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HS41X anti-fouling isolation valve
- HS41X防污隔断阀 Category: HS41X anti-fouling isolation valve
- ￥ 面议 Price: ￥ Negotiable
Product introduction of HS41X antifouling isolation valve :
The backflow preventer (anti-fouling cut-off valve) is based on the current water supply pipe network, which causes serious pollution due to backflow; our unit introduces foreign advanced technology to develop and develop a new suspected hydraulic control valve that is safe and reliable to prevent backflow pollution of drinking water. To ensure the sanitation and safety of daily drinking to fill the gap in the domestic valve field.
Structure of HS41X antifouling isolation valve :
The valve is composed of a drain between two check valves. The upper cavity of the drain is connected with the inlet end of the first-stage check valve by a high-pressure hose. The first and second check valves are mainly composed of a valve body, a bonnet, a valve disc, a gasket, and a spring. The drain is mainly composed of valve body, valve cover, diaphragm, valve disc, sealing plate, valve core, valve seat, spring and so on. The ordinary type is formed by connecting two check valves in series without safety drainage.
Working principle of HS41X anti-fouling isolation valve :
Ordinary type: It is formed by connecting two check valves in series. When one of the seals is broken, the other two also serve as a seal to prevent backflow. However, after the three non-return seals were destroyed simultaneously, the non-return effect was lost. Its safety and reliability are relatively poor, and its working principle is relatively simple. Safety type: The anti-fouling isolation valve is added with a drain in the middle of the ordinary type, so that even if the two check valves seals are broken at the same time, the other can also play a role in preventing backflow pollution.
1. HS41X anti-fouling isolation valve
a. Clean municipal domestic water is supplied to users from the first-stage check valve through the drain to the second-stage check valve outlet. The high-pressure water at the inlet of the first-stage check valve enters the upper cavity of the drain diaphragm through the high-pressure hose, and under the membrane. The cavity is in communication with the outlet of the first-stage check valve and the inlet of the second-stage check valve. Due to a certain pressure difference, the valve flap is pushed down and the drain is closed to prevent the normal supply of the shut-off valve:
b. When there is no user in the pipeline behind the valve, the water is still. If the inlet pressure remains the same and there is a pressure difference before and after, the drain is still closed.
c. If the inlet pressure drops and the pressure difference between the front and back drops to a certain value, the spring pushes the valve flap upward, the drain opens and releases the pressure again, and when the pressure releases to a certain pressure difference with the inlet pressure, the drain closes again.
2. HS41X anti-fouling shut-off valve has failed. After the anti-fouling shut-off valve, the pressure of the pipe network rises. When the inlet pressure of the valve is exceeded, if the second check valve seal is intact and there is no leakage, the high-pressure water will not flow back. Poor, the drain is closed and no pressure is released. When the leakage of the second-stage check valve seal is broken, the pressure before the second-stage check valve of the ground increases, causing the pressure on the drain membrane to decrease and decrease, the drain opens, and the pressure is released; The check valve seal is broken at the same time. The high-pressure water flowing back from the second-stage check valve has been depressurized and decompressed, so the first-stage check valve will not flow backward.
3. HS41X anti-fouling shutoff valve water supply pressure The water supply pressure drops continuously, the pressure on the upper part of the drain diaphragm drops, and the safety drain control spring pushes the valve core to open the drain to drain water. When the inlet pressure drops to zero or negative pressure, the drain is completely opened, water is discharged, and air enters the vacuum chamber from the drain to prevent siphon reverse flow.
Material of main components of HS41X antifouling isolation valve :
Cast iron, ductile iron, cast steel
Cast iron, ductile iron, cast steel
Stainless steel, chrome vanadium steel
Five, HS41X anti-fouling isolation valve main shape connection size: unit: mm
Installation requirements and schematic diagram of HS41X antifouling isolation valve :
1. The anti-fouling isolation valve must be installed horizontally. The environment of the installation site should be clean and have sufficient maintenance space. The outlet of the safety drain or (air barrier) is more than 300mm from the ground, and it is not flooded by water or debris.
2. Drainage facilities shall be provided in the installation area.
3. A gate valve (butterfly valve) filter and a soft rubber joint (or retractor) should be installed before the valve, and a gate valve (butterfly valve) should be installed after the valve. The schematic diagram is as follows: (Figure 3, Figure 4)
Seven, HS41X anti-fouling isolation valve installation site:
1. Behind the household water meter for the water pipe network access user
2. Non-domestic water and sewage pipes are connected to domestic water pipes and installed at the beginning of the outlet pipes.
3. On the water inlet pipe of the drinking water tank (when water enters the bottom of the water tank).
4. When the pressure pump is connected in series to the drinking water pipe, it is installed on the pump suction pipe.
Eight, HS41X anti-fouling isolation valve ordering instructions:
、①产品名称与型号②公称直径③阀体材质④公称压力⑤使用介质⑥ 连接法兰标准 ⑦使用温度⑧ 额定流量系数 ⑨是否带附件以便我们的为您正确选型。 1. ① Product name and model ② Nominal diameter ③ Valve body material ④ Nominal pressure ⑤ Use medium ⑥ Connection flange standard ⑦ Operating temperature ⑧ Rated flow coefficient ⑨ Are there accessories for our correct selection for you.
、如有特殊要求时请在订购产品时注明 2.If there are special requirements, please indicate when ordering the product
、若已经由设计单位选定的型号，请按型号直接向我司销售部订购。 3. If the model has been selected by the design unit, please order directly from our sales department according to the model.
、当使用的场合非常重要或环境比较复杂时 , 请您尽量提供设计图。 4. When the use occasion is very important or the environment is more complicated , please provide design drawings as much as possible.
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