The Main Function of the Check Valve

One, the use of wafer check valve:

The check valve is installed in the pipeline system, and its main function is to prevent the medium from flowing back. The check valve is an automatic valve that depends on the pressure of the medium to open and close. The wafer check valve is suitable for various pipelines with nominal pressure PN1.0MPa~42.0MPa, Class150~25000; nominal diameter DN15~1200mm, NPS1/2~48; working temperature -196~540℃, used to prevent The medium flows back. By selecting different materials, it can be applied to a variety of media such as water, steam, oil, nitric acid, acetic acid, strong oxidizing media, and uric acid.

Two, the main material of the wafer check valve:

There are carbon steel, low-temperature steel, duplex steel (F51/F55), titanium alloy, aluminum bronze, INCONEL, SS304, SS304L, SS316, SS316L, chromium-molybdenum steel, Monel (400/500), 20# alloy, Hastelloy, and other metal materials.

Three, standards and specifications of the wafer check valve:

1. Design and manufacturing: API594, API6D, JB/T8937, JB/T3595,

2. Structure length: API594, API6D, DIN3202, JB/T8937, ANSI/ASME B16.10

3. Pressure and temperature rating: ANSI B16.34, DIN2401, GB/T9124, HG20604, HG20625, SH3406, JB/T74

4. Test and inspection: API598, JB/T9092, GB/T13927

5. Piping flange: JB/T74~90, GB/T9112-9124, HG20592~20635, SH3406, ANSI/ASME B 16.5, DIN2543-2548, GB/T13402, API605, ASMEB16.47

Four, the structural characteristics of the wafer check valve:

1. The structure length is short, and its structure length is only 1/4~1/8 of the traditional flange check valve

2. Small size and lightweight, 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. Both horizontal pipes and vertical pipes can be used, easy to install

5. Unobstructed flow path and low fluid resistance

6. Sensitive action and good sealing performance

7. The disc has a short stroke and a small closing impact

8. The overall structure is simple and compact, and the appearance is beautiful

9. Long service life and reliable performance

The role of the check valve in the pump water supply system is to prevent the impact of the high-pressure water backflow on the pump impeller. During the operation of the system, when the pump suddenly stops running for some reason, the pressure in the pump disappears, and the high-pressure water connected to the outlet of the pump will flow back to the pump in reverse. When the pump outlet is equipped with a check valve, it will be closed immediately to prevent the high-pressure water from flowing back to the pump.

The role of the check valve in the hot water system is to prevent hot water from flowing back into the pipeline. If it is a PVC pipe, it is likely to burn the pipe and even hurt people, especially in the solar water heater system.

The above information is provided by the valve supplier.