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Control valve composition (2)
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Radian-valve

electric valve actuator,radian valve actuator

Pneumatic actuator vavle,radian valve

Adjustment agencies also have different types. Typically, the adjustment mechanism is called a valve. According to the structure classification, the adjustment mechanism is divided into single seat valve, through two-seat valve, three-way valve, angle valve, high pressure valve, diaphragm valve, sleeve valve, ball valve, eccentric rotary valve, gate valve and butterfly valve. Most of the ordinary valves can be added to the valve.

Door accessories, such as actuators, valve positioners, valve position detection sensors.According to the flow characteristics, the adjustment mechanism is divided into linear valve, equal percentage valve and quick opening valve.

According to the form of spool, the adjustment mechanism is divided into straight stroke and angular stroke spool. Straight stroke spool,sub-plate type, plunger type, window type, multi-stage and sleeve type. Corner spool is divided into eccentric rotary, ball, V-shaped cut and butterfly and so on.

According to the adjustment mechanism on the valve cover in the form of adjustment agencies are divided into ordinary type, heat or heat-absorbing, bellows sealed, long neck type and so on. Among them, the heat-type adjustment mechanism for high temperature;endothermic adjustment mechanism for low temperature; for deep freezing should be used with long neck type adjustment mechanism;bellows seal type for toxic, volatile or valuable fluid medium control, to prevent media leakage and damage caused by casualties.

According to the different flow, the adjustment mechanism is divided into flow open and flow off, center outward and outside to the center and so on. In the flowopen class adjustment mechanism, the direction of fluid flow at the throttling of the spool is consistent with the direction in which the valve opens. Flowclose (flowclose) class adjustment mechanism, the valve spool in the direction of fluid flow and valve closure.

The direction of the same. In the out-ward type adjustment mechanism, the fluid flows outward from the center of the sleeve. External to the inward adjustment mechanism, the fluid flows from the outside to the center of the sleeve.

When the movement of the valve stem is different, the adjustment mechanism is divided into the main body valve and the anti-valve.

When the valve stem of the body valve moves into the valve body, the circulation area is reduced and the flow rate is reduced. When the valve stem of the counter valve is moved into the valve body, the circulation area increases and the flow rate increases.

According to the different guide way of the spool, the adjustment mechanism is divided into top guide, top and bottom guide, stem guide, valve seat guide and cage guide. The spool of the top guide adjusting mechanism is guided by a guide shaft of the upper valve cover or the valve body; the spool of the top and bottom guide adjusting mechanism is simultaneously oriented by the guide shaft of the upper and lower valve cover.

The guide is the center of the valve cover and the center of the seat ring center, the sleeve to guide the stem; seat guide in the small flow control valve used, it is guided by the valve seat; And the cage composition of the sleeve structure, the entire stroke range, the spool and the inner surface of the cage.

There is a valve cage hole, the valve core moves to change the circulation area of ??the cage. The valve cage and the valve cover, the seat is self-centering, in order to achieve the guide of the spool.

According to whether the valve body is separated, the adjustment mechanism is divided into the whole valve and the valve body separation valve. The valve body of the integral valve is a whole. Separate valve body can be separated, easy to disassemble and carry out internal cleaning, the replacement of the internal lining and so on.

According to the material of the valve body, the adjustment mechanism is divided into cast iron valve, cast steel valve, brass valve, stainless steel valve, thermoplastic valve, titanium valves and so on.

In addition, according to the valve application, there are some special valves, such as low noise valve, diaphragm valve, air lock valve,Corrosion valve, steam control valve, pressure relief valve.

In addition to the actuator and adjustment mechanism, the control valve can also add some accessories to match the action of the control valve, including the valve positioner, hand wheel mechanism, signal conversion device, valve position detection, transmission devices and self-locking devices, these accessories Control valve function more perfect, more convenient to use, more flexible application. By pass system applications such as steam control valves.