Working Principles of Butterfly Valves
How Do Butterfly Valves Work?
The butterfly valve opening and closing part is a butterfly plate, which is driven by the valve stem and rotates 90° around its own axis in the industrial valvebody to achieve the purpose of opening and closing or adjustment. It has simple structure, small size, short structure length, small size, light weight, which is suitable for large-diameter large butterfly valves.
Ⅰ. The butterfly valve working principle
The butterfly valves are usually less than 90° from fully open to fully closed. The butterfly valves and the butterfly stems have no self-locking ability. For the positioning of the butterfly plate, a worm gear reducer must be installed on the valve stem. The use of worm gear reducer can not only give the butterfly plate self-locking ability, making the butterfly plate stop at any position, but also improve the operation performance of the valve. The characteristics of the industrial butterfly valves: high temperature resistance, high applicable pressure range, large nominal diameter of the valve, the valve body is made of carbon steel, and the sealing ring of the valve plate uses a metal ring instead of a rubber ring. The large high temperature butterfly valves are made of steel plate welding, and are mainly used for flue ducts and gas pipes of high temperature media.
Ⅱ. The structural characteristics of the butterfly valves
1. The butterfly valves have the characteristics of simple structure, small size, light weight, low material consumption, small installation size, rapid switching, 90° reciprocating rotation, and small driving torque. They are used to cut off, connect, and adjust the medium in the pipeline. They have good fluid control characteristics and close sealing performance.
2. The butterfly valves can transport mud, and the accumulation of liquid at the pipe mouth is the least. Under low pressure, good sealing can be achieved with good adjustment performance.
3. The streamlined design of the butterfly plate makes the fluid resistance loss small, which can be described as an energy-saving product.
4. The valve stem is a through-rod structure, after quenching and tempering and it has good comprehensive mechanical properties, corrosion resistance and scratch resistance. When the butterfly valves are opened and closed, the valve stems only rotate and do not move up and down. The packing of the valve stem is not easy to be damaged and the sealing is reliable. It is fixed with the butterfly plate cone pin, and the extended end is designed to prevent the valve stem from collapsing when the connection between the valve stem and the butterfly plate is accidentally broken.
5. Connection methods include flange connection, butt connection, butt welding connection and lug butt clamp connection.
If you want to know more details of plate valve working principle, please contact us.
As a china check valve supplier, we will do our best to meet all the needs of customers.
在线联系供应商
Other supplier products
Linear Motion Control Valves | Linear motion controlis a kind of action of control valves, its actuator receives the control signal and turns the signal into displacement thrust ... | |
When Should We Avoid Using Metal Hard Seal Butterfly Valves | The sealing pair of the Butterfly Valvesusually adopts an elastic sealing material such as rubber or plastic and a metal-to-metal sealing pair, and... | |
Inconel Ball Valves | Weidouli Valvesis very well known for its excellence in executing orders for Inconel ball valves. Inconel valve ballhas many different grades, such... | |
Strainers | The titanium straineris an indispensable device in the transmission medium pipeline. It is usually installed in the pressure reducing valve, pressu... | |
Duplex Gate Valves | Duplex stainless steel has the advantages of both ferritic stainless steel and austenitic stainless steel: austenitic stainless steel reduces the b... |
Same products
Male Thread Nickel Plated Brass Butterfly Ball Valve | 卖方: Zhejiang Huibo Valve Technology Co., Ltd. | Male Thread Nickel Plated Brass Butterfly Ball Valve Material: Brass Body, Brass Bonnet, brass ba... | |
4800030000 For daewoo,evobus,mercedes-benz,paccar foot brake valve | 卖方: Zhuji Oubote Auto Parts Co., Ltd. | 4800030000 foot brake valve are attached to the brake pedal. This isthe valve that actually start... | |
Aluminum Gas Valve | 卖方: Dong Guan ABYDA Gas Valve Co., Ltd | Product Specification:1. Raw Material: Al Alloy + solid brass + Mild steel;2. Applicable for LPG,... | |
Yoyik supply Fan slider S4GA8814 for turbine generator | 卖方: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | Yoyik supply Fan slider S4GA8814 for turbine generator Is a major production of Dongfang Yoyik. D... | |
API 6A FC Slab Gate Valve | 卖方: China JSC Valve Manufacturer Group Co., Ltd. | FC gate valve adopts a non-rising stem, slab gate, full-size conduit design, floating slab gate a... |