Gate valve:Gate valve refers to the closure (gate) along the channel axis of the vertical direction of the valve, in the pipeline is mainly used as a cut-off medium, that is, fully open or fully closed use. In general, the gate valve can not be used as a regulator flow. It can be applied to low temperature pressure can also be applied to high temperature and high pressure, and according to the different materials of the valve. But the gate valve is generally not used to transport mud and other media in the pipeline.
Advantages:
The fluid resistance is small;
② The torque required for opening and closing is small;
③ can be used in the medium to the two direction of the flow of the ring network pipe, that is to say, the flow of the medium is not restricted;
④ fully open, the sealing surface by the erosion of the working medium is smaller than the cut-off valve;
⑤ The structure of the body is relatively simple, and the manufacturing process is good;
The structure length is relatively short.
Disadvantages:
The overall size and opening height are large, and the installation space is also large;
In the process of opening and closing, the sealing surface is relatively frictional, and the wear is large, and even it is easy to cause scratches at high temperatures;
The general gate valve has two sealing surfaces, to the processing, grinding and maintenance increased some difficulties;
④ Long opening and closing time.
Globe valve:Refers to the closing parts (valve) along the valve seat centerline movement. According to this form of movement of the valve flap, the change of the valve seat opening is proportional to the valve flap stroke. Because of this type of valve stem opening or closing stroke is relatively short, and has a very reliable cut-off function, and because the change of the valve seat port and the stroke of the valve flap are proportional, it is very suitable for the regulation of flow. Therefore, this type of valve is very accommodating for cut-off or regulation as well as throttling.
Advantages:
① in the process of opening and closing, because the friction between the valve and the valve body sealing surface is smaller than the gate valve, so wear.
The opening height is generally only 1/4 of the valve seat channel, so it is much smaller than the gate valve;
③ usually only one sealing surface on the valve body and disc, so the manufacturing process is better and easy to repair.
④ Because the filler is generally a mixture of asbestos and graphite, it has a high temperature resistance grade. General steam valves are globe valves.
Disadvantages:
① Because the flow direction of the medium through the valve has changed, the minimum flow resistance of the stop valve is also higher than most other types of valves;
② Due to the long stroke, the opening speed is slower than the ball valve.
Pressure Reducing Valve:It is a valve that reduces the inlet pressure to a certain required outlet pressure by adjustment, and relies on the energy of the medium itself to automatically maintain a stable outlet pressure.
Check Valve:Also known as reverse flow valve, check valve, back pressure valve andOne-way valve. These valves are automatically opened and closed by the force generated by the flow of the medium itself in the pipeline, which is an automatic valve. The check valve is used in the pipeline system, its main function is to prevent the backflow of the medium, to prevent the reverse of the pump and the drive motor, and to discharge the container medium. The check valve can also be used on the pipeline to supply auxiliary systems where the pressure may rise above the system pressure. It can be divided into swing type (rotation according to the center of gravity) and lift type (moving along the axis).
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Wuhan Xiete Valve Technology Co., Ltd.Focus on all kinds of valves,Filter,Gas drainerA professional manufacturing enterprise integrating R & D, production, sales and after-sales of throttle orifice plates, with 20 years of rich experience in the industry, owns the Xiete valve brand, builds the best R & D professional team in the industry, and has a number of independent design and development Patented products to provide customers with the bestValve function customization solution, and has successfully provided professional design customization services for many enterprises and institutions. At the same time, Wuhan Xiete Valve Technology Co., Ltd. has obtained ISO9001 quality system certification and TS special equipment license. Our product types, complete styles, quality assurance, factory direct sales, economical, convenient and fast to provide customers with one-stop service!
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