3, vertical elevating disc check valve should be installed in vertical pipe runs.

4, elevating disc check valve should be installed in horizontal pipe runs.

check valve nominal pressure or pressure, PN1. 0 - 16. 150 - 0 mpa, ANSI类 900、JIS10- 20 k or nominal diameter diameter: DN15 ~ 900, NPS 1/4 ~ 36 connection mode: flange, butt welding, thread, socket and other applicable temperature: - Material: 196 ℃ ~ 540 ℃ body WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8, 304). 、CF3( 304L) 、CF8M( 316). 、CF3M( 316 l) 、Ti。 Choose different material, the check Industrial Valves can be respectively suitable for water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea, and other media.

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