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Home > News > Ball valve Encyclopedia

Ball valve Encyclopedia - 2014-01-13 11:24:14

Ball Encyclopedia : floating ball , fixed ball , seal valve , V- ball valve, insulation ball valve, ball valve , wafer type ball valve

Track ball valve, ball valve tops , pigging valves, forged steel ball valve, ball valve , thread ball , the whole ball valve, cryogenic ball valves

Bellows valve, eccentric half ball , fully welded ball valve , special ball

Ball roughly divided into 19 categories , floating ball valve, fixed ball valve, metal seal valve , V -type valve, wafer type ball valve, insulation jacket ball valve, pipeline valve , track ball , tops ball valve , pigging valves, high pressure forged ball , tee ( Stone ) ball , thread ball , the whole ball valve, cryogenic ball valves , bellows valve, eccentric valve, fully welded ball valve, ball valve and so special .

Applicable to a wide range of ball valves , ball valves suitable for :

1, The nominal diameter from 8mm to 1200mm.

2 , PN from vacuum to 42MPa.

3 , Working temperature from -204 ℃ ~ 815 ℃.

Ball form of the structure Category:

A floating ball valve

The ball valve is floating in the medium under pressure , to produce a displacement of the ball is pressed against the sealing surface and the outlet end , the outlet end of the guarantee seal.

Floating ball valve of simple structure, good sealing, but the ball all bear the load of the working medium to pass the exit ring, so to consider the ring material can withstand the media sphere work load. This structure is widely used in low-pressure valve.

Second, fixed ball valve

The ball valve is fixed, no pressure after the move . Are fixed with a floating ball valve seat after by media pressure , the valve seat to move , so seals pressed on the sphere , in order to ensure sealing . Usually with the ball , the lower shaft with bearings, operating torque , suitable for high pressure and large diameter valves.

In order to reduce operating torque and increased ball reliability of the seal , valve seals has emerged in recent years , both in a special lubricant injection pressure between the sealing surface to form a layer of film that enhances the seal, and reduce operating torque more suitable for large diameter high pressure valve.

Third, elastic ball valve

The ball valve is elastic. Ball and seat seals are made of metal materials, sealing pressure than large, rely on the media itself has reached less pressure sealing requirements must apply force . This valve is suitable for high temperature and pressure medium.

Elastic sphere is the sphere in the lower end of the inner wall of the tank to open a flexibility , and access flexibility. When closing the channel , wedge-shaped head with stem and seat opened up so that the sphere pressing to seal . Before turning the ball first release wedge-shaped head , the ball followed to restore the original prototype, so that small gap , sealing surface can reduce friction and operating torque between ball and seat .

Ball position can be classified according to their straight- channel , three- and right-angle type . Tee and right angle ball valve for dispensing media and change the flow of the medium.

Keywords:butterfly valve ,knife gate valve,ball valve,globe valve,slurry gate valve

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