Check valves Hua Ying Valve DN50 - DN1500, etc.

A Swing Check Valve is a type of valve in which the opening and closing parts are a circular disc and depend on their own weight and the pressure of the medium to block the return flow of the medium. Rotary check valves have an inclined disc that rotates around the shaft and works similarly to lifting check valves. The check valve is often used as the bottom valve of the pumping device, which can prevent the backflow of water. The combination of shut-off valve and ball valve can play the role of protective insulation. The disadvantage is high resistance, poor sealing when closed.

• Swing Check Valve. Technical specifications (eng).

The leak-free self-sealing check valve has a hinged design that reduces the number of connecting bolts of the housing itself in conditions of high pressure and large diameter, increases the reliability of the valve and overcomes the influence of the weight of the system on normal operation.

• Self-sealing check valve (Pressure Seal Check Valve). Technical specifications (eng).

Axial check valve (Axial Flow Check Valve). The opening and closing of the disc is determined by the pressure difference between the inlet and outlet ends of the valve. The disc opens when the inlet pressure is high and the outlet pressure is the sum of the force of the circulating spring. As long as there is a pressure difference, the disk is always open, but the opening depends on the pressure difference.

• Axial check valve (Axial Flow Check Valve). Technical specifications (eng).

The Double Plate Check Valve belongs to the category of automatic valves, mainly used for one-way flow of the medium through the pipeline, allow the medium to flow in only one direction to prevent emergencies.

• Double Plate Check Valve (Dual Plate Check Valve). Technical specifications (eng).