Axial flow check valves can be divided into sleeve, disk, ring, and other forms according to their disc structure.

In addition to the functions of general check valves, the axial flow check valve is also designed with shock absorbing springs. The combined valve seat sealing structure with hard seal and soft seal has the effect of noise reduction and shock absorption, which is convenient for users to overhaul on site. The unique axial flow shuttle structure has the advantages of small flow resistance, large flow coefficient and small size. It is suitable for pipeline systems such as oil, gas, water slurry and acidic corrosive media containing H2S+CO2, and is used to control the reverse flow of the medium.

Structural Characteristics

1. It is designed with shock-absorbing spring, which avoids the vibration and noise caused by the direct impact between the disc and the valve body when the ordinary check valve is opened.

2. The valve seat adopts a combined sealing structure of hard seal and soft seal, which has better sealing performance.

3. Compact structure, beautiful shape, small size.

4. Unique axial flow shuttle structure, small flow resistance and large flow coefficient.

Working Principle

The opening and closing of the disc is determined by the pressure difference between the inlet and outlet of the valve. When the pressure at the inlet port is greater than the sum of the pressure at the outlet port and the spring force, the disc opens. As long as there is a pressure difference, the disc is always open, but the degree of opening is determined by the size of the pressure difference. When the sum of the pressure at the outlet end and the spring force is greater than the pressure at the inlet end, the disc closes and remains closed all the time. Since the opening and closing of the disc is in a dynamic force balance system, the valve operates smoothly, without noise, and the phenomenon of water hammer is greatly reduced.

The axial flow check valve closes quickly and without impact. The disc with small mass and low inertia touches the seat surface with a very small impact force after a short stroke, which can keep the sealing surface of the valve seat in good condition and avoid damage. More importantly, it can minimize the formation of pressure fluctuations and ensure system safety.