Water Sewage Pipeline Check Valve D600, Water Sewage Pipeline Check Valve D

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of the user's stove.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are changing rapidly, and the rankings may vary by time and region. For the latest ranking information, it is recommended to refer to industry reports, professional institutions or market research data for more detailed and accurate information.

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The pipe connected to the indoor pipe network behind the check valve of the fire pump adapter is filled with water and has a certain pressure.

Pipes with different water quality need to be equipped with check valves to avoid polluting the water quality of other pipelines when the pressure fluctuates.

For example, the fire protection system and water supply system, such as the empty spirit stove and the humidification pipe and water supply pipe, etc.

Butterfly check valve refers to a valve that automatically opens and closes the valve disc by relying on the flow of the medium itself to prevent the backflow of the medium, also known as check valve, check valve, reverse flow valve, and back pressure valve. The check valve is an automatic valve, and its main function is to prevent the backflow of the medium, prevent the pump and the drive motor from reversing, and the discharge of the container medium. Check valves can also be used on lines that supply auxiliary systems where pressure may rise above the system pressure.

Check valves can be mainly divided into swing-type check valves (rotating according to the center of gravity) and lifting check valves (moving along the axis).

The butterfly type is good, and there is no installation location requirement. It seems that the lifting type can only be installed on horizontal pipes.

I just bought one today, in a small hardware store on the edge of the community, 25 yuan.

Oh, I don't think it's sold online

The principle of the globe valve is also called the cut-off door, is the most widely used valve, it is widely popular, because the friction between the sealing surfaces in the opening and closing process is small, relatively durable, the opening height is not large, the manufacture is easy, the maintenance is convenient, not only suitable for low pressure, but also suitable for high pressure.

The closing principle of the globe valve is to rely on the pressure of the valve stem to make the sealing surface of the disc and the sealing surface of the valve seat fit tightly to prevent the flow of medium.

The shut-off valve allows the medium to flow in one direction only and is directional when installed. The structural length of the globe valve is greater than that of the gate valve, and the fluid resistance is large, and the sealing reliability is not strong during long-term operation.

There are three types of globe valves: straight-through globe valves, right-angle globe valves, and direct-flow inclined globe valves.

Globe valve structure.

The structure of the globe valve body is straight-through, direct flow and right-angle. Straight-through is the most common structure, but its fluid has the most resistance. The direct flow fluid has less resistance and is mostly used for fluids containing solid particles or high viscosity.

The right-angle valve body is mostly forged, which is suitable for shut-off valves with small passage and high pressure.

Check valves can be installed horizontally or vertically, but vertical installation must ensure that the liquid flow direction is bottom-up, and there are arrows in the direction of the fluid on the housing of the check valve.

There is a valve block inside the check valve, connected with a spring, when the positive flow, the liquid pressure is greater than the starting pressure, generally, that is, to overcome the spring elastic force, the valve block is jacked open, normal flow; In the event of backflow, the valve block will be pushed back by water to seal the valve. When the direction of the water flow is reversed, it is absolutely not okay, and the gravity of the water is easy to make the spring fail, and it cannot prevent the backflow.

However, the check valve can not absolutely guarantee to prevent backflow, in the strict requirements of the place, to use the backflow preventer, by two check valve clamp and an anti-fouling isolation valve, the rear end check valve fails, the block valve automatically drains water and pressure. The drawings are referred to the small instrument fascicle of the "General Atlas of Water Supply and Drainage".

The internal structure and operating principle of the waterproof hammer silencer check valve at the outlet end of the water system pipeline and water pump.

Quite simply, inside is a movable slider blocking the liquid inlet, when there is liquid fed from below, when the pressure is greater than the gravity of the slider, the slider is pushed open, and the liquid can flow. When entering from the opposite direction, due to the weight of the slider itself plus the pressure, the inlet is blocked, thus playing the role of one-way flow.

Therefore, check valves must be installed vertically.

Generally speaking, check valves are installed on horizontal pipelines, as long as you pay attention to the direction. Lifting check valves must be on the horizontal pipeline, in addition to swing type, spherical and so on depending on your working conditions to choose the valve.

However, it should be noted that in order to choose the correct check valve, the horizontal pipe should be lifted and pressed. Swing check valves are not an option, and swing check valves are suitable for vertical pipes. Although butterfly check valves can be installed on horizontal lines, they are rarely used due to their poor sealing performance.

It can be installed, and there is a horizontal check valve, which is installed on the horizontal pipeline.

Any centrifugal water pump, the inlet water level must make the impeller completely submerged in the water, because it relies on centrifugal force to transport the water out, and the centrifugal force is related to the gravity of the conveyance, the gravity of the air is very small, and the centrifugal force generated is correspondingly small, so the water can not be transported out (the pressure generated is too small), so you are right, you need to replace the self-priming pump or move the pump to a place where the centrifugal pump pipeline can always ensure that there is a full pipe water level.

The suction bottom valve of the pump is not closed, can not ensure the check effect, often after the pump is stopped, the water in the suction pipe falls back into the pool, so the suction pipe is filled with air, and the "water diversion" needs to be poured to keep the impeller flooded. Small-bore pumps can also be activated to vacuum the pump instead of "filling and diverting water". The pump at the pumping station is a fixed complete device, so how can the pump be moved to a place where the centrifugal pump pipe can be kept at full level?

It is irrelevant whether or not to switch to a self-priming pump.

The suction stroke of the centrifugal pump is generally less than 9m, and the actual installation can be 7m, which requires the suction pipe to be filled with water before starting the machine.