2013年5月12日星期日

Gate valve, also known as gate valve


It is composed by a shutter, the two sealing plate and stem. Implementing agencies usually electric solenoid valve
Long actuators or piston actuator. The gate can be operated from a single gate, double plate can also be used, the gate valve is commonly used in high viscosity, fiber-containing slurry fluid control. It has a small flow resistance, travel, large-caliber, simple structure and other characteristics, suitable for controlling less precision large diameter, high flow, low dropout applications.
Compared with the butterfly valve, gate valve having a better shear capacity, particularly suitable for the control of the fiber-containing slurry, such as the control of the pulp in the paper industry. Since the sealing surface is large, the amount of leakage of the gate valve. Otherwise a similar valve, called the parallel slide valve. It consists of two parallel slider to move up and down to control the flow, the slider slider spring squeeze the rails, type of valve has a small fluid resistance and excellent sealing performance, standard leak amounted to 0.00001% C. Suitable for emergency shut-off or emergency open applications.
Other special purpose control valve for a particular application, on the basis of said control valve, if the bonnet is lengthened, add the fins can be used for low and high temperature; using a plurality of spring actuators can be reduced the size and weight of the entire control valve; a series of noise reduction measures designed to reduce the noise can be composed of a low-noise control valve; addition, there are separate valve for easy maintenance and cleaning the valve body of the valve body separation structure; the interlocking action using quick shut-off valve; designed for small flow control the tiny flow control valve; bellows seal control valve to prevent leakage used; superheated steam steam control valve less a mild steam turbine bypass system application.pneumatic fitting

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