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online seal flange knife gate valve

Gate valve its closure principle is wedge seal face is consistent with the seat sealing surface and high gloss,fit each other.which can prevent the medium from flowing and also to enhance the sealing effect rely on the backform,spring or the model of disc.
4.pressure seal gate valve the pressure seal gate valves are designed in accordance with api600 and asme b16.34 for service of high temperature and high pressure and are widely used in fossil fuel power plant.
Types of gate valve based on body, bonnet connection. 1 st is screwed bonnet: this is the simplest design available and it is used for inexpensive valves. 2 nd is bolted-bonnet: this is the most popular design and used in a large number of gate valves. this requires a gasket to seal the joint between the body and bonnet.
Bolted bonnet bellows seal flexible wedge gate valves; bolted bonnet bellows seal globe valves; bellows seal cast steel valves (bolted bonnet) cast steel bellows seal gate; cast steel bellows seal globe; bellows seal api 602 small forged valves. extended body bellows seal gate valves; bellows seal globe valves; bellows seal gate valves; velan abv valves

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