Flat Gate Valve for Water Supply System

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1. It has the advantages of simple and compact structure, reasonable design, reliable sealing, light and flexible operation, small size, smooth channel, low resistance, easy installation and easy disassembly.

2. When the valve is fully opened, the flow resistance coefficient is very small, and the valve will eliminate the function of the valve disc and the dirt on the sealing surface every time the valve is opened and closed.

3. The packing is made of flexible graphite ring and graphite packing, reliable sealing, light and flexible operation.

4. It is widely used in oil and water steam pipelines such as petrochemical industry and thermal power plants to connect or cut off the intermediate quality of pipelines. The sealing surface of the opening and closing device has compact structure and reasonable design.

• Our service tenet is customer first, service first. We will provide more accurate and efficient manufacturing and service according to customer requirements.
• We have a professional QC team to ensure that the products in Flat gate valve for water supply system meet your needs and do better.
• Check raw materials before production at Flat gate valve for water supply system.
• Spot checks are carried out during the processing of Flat gate valve for water supply system.
• 100% inspection of Flat gate valve for water supply system before shipment.
• Provide a one-year service for the products provided by Flat gate valve for water supply system to create value for customers.

• We have complete production technology and management.
• As a manufacturer our price is also good.

To be packed in suitable wooden cases as per client's

Q: What is the advantage of ductile iron pipe in water supply pipeline?

A: Because ductile iron pipe adopts flexible joint, the construction operation is more convenient, can improve the construction efficiency, improve the construction conditions, reduce the construction cost, and most of the interface is connected by rubber rings, easy to operate, can shorten the construction period, reduce the construction cost. Second: Ductile iron pipe has the advantages of high water supply pressure, resistance to external load and adaptation to changes in geological conditions. The pipe has the advantages of high strength, good toughness, corrosion resistance, easy installation of flexible interface, strong seismic resistance and low labor intensity. It can be applied to the area with poor geology and across the road without additional processing of steel pipe. Coupled with strong corrosion resistance, it can be applied to coastal and saline-alkali zones. At present, it is widely used in underground pipeline engineering. Large-scale pipeline installation projects can better reflect the advantages of convenient installation and low labor intensity. Third: ductile iron pipe sealing performance is good, not easy to leak, can reduce the leakage rate of pipe network and reduce the daily maintenance costs of pipe network.

Q: Which two categories of products do grooved fittings include?

A: The pipe fittings that play the role of connection and sealing have fire clamps (rigid joints), flexible joints, mechanical tees and groove flanges;

The pipe fittings that play the role of connection and transition are elbow, tee, tee, reducing pipe, blind plate and so on.

Q: What factors should be considered when selecting valve sealing material?

A: The sealing surface is the most critical working face of the valve, the quality of the sealing surface directly affects the service life of the valve, and the material of the sealing surface is an important factor to ensure the quality of the sealing surface. Therefore, the following factors should be considered when selecting valve sealing surface materials:

① Corrosion resistance. "Corrosion" is the process in which the sealing surface is damaged under the action of the medium. If the surface is damaged in this way, the tightness cannot be guaranteed, therefore, the sealing surface material must be resistant to corrosion. The corrosion resistance of a material mainly depends on the composition of the material and its chemical stability.

② Resistant to bruising. "Abrasion" refers to the damage caused by friction in the process of relative movement of the sealing surface. This damage will inevitably cause the damage of the sealing surface, therefore, the sealing surface material must have good abrasion resistance, especially the gate valve. The abrasion resistance of a material is often determined by the internal properties of the material.

③ Erosion resistance. "Erosion" is the process of destroying the sealing surface when the medium flows through it at high speed. This kind of damage is more obvious in the throttle valve and safety valve used in high temperature and high pressure steam medium, which has a great impact on the damage of sealing, therefore, erosion resistance is also one of the important requirements of sealing surface materials.

④ There should be a certain hardness, and the hardness does not decrease greatly at the specified working temperature.

⑤ The linear expansion coefficient of the sealing surface and the body material should be similar, which is more important for the structure of the sealing ring, so as to avoid additional stress and cause loosening at high temperatures.

⑥ When used under high temperature conditions, there should be enough oxidation resistance, thermal fatigue resistance and thermal cycling.

Under the current circumstances, it is difficult to find a sealing surface material that fully meets the above requirements, and it can only meet the requirements of certain aspects according to different valve types and uses. For example, valves used in high-speed media should pay special attention to the erosion resistance requirements of the sealing surface; When the medium contains solid impurities, the sealing surface material with higher hardness should be selected.

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