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Classification of pneumatic ball valve

Edit: Vatac Vango Valves (Wenzhou) Corp      Date:Mar 20, 2015

Is a kind of pneumatic valve pneumatic ball valve, have super short type ball valve, pneumatic insulation cuts off the ball valve, pneumatic ball valve, hard seal fixed ball valve, pneumatic o type cuts off the ball valve, pneumatic thread ball valve and so on. Depending on the sphere can be divided as floating ball valves, trunnion ball elastic spherical pneumatic and pneumatic ball valve ball valve.

Pneumatic ball valve, floating: stainless steel ball valve ball is floating, under media pressure, sphere can generate a certain degree of displacement and compression seal face on the export side, ensure the outlet seal. Floating stainless steel ball valve structure is simple, well sealed, but ORB working under medium load all passed to the exporting ring and should therefore consider sealing ring material can withstand sphere medium work loads. This structure, is widely used in medium pressure ball valve.

Second, fixed ball valve: stainless steel ball valve ball is fixed, the compression does not produce movement. TRUNNION mounted ball valve with floating seats, medium pressure, seat mobile so that seals against the globe in order to ensure the sealed. Usually in the sphere of the upper and lower shaft with bearings, operate small torque, suitable for high pressure and large diameter valves. In order to reduce the ball valve operating torque and increase reliability of seals, in recent years there have been oil seal ball valve, both on the bet special lubricating oil on the sealing surface, to form a film of oil, which enhances the sealing, and reduce operating torque, more suitable high pressure large diameter ball valves.

Third, the elastic spherical ball valve: pneumatic ball valve ball is elastic. Ball and seat seal rings are manufactured using metal, sealing pressure is very big, relies on the pressure of the medium itself is not up to the sealing requirement must be met with force. This valve is suitable for high temperature and high pressure media. Elastic sphere within a sphere a slot opening at the lower end of the wall, and gain flexibility. When the channel is closed, using wedge balls rolling out of valve stem and valve seat pressure sealed. Rotating sphere before you loosen the wedge-shaped head, the ball came back to his original form, so there is a small gap between the ball and seat can reduce the friction of the sealing surface and operating torque.


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