as the domestic valve market over the years various valves, types, functions, each are not identical, in the face of so many kinds of valves, how should we choose? Very simple, choose according to their needs. Several type of Industrial Valves is on purpose, we compared the commonly used, not as good as what are the first to know about the common valve.

a common valve: electric gate

electric gate valve is used as a cut-off media, through the entire circulation when fully open, at this time, the operation of the medium pressure, loss is minimal.

gate valves are normally applied to, do not need to often open/close, and keep the gate full open or full close condition. Is not suitable for use as adjusting and throttling.

for high-speed flow medium, ram in a local open condition, can cause the vibration of the valve, and vibration, and may damage the gate and seat sealing surface, and throttle, can make the gate medium of erosion.

from the structure form, the main difference is adopted in the form of packing element.

according to the form of sealing element, often the gate valve is divided into several different types, such as: parallel double parallel wedge gate valve, gate valve, gate valve, wedge double disc brake, etc. Wedge gate valve is the most commonly used form of peace commonly used two electric valve globe valve

electric cut-off valve stem and valve seat sealing surface vertical axes. Open or close the valve stem is relatively short.

stop valve disc once in an open position, it's between the seat and clapper sealing surfaces, no longer contact, thus its sealing surface mechanical wear and tear is small, because most of the valve seat and valve disc, easy to repair, replacement of sealing components, without the whole valve, removed from the pipeline, this for valves and pipeline welding as a body, is very suitable for. The above features make the cut-off valve is very suitable for, used as a medium cut or adjust and throttling.

medium through this valve, flow direction change. As a result, the cut-off valve flow resistance, more than any other valves.

three commonly used Industrial Valves, electric butterfly valve

electric butterfly valve butterfly plate installed on the diameter of the pipe direction. Cylindrical channels in butterfly valve body, disc disc around the axis of rotation, the rotation Angle of 0 ~ 90 degrees, rotate to 90 degrees, the valve is fully open

butterfly valve has simple structure, small volume, light weight, only a few parts. And only need to rotate 90 degrees, can rapid opening and closing, simple operation, at the same time, the valve has good flow control characteristics. Butterfly valve in the fully open position, thickness, only medium flow body resistance, therefore, by the valve pressure drop is very small. Butterfly valves have a seal and metal seal two seal forms. Elastic sealing valve, sealing ring can be embedded in the body, or near the butterfly plate peripheral.

use metal sealing valve generally live longer than elastic sealing valve, but it is hard to be completely sealed. Metal sealing can adapt high working temperature, elastic seal has, restricted by temperature.

if required butterfly valve used as flow control, the main is that the correct selection of the size and type of valve. The structure principle of butterfly valve, especially for the production of large diameter valves. Butterfly valve in the oil, gas, chemical industry, not only is widely used on water treatment and other general industrial, but also applied to the cooling water system of thermal power plants.

four commonly used valve: electric ball valve

ball valve is made up of rotary valve. It rotates 90 degrees with the same action, the difference is that the cock body is a sphere, the circular hole, or channel through its axis.

the sphere and the proportion of the gangway, should be such, that is when the ball rotate 90 degrees, in the inlet and outlet should be completely present spherical, thereby blocking flow.

ball valve just has to turn 90 degrees in operation and small power, can be closed tightly. Security equal valve lumen, provides the medium resistance is very small, straight flow channel.

usually do think most suitable direct ball valve open and close, but recent development has been the ball valve is designed, make he has throttling and control flow.

the main characteristic of ball valve is, itself, compact structure, easy operation and maintenance, applicable to water, solvent, acid and gas, such as general work medium, but also is suitable for the working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene. Ball valve body can be a whole, also can be combined.

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