The stop valve is also called a Check Valve, which prevents the backflow of media in the pipeline. The switch component uses the flow and power of the medium to automatically switch. The Universal Valve that prevents the backflow of the medium is called a stop valve. Stop valves are automatic valves that are mainly used on pipelines with one-way flow of media to allow one-way flow of media and prevent accidents. Suitable for clean media, not suitable for media containing solid particles and high viscosity.
The stop valve is suitable for nominal pressure PN1.0MPa~42.0MPa, class 150-250. Nominal diameter DN15~12mm, NPS1/2~48; used in various pipelines with operating temperature -196-540℃ to prevent medium backflow. By choosing different materials, it is suitable for various media such as water, steam, oil, nitric acid, acetic acid, strong acidic media and urea.
Main materials of stop valve: carbon steel, low temperature steel, duplex steel (F51/F53), titanium alloy, aluminum bronze, Inconel (INCONEL625), SS304, SS304L, SS316L, SS316L; chromium molybdenum steel, molybdenum steel (400 /500), 20 Ying alloy, lotus alloy and other metal materials.
Features of the stop valve: This valve is mainly composed of a valve body, a valve cover, a valve plate, a balance weight, a piston and a regulating valve. It is used in water supply and drainage pipelines and is installed at the outlet of the water pump to prevent medium backflow and fire-fighting destructive water hammer. It has the advantages of light valve disc, large opening, significant power saving effect, small fluid resistance, reasonable water hammer elimination structure, reliable sealing performance, wear resistance, long service life, smooth operation, no vibration, and no noise.
1. The structural length is short, and its structural length is only 1/4~1/8 of the traditional flange stop valve.
2. Small size and light weight, its weight is only 1/4~1/20 of the traditional stop valve
3. The valve disc closes quickly and the water hammer pressure is small.
4. Both horizontal and vertical pipes can be used and are easy to install.
5. Smooth flow channel and small fluid resistance
6. Sensitive action and good sealing performance
7. The valve disc stroke is short and the valve closing impact is small.
8. Overall structure, simple and compact, beautiful appearance 9. Long service life and high reliability.
