• 8072471a shouji

What is a PVC check valve? How to use PVC check valve?

What is a PVC check valve?

"PVC check valve is also known as a check valve, check valve, check valve, or check valve. Its function is to ensure the directional flow of the medium in the pipeline without backflow. The bottom valve of the water pump suction pipe also belongs to the check valve. valve."


What is the working principle of PVC check valve?

A check valve refers to the valve that automatically opens and closes the valve flap by relying on the flow of the medium itself to prevent the backflow of the medium, also known as a check valve, one-way valve, reverse flow valve, and back pressure valve. the discharge of the container medium. Check valves may also be used on lines supplying auxiliary systems where the pressure may rise above system pressure.

The purpose of this type of valve is to allow the medium to flow in only one direction and prevent flow in the opposite direction. Usually, this kind of door works automatically. Under the action of fluid pressure flowing in one direction, the valve disc opens; when the fluid flows in the opposite direction, the fluid pressure and the self-coincident valve

Among them, the check valve belongs to this type of valve, which includes the swing check valve and lifts check valve. Swing check valves have a hinge mechanism and a door-like disc that rests freely on the sloping seat surface. In order to ensure that the valve disc can reach the proper position of the valve seat surface every time, the valve disc is designed in the ammonium chain mechanism, so that the valve disc has enough swing space and makes the valve disc truly and comprehensively contact the valve seat. The disc can be all made of metal. Metals can also be inlaid with leather, rubber, or synthetic overlays, depending on the performance requirements. In the fully open condition of the swing check valve, the fluid pressure is almost unimpeded, so the pressure drop across the valve is relatively small. The disc of the lift check valve is located on the sealing surface of the valve seat on the valve body. The valve is like a globe valve except that the valve can be lifted up and down freely. The fluid pressure lifts the valve disc from the seat sealing surface, and the backflow of the medium causes the valve to fall back to the valve seat and cut off the flow. According to the conditions of use, the disc can be of all-metal structure, or it can be in the form of a rubber pad or rubber ring embedded in the disc holder. Like the globe valve, the passage of the flow through the lift check valve is also narrow. Therefore, the pressure drop through the lift check valve is larger than that of the swing check valve, and the flow of the swing check valve is less restricted.

In daily life, discarding items and wastes in the main sewer pipe (drain pipe) causes the pipe to be blocked. When the daily wastewater of the upstairs neighbors flows into the blocked main sewer pipe, there will be a backflow problem. When the upstairs neighbors concentratedly discharge wastewater into the sewer pipes, the air in the pipes will be compressed, which will create pressure on the water supply in the traps connected to the main sewer pipes on the lower floors, resulting in the problem of water backflow.


So how to solve it, I hope the following methods can help you!

1. Hammond bonnet rotatable u-type set
2. PVC glue
3. Hand saw
1. Check valve principle: The check valve opening and closing parts are opened and closed by themselves by the flow and force of the medium to prevent the backflow of the medium. The valve is called a check valve. flow in one direction to prevent accidents. Therefore, it is also called a one-way valve and a check valve. The reverse water valve of the pipeline is automatically closed to play a non-return effect, thereby solving the problem of reverse water in the sewer
2. First, we spliced the u-type version suit according to the schematic diagram of the u-type version check valve, do not apply glue first, the side of the check valve with the arrow is facing up, and the direction of the arrow represents the direction of the water flow, clean the check valve. When the union is unscrewed, the check valve can be removed. (If it is a horizontal tube, just replace an elbow directly, which is convenient for connection)
3. It depends on whether the installation space is enough. The size of the u-type set is 35*32*20. The accessories of the check valve set are scattered parts, which can be flexibly adapted according to the installation environment of your own home. See if there is enough space, and after confirming that it is correct, you can apply glue to install the check valve, and it cannot be changed after adding water to dry.


1. The check valve should be installed horizontally and horizontally
2. The side with the arrow should face up
3. The direction of the arrow represents the direction of water flow

How to buy PVC check valve?

HONGKE Valve specializes in manufacturing plastic valves and plastic bathroom accessories for 13 years. We will provide you with the most cost-effective products. Contact us to get a professional PVC check valve quotation.

Post time: Jun-07-2022