Structural characteristics of marine valve

According to the structural characteristics of marine valves, marine valves can be divided into gate valves, globe valves (ball valves), check valves, safety valves, throttle valves, steam traps, etc. Marine gate valves are installed without directionality.

The marine Gate Valve has the characteristics of small fluid resistance and wide applicable pressure and temperature range. The diameter shrinkage can reduce the size of the parts, the force required for opening and closing is correspondingly reduced, and at the same time, the application range of the parts can be expanded. However, after the diameter is contracted, the fluid resistance loss increases.

The domestic low-pressure gate valve is generally made of cast iron material. The cast iron gate valve often has serious problems such as valve body freezing crack and gate falling off. The carbon steel stem of the cast iron gate valve is easy to rust, and the quality of the packing gasket is poor.

1. Serious internal and external leakage

1. Light weight: The body is made of high-grade ductile black cast iron, which is about 20%~30% lighter than the traditional gate valve, and is easy to install and maintain.

2. Overall lagging: The gate is made of high-quality rubber for the overall inner and outer covering. The first-class rubber vulcanization technology in Europe enables the vulcanized gate to ensure a good geometric size, and the rubber and the ductile cast gate are firmly connected, and it is not easy to Good shedding and elastic memory.

3. Flat-bottomed gate seat: The traditional gate valve often accumulates in the groove at the bottom of the valve due to foreign objects such as stones, wood blocks, cement, iron filings, sundries, etc. after the pipe is washed with water. 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 makes the fluid flow unobstructed.

4. Precision casting valve body: The valve body adopts precision casting, and the geometric dimensions make the valve body's interior without any finishing to ensure the sealing performance of the valve.