A, the use of the clamped check valve
Check valve is installed in the pipeline system, its main role is to prevent the backflow of media, check valve is a kind of automatic valve that relies on the pressure of the medium to open and close. Clamp check valve is suitable for nominal pressure PN1.0MPa ~ 42.0MPa, Class150 ~ 25000, nominal diameter DN15 ~ 1200mm, NPS1/2 ~ 48, working temperature -196 ~ 540 ℃ of various pipelines, used to prevent the backflow of media. By choosing different materials, it can be applied to a variety of media such as water, steam, oil, nitric acid, acetic acid, strong oxidizing medium and uric acid.
Second, the main materials of the clamped check valve
Carbon steel, low-temperature steel, duplex steel (F51/F55), titanium alloy, aluminum bronze, Inconel, SS304, SS304L, SS316, SS316L, chrome-molybdenum steel, Monel (400/500), 20# alloy, Hastelloy and other metal materials.
Third, the standards and specifications of the clamped check valve
1、Design and manufacture: API594, API6D, JB/T8937
2, structure length: API594, API6D, DIN3202, JB/T8937
3、Pressure and temperature class：ANSI B16.34、DIN2401、GB/T9124、HG20604、HG20625、SH3406、JB/T74
4、Test and inspection：API598、JB/T9092
5, with pipe flange: JB/T74 ~ 90, GB/T9112-9124, HG20592 ~ 20635, SH3406, ANSI B 16.5, DIN2543-2548, GB/T13402, API605, ASMEB16.47
Fourth, the structural characteristics of the butt check valve
1, short structure length, its structure length is only 1/4~1/8 of the traditional flange check valve
2, small volume, light weight, its weight is only 1/4~1/20 of the traditional flange check valve
3、The valve flap closes quickly and the water hammer pressure is small
4, horizontal or vertical pipeline can be used, easy to install
5, smooth flow channel, small fluid resistance
6、Sensitive action, good sealing performance
7、Short stroke of valve flap, small closing impact
8, simple and compact overall structure, beautiful shape
9、Long service life, reliable performance