Gate valve has the characteristics：

• Small fluid resistance
• Wide range of applicable pressure and temperature.

It is the most commonly used block valve, which is used to cut off or connect the medium in the pipeline. The diameter shrinkage can reduce the size of parts, reduce the force required for opening and closing, and expand the application range of parts. However, the fluid resistance loss increases after the diameter shrinks.

Cast iron material is widely used in domestic low-pressure gate valve. Serious problems such as freezing crack of valve body and falling off of gate often occur in cast iron gate valve. The carbon steel valve rod of cast iron gate valve is easy to rust, the quality of packing gasket is poor, and the internal and external leakage is serious.

The PN10 low pressure carbon steel gate valve produced by COVNA automated valve factory has replaced the traditional iron gate valve, which effectively solves the problems of the cast iron gate valve shell easy to freeze crack, the gate valve is easy to fall off, the valve stem is easy to rust, and the sealing performance is not reliable.

1. Light weight: the body is made of high-grade nodular cast iron, which is about 20% ~ 30% lighter than that of traditional gate valve, which is convenient for installation and maintenance.

2. Overall rubber coating: the ram adopts high-quality rubber for internal and external rubber. The first-class rubber vulcanization technology in Europe ensures the accurate geometric dimension of the vulcanized ram. Moreover, the rubber is firmly connected with the ductile cast ram, which is not easy to fall off and has good elastic memory.

3. Flat bottom gate seat: the traditional gate valve often deposits in the groove of the valve bottom due to foreign objects such as stones, wood blocks, cement, iron filings and sundries after pipe washing, which is easy to cause water leakage due to failure 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 the accumulation of debris and make the fluid unobstructed.

4. Precision casting valve body: the valve body is made of precision casting, and the precise geometric size makes the valve body internal without any finishing to ensure the sealing performance of the valve.

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