News - Ball Selection Application

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Home > News > Ball Selection Application

Ball Selection Application - 2013-12-16 10:35:17

Ball valve is a plug evolved. It has the same rotated 90 degrees to mention is the cock body is a sphere , a circular through -hole or channel through its axis . Sphere and the ratio of openings should be such that when the ball is rotated 90 degrees , in the import and export of office should be fully rendered sphere , thus cutting off the flow.

Just use the rotary ball valve operation and a small 90-degree rotational torque can be closed tightly . Full equality body cavity for the media provides little resistance, through the flow channel. Generally considered the most suitable valve opening and closing done directly used, but recent development has been designed so that it has the ball and control the flow restrictor purposes. The main features of valve itself is a compact structure, easy operation and maintenance for water, solvents, acids and gas work in general media , but also for the poor working conditions of media , such as oxygen , hydrogen peroxide , methane and ethylene. The ball valve may be integral or may be modular .

Backflow valve to prevent the media selected by

The role of this type of valve is only allowed media to flow in one direction , and stop the flow direction . This valve is normally work automatically , in a direction of flow of fluid pressure effect , the valve opening ; opposite direction of fluid flow from the fluid pressure and the valve flap from the coincidence effect in the valve seat to cut off flow. Check them belonging to this type of valve, which includes swing check valves and lift check valves . Swing check valves have ordinary hinge , there is a door on the same freedom leaning tilt valve seat surface . In order to ensure proper valve position every time to reach the surface of the valve seat , the valve design in the hinge mechanism , so that the valve has enough to swing space , and make a real flap valve , comprehensive engagement with the valve seat. Valve can all be made of metal can also be embedded in the leather , rubber on metal, or synthetic coverage , depending on performance requirements. Swing check valve in the fully open position, the fluid pressure is almost unimpeded , so by the pressure drop is relatively small valve . Lift check valve is located on the valve sealing surface located in the seat . Addition to this valve disc is free to lift, the other part of the same as the cut-off valve , the fluid pressure from the valve seat sealing surface of valve lift , medium return valve flap led to a seat , and cut off the flow. Depending on conditions , the valve can be all metal construction, can also be embedded in the form of rubber or rubber ring in the valve holder. Pneumatic valve as the cut-off valves, fluid passage through the lift valve is narrow , so through the lift valve pressure drop than the bigger swing check valve , swing check valves and flow being the very few restrictions.

Medium parameters by adjusting the valve selection

In the production process , to the pressure medium flow and other parameters meet the process requirements, the need to install the adjusting mechanism for adjusting the above parameters . The main principle of regulating bodies , by changing the flow area of the valve is the valve between the valve and valve seat , to achieve the purpose of adjusting the parameters . Such valves are referred to as control valves , which is divided into relying on the media itself is called a self- powered drive control valve such as valve, regulator valve, all leading up power -driven ( such as electricity , compressed air, Air Operated valve and fluid power ) as he was driving the control valve , such as electric control valve, pneumatic control valves and hydraulic control valve.

Keywords:butterfly valve ,knife gate valve,ball valve,globe valve,slurry gate valve

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