Check valve used in the sewage riser, can be a good solution to the problems caused by sewage reflow. The drain pipe with the check valve installed can prevent the equipment from damaging the equipment and reduce the storage capacity of the equipment.
The purpose of the sewage riser is to draw the water that can not be discharged through the gravity flow through the strong pressure generated by the pump, and is used in the basement building. The basement sewage is drained through the drain pipe to the upper or near the sewage pipe, but the sewage riser stops running after the part of the sewage pipe is still no pressure began to return, because the sewage pipe is generally vertical up , The pressure generated by the return flow is huge, if the sewage falls directly into the equipment, it is likely to damage the equipment. The solution to the reflow problem is to install a check valve in the drain.
Check valve is to rely on the media itself and automatically open and close the valve, used to prevent the media back to the valve, also known as check valve, check valve, counter valve, and back pressure valve. Check valve is an automatic valve, its main role is to prevent the media back to prevent the pump and drive the motor reversal, and the container media discharge. The check valve can also be used on piping where the pressure may rise above the supply of the auxiliary system. Check valves should be installed horizontally in the pipeline.
Check valve used in the sewage riser, can be a good solution to the problems caused by sewage reflow. The role of the check valve is to allow the media to flow in one direction, to prevent reverse flow. It automatically work, in the sewage riser out of the sewage under the action of the fluid pressure, the valve flap open; water pump to stop the return of sewage, the fluid pressure and the valve from the self-acclimation valve flap in the valve seat, thus cutting the flow.
Check valves are used in sewage risers and are generally installed in the drain. The drain pipe with the check valve installed can prevent the equipment from damaging the equipment and reduce the storage capacity of the equipment.
Check valve, also known as one-way valve or check valve, its role is to prevent the medium in the pipeline back. Water pump off the end of the valve also belong to the check valve class. The opening and closing of the medium by the medium flow and the force to open or close itself to prevent the medium back valve called the check valve. Belonging to the automatic valve type, mainly for the medium flow of the pipeline, only to allow the media to flow in one direction to prevent accidents.
Check valve structure can be divided into:
First, lift check valve:
The check valve can be mounted on a horizontal pipe along the vertical centerline of the valve body. The ball valve can be used on a high pressure small diameter check valve. The shape of the valve body of the lift check valve is the same as that of the shut-off valve (which can be used with the globe valve), so its fluid resistance coefficient is large.
Second, the swing check valve:
The check valve is used to rotate the flap around the valve seat. The swivel check valve is more common.
Third, disc check valve:
A check valve that rotates around a pin in a seat. Disc-type check valve structure is simple, can only be installed in the horizontal pipe, the seal is poor.
Fourth, the pipeline check valve:
A valve that slides along the centerline of the valve body. Pipeline check valve is a new type of valve, its small size, light weight, processing technology is good, is one of the direction of development of the check valve. But the fluid resistance coefficient is slightly larger than the swivel check valve.
Installation should note the following:
1, in the pipeline do not make the check valve to bear the weight, large check valve should be independent support, so that the pressure generated by the impact of piping.
2, the installation of media flow direction should be noted that the direction of the arrow with the valve body should be the same direction.
3, lift vertical valve check valve should be installed in the vertical pipe.
4, lift the level of the valve check valve should be installed in the horizontal pipe.