What are the difference between gas butterfly valve and globe valve
Gas butterfly valve is mainly characterized by high temperature resistance, the applicable pressure range is also higher, the valve nominal diameter, the body is made of carbon steel, the valve plate sealing ring using metal ring instead of rubber ring. Large high temperature butterfly valve is made of steel plate welding, mainly used for high temperature medium flue duct and gas pipeline.
Gas butterfly valve is the use of stem on the circular butterfly valve plate for opening and closing operation, to achieve the opening and closing operation of the valve. Butterfly valves are not suitable for tight connection with the pipe wall. The flow rate cannot be used to cut off the pipeline. It is usually used to adjust the flow rate of the pipeline conveying air and flue gas. The gas butterfly valve is more and more widely used in low-pressure and large-diameter pipelines.
Globe valve has a simple structure, easy maintenance, good regulation performance, widely used in various media pipeline, but the liquid is not suitable for high viscosity, suspended solids, crystal material pipeline, also does not apply to the exhaust valve and low vacuum system valve. The stop valve is mainly used to connect or cut off the medium in the pipeline, and is generally not used to adjust the flow. Globe valves have a large pressure and temperature range, but are usually used in small and medium-sized pipelines.
Cut-off valve is only suitable for full opening and full closing, not allowed to adjust and throttle, cut-off valve opening and closing parts are plug-shaped valve, sealing surface is flat or conical, the valve along the center line of the fluid for linear motion.
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