1, sealing surface without friction 2, corrosion resistant 3, travel short 4, open speed 5, installation space is little
Stay open metal seal valve and orbit than ball valve
(1) in common stay open metal seal valve and track ball valves have in common. (1) can realize metal seal, high temperature resistant. (2) the mode of operation is same, can be the handwheel operation or bevel gear reducer operation. (3) the valve stem action the same way. To ascend, the valve sealing surface away from the seat sealing surface, valve stem drive after ball rotated 90 °, the realization of the valve open and close.
(2) the difference stay open metal seal valve and track ball valves have different place. (1) the internal sphere structure is different. Stay open valve disc (sphere) for composite structure, track ball valve ball is a whole ball. (2) stay open valve is two-way seal, and gate valve the same, no flow requirements. And the track ball valve just one-way seal, there is flow requirements. (3) stay open the valve guide groove in support, guide pin in the valve stem, guide pin at each end of the pack a roller, so guide pin in the guide slot is rolling friction, friction small. Track ball valve guide groove in the valve stem, guide pin into support, between the friction for sliding friction, high friction. (4) stay open valve can be design seal, can be in the valve with pressure increases or change filler. And the track ball valve design should not be sealed. (5) stay open valve closed to them cavity blowing, and track ball valve no
Stay open metal seal valve is a new type of structure valve, the structure design of the key is that it combines the advantages of ball valve and gate valve, the valve has high practicability.
 

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