Gate valves and butterfly valves in the pipeline are used to play the role of switching, regulating flow. Of course, there is still a method in the selection process of butterfly valves and gate valves.
The same specifications of the gate valve price is higher than the price of butterfly valve. But from the use of the last ten years, the butterfly valve failure than the gate valve high, so in the conditions permit, expand the use of the gate valve is worthy of attention.
Butterfly valve in the use of gate valve difference:
In accordance with the role of the gate valve and butterfly valve and the use of the valve, the gate valve flow resistance is small, good sealing performance, because the gate valve valve plate and the media flow is a vertical angle, if the gate valve in the valve switch is not in place, the media on the valve plate scouring so that the valve plate trembling, it is very easy to shine into the gate valve seal damage.
Butterfly plate driven by the valve stem, if turned 90 °, will be able to complete a opening and closing. Change the deflection angle of the butterfly plate, you can control the flow of media.
Use of conditions and media: butterfly valve is suitable for 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 and other engineering systems to transport a variety of corrosive, non-corrosive fluid media on the pipeline, used to regulate and cut off the flow of media.
Gate valve is an opening and closing member of the gate, the movement direction of the gate is perpendicular to the direction of the fluid, the gate valve can only be used for the full open and full closed, do not apply to the parameters of the door and different. Improve its craftsmanship, make up for the angle of the sealing surface in the processing of the deviation, this gate is called elastic gate.
When the gate valve is closed, the sealing surface can only rely on the medium pressure to seal, that is, only rely on the medium pressure will be the sealing surface of the gate to the other side of the seat to ensure that the sealing surface of the sealing surface, which is self-sealing. Most of the gate valve is used to force sealing, that is, when the valve is closed, to rely on external forces to force the gate to the valve seat to ensure that the sealing surface of the sealing.
Motion: gate valve gate with the valve stem for linear motion, also known as rising stem gate valve. Gate valve stem nut on the gate, the handwheel rotation drives the valve stem rotation, so that the gate lift, this valve is called a nrs gate valve.
Post time: Aug-08-2024
