Structure and Advantages of Axial Flow Check Valves
Axial flow check valves are widely used in oil and gas pipelines due to their features of energy saving, noise reduction, low flow resistance, anti-hammering, and rapid opening and closing.
Structure
The axial flow check valve has a simple structure and is mainly composed of a valve body, a valve seat, a valve disc, a spring and a guide sleeve. The axial flow check valve determines the opening and closing of the disc by the pressure difference between the inlet and outlet of the valve. When the pressure at the inlet end is greater than the sum of the spring force at the outlet end, the valve disc opens; when the sum of the pressure at the outlet end and the spring force is greater than the pressure difference at the inlet end, the valve disc closes.
Advantages
1. Rapid opening and closing: the disc of the axial flow check valve has a short stroke, and the streamlined structure has low resistance, which can realize rapid closing.
2. No noise: The opening and closing of the disc are in a dynamic balance system; the valve operates in balance; the reverse flow speed is small at the moment of closing, and the spring reset makes the valve open and close without impact, reducing noise and water hammer effect.
3. Excellent sealing performance: the disc has light weights. The lightweight, low-inertia valve clack has little impact on the valve seat after being closed in a short stroke, which can effectively reduce the leakage caused by damage to the sealing surface of the valve seat.
4. Low operating energy consumption: The fluid flowing through the axial flow check valve only needs to overcome the spring force to fully open the valve. On the premise of fully ensuring the flow area, the operating energy consumption can be reduced to the greatest extent.
5. Small fluid resistance: the axial flow structure and the streamlined flow channel on the flow surface can ensure that the fluid is in a laminar flow state, so that the valve has a small flow resistance coefficient and saves energy.
6. Flexible installation: Compared with other types of check valves of the same size, the axial flow check valve has short length, light weight, small installation position, and can be installed horizontally, vertically and at any angle.