It means that when the opened valve is suddenly closed, due to the inertia of the pressurized water flow, a water shock wave is generated and has a destructive effect. This is the “water hammer effect” in hydraulics, that is, positive water hammer.

The arrow marked on the valve body is the recommended pressure-bearing direction of the valve, not the flow direction of the pipeline medium. The valve with two-way sealing function may not be marked with an indicating arrow, or with an arrow, because the valve arrow refers to the recommended pressure direction. It is better to have one direction in the left and right or up and down directions.

Valve leakage has become one of the main leakage sources in the device, so it is very important to improve the valve’s anti-leakage capability. To prevent valve leakage, it is necessary to master the basic knowledge of valve sealing parts to prevent medium leakage-valve sealing, this is the most important thing.Principle of valve sealing

when selecting the valve stem material, it is necessary to ensure that the industrial valve stem has sufficient strength, good impact toughness, and corrosion resistance at the specified temperature. The industrial  valve stem is fragile, so attention should be paid to the machining performance and heat treatment performance of the material when selecting it.

Diaphragm valve: refers to a flexible membrane or combined diaphragm installed in the valve body and bonnet, and the closing part is a compression device connected with the diaphragm. The valve seat can be a weir shape or a straight through type.

According to the purpose and function of the valve, it can be divided into

1.1 Shut-off valves (its role is to connect and cut off the medium in the pipeline, such as ball valves, gate valves, globe valves, butterfly valves and diaphragm valves);

1.2 Regulating valves (its role is to adjust the parameters of the flow and pressure of the medium, such as regulating valves, throttle valves and pressure reducing valves, etc.);

There are complete sets of water supply and drainage systems in the buildings we live in, and valves are inseparable. We will introduce you to the water supply system valve configuration scheme inside the building!

Water supply mode of building water supply system

Why the butterfly valve is called the butterfly valve? As the name implies, its key components are like a butterfly facing the wind and turning freely. The disc of the butterfly valve is a disc, which rotates around an axis in the valve seat. The size of the rotation angle is the opening and closing degree of the valve.

Compared with the rising stem gate valve, the no-rising stem gate valve of the same size has a smaller volume and an advantage in height. Because the stem thread is in the medium, the medium has a certain adverse effect on the stem and affects the thread life. If there are particles such as residues , It will also affect the opening and closing of the valve

The air release valve has three main functions (three functions).

1 , To discharge the air in the pipe when the pipe is just running with water
2 , When the pipe medium is emptied, the outside air is sucked into the pipe, to ensure the air pressure balance inside and outside the pipe.
3, When the pipeline medium is operating normally, a small amount of air in the medium can be discharged from the pipeline through the air release valve.