Swing check valve: A swing check valve consists of a valve body, a valve cover, a valve disc, and a rocker arm. The valve disc is disc-shaped and rotates around a pin shaft outside the valve seat channel.
The opening and closing principle of a rotary check valve relies on the action of fluid pressure and the self weight of the valve disc. The opening and closing method of the valve disc is rotational motion, and the inlet direction of the fluid should be on the side that can impact the rotation of the valve disc.
The closing element of a rotary check valve is a valve disc or disk with a diameter equivalent to the pipeline, suspended in the valve chamber. When the fluid flows forward, the valve disc opens under the action of fluid pressure, and when the pressure drops, the valve disc closes under the action of its own weight and the pressure of the backflow fluid. ”
Advantages of rotary check valve:

1. Material selection: Ductile iron material meets relevant domestic and international standards, with high quality, good mechanical properties, and corrosion resistance.
2. Good sealing performance
3. Wear resistant and high temperature resistant
4. Compact structure
5. Wide applicability
6. Easy to install, convenient for maintenance and repair
7. The valve disc closes quickly and the water hammer pressure is low.
8. Smooth flow channels and low fluid resistance.
9. The action is sensitive and the sealing performance is good.
10. Short valve disc stroke and low impact force when closing the valve.
11. Overall structure, simple and compact, with beautiful appearance.
12. Long service life and high reliability.
In summary, swing check valves play an important role in industrial fluid systems due to their unique design and excellent performance.