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The characteristics of fire valve and resilient wedge gate value company

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The characteristics of fire valve and resilient wedge gate value company

Author:
Source:
Time
2020/09/18
One of the most notable features of cryogenic resilient wedge gate values is that their bonnets are generally long-necked. GB/T 24925 "Technical Conditions for Cryogenic Valves" also clearly stipulates that the bonnets of cryogenic gate valves, globe valves, ball valves, and butterfly valves should be The use temperature requirements of the bonnet are designed into a long-neck bonnet structure that is convenient for cold preservation to ensure that the temperature at the bottom of the stuffing box remains above 0°C.”

Resilient wedge gate value lightweight: The fire valve body is made of high-grade nodular black cast iron, which is about 20% to 30% lighter than traditional valves, and is easy to install and maintain.

 

Flat-bottomed resilient wedge gate value: Traditional valves often deposit in the groove at the bottom of the valve due to foreign objects such as stones, wood, cement, iron filings, and debris after the pipe is washed with water, which can easily cause water leakage due to failure to close tightly. The bottom of the elastic seat seal valve adopts the same flat-bottom design as the water pipe machine, which is not easy to cause debris siltation and makes the fluid flow unimpeded.

 

Integral encapsulation: The resilient wedge gate value adopts high-quality rubber for the overall inner and outer rubber. European first-class rubber vulcanization technology enables the vulcanized gate to ensure accurate geometric dimensions, and the rubber and ductile cast gate are firmly connected, not easy to fall off. Excellent flexibility.

 

Precision casting resilient wedge gate value body: The resilient wedge gate value body adopts precision casting, and the precise geometric dimensions make the inside of the valve body without any finishing to ensure the sealing of the valve.

 

Advantages of fire resilient wedge gate values

 

1. The fluid resistance is small, and the sealing surface is less brushed and corroded by the medium.

  

2. It saves effort to open and close.

  

3. The flow direction of the medium is not restricted, does not disturb the flow, and does not reduce the pressure.

 

4. Simple shape, short structure length, good manufacturing technology and wide application range.

 

Disadvantages of fire resilient wedge gate values

 

1. It is easy to cause erosion and scratches between the sealing surfaces, which makes maintenance difficult.

 

​​​​​​​2. The external size is large, a certain space is required for opening, and the opening and closing time is long. 

3. The structure is more complicated. 

  Cryogenic resilient wedge gate values are   widely used in the fields of fertilizer, LNG and petrochemical industry. Except for liquid nitrogen and other liquid inert gases, most of the media controlled are not only flammable and explosive, but also gasification occurs when they are heated or flashed. , Resulting in rapid expansion of the volume, easy to cause leakage and explosion. In the industry, the valves used in the medium temperature below -40 ℃ are called cryogenic valves, and the valves used in the medium temperature below -101 ℃ are called cryogenic valves.

 

One of the most notable features of cryoge  nic resilient wedge gate values i  s that their bonnets are generally long-necked. GB/T 24925 "Technical Conditions for Cryogenic Valves" also clearly stipulates that the bonnets of cryogenic gate valves, globe valves, ball valves, and butterfly valves should be The use temperature requirements of the bonnet are designed into a long-neck bonnet structure that is convenient for cold preservation to ensure that the temperature at the bottom of the stuffing box remains above 0°C.” The design of the extended bonnet structure is mainly to keep the valve operating handle and the stuffing box structure away from the low temperature area, which can not only avoid the frostbite of the operator due to too low temperature, but also ensure that the stuffing box and compression sleeve are used at normal temperature to prevent packing The sealing performance is reduced and the service life of the packing is extended.

 

Because the packing elasticity gradually disappears as the temperature decreases at low temperatures, and the leak-proof performance decreases accordingly. The packing and th  e resilient wedge gate value stem are froz  en due to medium leakage, which affects the normal operation of the valve stem, and at the same time, the valve stem moves up and down. The packing is scratched, causing serious leakage.

 

BOTOU YAXING FLUID EQUIPMENT CO. ,LTD is a resilient wedge gate value manufactures in Chinaif you want to buy resilient seat gate value,resilient or rubber wedge gate value,rubber flap check valve and so on,you can contact us.