Structural characteristics of axial flow check valve

1. The shock-absorbing spring is designed to avoid vibration and noise caused by the direct impact between the valve disc and the valve body when the ordinary check valve is opened.

2. The valve seat adopts the combined sealing structure of hard sealing and soft sealing, which has the effect of noise reduction and shock absorption, which is convenient for users to overhaul on site.

3. Compact structure, beautiful appearance and small size.

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

The working principle of axial flow check valve

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

If the fluid flow pressure cannot support the valve at a large opening and maintain a stable opening position, the valve disc and related moving parts may be in a state of continuous vibration. In order to avoid premature wear, noise or vibration of moving parts, the size of the check valve is selected according to the fluid state.

The disc of the axial flow check valve is light in weight, which can reduce the friction force on the guide surface and return to the seat quickly. The low-mass, low-inertia disc travels a short stroke and contacts the seat surface with minimal impact. This can reduce damage to the seat sealing surface and prevent seat leakage.

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