1. Small fluid resistance. The internal mass channel of the valve body is straight, the mass flows in a straight line, and the flow resistance is small.
2. Water hammer is not easy to occur. The reason is the long shutdown time.
3. Simple shape, short structural length and good manufacturing process. Scope of application
4. When fully open, the sealing surface is less eroded by the working mass than that of the stop valve.
5. The body shape is relatively simple and the casting process is good.
Light weight: The body is made of high-grade ductile black cast iron, which is about 20% to 30% lighter than traditional gate valves and is easy to install and maintain.
Flat-bottomed gate seat: Traditional gate valves often have foreign objects such as stones, wood blocks, cement, iron filings, debris, etc. accumulated in the groove at the bottom of the valve after the pipe is washed with water, which can easily lead to leakage due to inability to close tightly. The bottom of the elastic seat seal gate valve adopts the same flat bottom design as the water pipe machine, which is not easy to cause debris accumulation and allows the fluid to flow smoothly.
Overall rubber coating: The gate uses high-quality rubber for the overall inner and outer coating. Europe's first-class rubber vulcanization technology enables the vulcanized gate to ensure precise geometric dimensions, and the rubber and ductile cast gate are firmly connected and are not easy to fall off and Good elastic memory. water
Double-gate gate valves should be installed vertically (that is, the valve stem is in a vertical position and the handwheel is at the top).
1. The specifications and categories of soft seal gate valves should comply with the requirements of the pipeline design documents.
2. The model of the soft seal gate valve should be indicated with the national standard number requirements. If it is an enterprise standard, the relevant description of the model should be indicated.
3. The working pressure of the soft-sealing gate valve is required to be Greater than or equal to the working pressure of the pipeline. Without affecting the price, the working pressure that the valve can withstand should be greater than the actual working pressure of the pipeline. Either side of the soft-sealing gate valve should be able to withstand it when it is closed. 1.1 times the valve working pressure without leakage; when the valve is open, the valve body should be able to withstand twice the valve working pressure.
4. The soft seal gate valve manufacturing standard should indicate the national standard number it is based on. If it is an enterprise standard, the enterprise document should be attached to the purchase contract.
1. The valve body material should be mainly cast iron, cast steel, stainless steel, and 316L, and the grade and actual physical and chemical testing data of the cast iron should be indicated.
2. The valve stem material should be made of stainless steel (2CR13). Large-diameter valves should also have stainless steel embedded stems.
3. The nut material is cast aluminum brass or cast aluminum bronze, and its hardness and strength are greater than the valve stem.
4. The hardness and strength of the valve stem bushing material should be no greater than that of the valve stem, and it should not cause electrochemical corrosion with the valve stem and valve body when immersed in water.
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