Bellows Sealed Gate Valve
Features of API bellows gate valve
The opening and closing part of the bellows gate valve is a plug-shaped valve disc, the sealing surface is flat or conical, and the valve disc moves linearly along the centre line of the fluid. The movement form of the valve stem includes a lifting rod type (the valve stem is raised and lowered, the handwheel does not rise), and there is a lifting rotating rod type (the handwheel and the valve stem rotate and rise together, and the nut is set on the valve body). The bellows gate valve is only suitable for fully open and fully closed, adjustment and throttling are not allowed. This type of valve should generally be installed horizontally in the pipeline.
The valve stem of the gate valve adopts a double sealing structure of bellows and packing to ensure a leak-free seal at the valve stem. It is used in power stations, natural gas, ammonia, vacuum, refrigeration systems, hot oil, and hot water systems, and is especially suitable for flammable and explosive, Toxic and precious media pipelines.
Product specification of API bellows type seal gate valve
Pressure classes: PN1.6-PN16 MPa
Size range: DN20-DN250
Material: WCB, SS
Collection end: RF
Medium: steam, gas, water, oil
Sealing way: hard sealing
Technical data of bellows sealing design gate valve
manufacturer's standard: API600, DIN3356
Inspection and test standard: API 598, DIN3230
Structural length standard: ANSI B16.1, DIN3202
Flanges standard: ANSI B16.5, DIN2543-2545
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