What's the difference between check valves and non-return valves?
Other check valves (check valves), such as blowdown check valves,Civil air defense explosion-proof valve and liquid use of the principle of the check valve is very similar.
2, gravity: and spring similar to rely on the valve's own gravity closed to prevent backflow.3, swing type: liquid through the valve body, relying on the pressure to open the side of the rotating valve flap,After the pressure is lost, the disc depends on its back weight and the reverse liquid pressure seals the disc.
Check valves are check valvesThe check valve is only a one-way start and stop valve to prevent the flow of fluid medium on all kinds of pipelines or equipment.Check valves are widely used and come in many different types,The following is a common check valve for water supply and heating:1, spring: the liquid from the bottom up, rely on the pressure spring controlled valve,After the pressure disappears, the spring force presses down the disc and seals the liquid back.Often used in the smaller diameter check valve.
