Nov. 01, 2021
Both gate and butterfly valves are used in pipelines to switch on and off and regulate the flow. Of course, there are methods in the process of matching butterfly valves and gate valves.
According to the role and use of gate valves and butterfly valves, gate valve flow resistance is small, good sealing performance, because the gate valve plate and the media flow is a vertical angle, if the gate valve in the valve plate switch is not in place, the media on the valve plate fluttering valve plate, it is easy to damage the gate valve seal.
Butterfly valve, also called flap valve, is a simple structure of the regulating valve, can be used for low-pressure pipeline media switch control of the butterfly valve is the closing member (valve flap or butterfly plate) for the disc, rotating around the valve shaft to achieve the opening and closing of a valve, the valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil, liquid metal, and radioactive media. The pipeline mainly plays a cutting and throttling role. The opening and closing member of the butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to open and close or regulate the purpose. The butterfly plate is driven by the valve stem, and if it turns 90°, it can complete opening and closing once. The flow of the medium can be controlled by changing the deflection angle of the butterfly plate.
The butterfly valve is used in the pipeline for conveying various corrosive and non-corrosive fluid media in the engineering system of the furnace, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation and environmental protection, building water supply and drainage, etc. It is used to regulate and cut off the flow of media.
The gate valve is an opening and closing member gate, the direction of movement of the gate is perpendicular to the direction of the fluid, the gate valve can only be fully open and fully closed, not suitable for the gate parameters vary, usually 5 °, the medium temperature is not high when 2 ° 52'. Improve its craftsmanship, to compensate for the deviation of the sealing surface angle in the process, this gate is called the resilient gate.
When the gate valve is closed, the sealing surface can only rely on the medium pressure to seal, i.e., only rely on the medium pressure to press the sealing surface of the gate plate to the other side of the valve seat to ensure the sealing surface, which is self-sealing. Most of the gate valves are forced to seal, that is, when the valve is closed, rely on external force to force the gate plate to the seat, to ensure the sealing surface of the sealing.
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