composite exhaust valve is how to work? Its structural characteristics and how?

1, the working principle of the

composite exhaust valve is automatically stop backflow valve. Composite exhaust valve opening and closing device is under the effect of fluid pressure difference. When entry point higher than the outlet pressure, fluid flow to the outlet from the entrance to the end. When the inlet side of the pressure is lower than the export pressure, on the other end of the lifting device in fluid pressure difference, under the action of gravity factors such as automatically shut down, to prevent fluid backflow.

2, types and features of

composite exhaust valve is generally divided into cut type, door type, rotary and open several types, etc.

cut check general similar to the structure of the cut-off valve, the structure of the lifting and closing device move up and down along the center line of the channel. Movement is reliable, but resistance, suitable for the occasion of light, small diameter. As a combined exhaust valve has two kinds of once-through and inclinedflow. Dc type composite exhaust valve can only be installed in a horizontal line, and oblique flow cut compound exhaust valve generally installed in a vertical pipe lines. Can be made into a low-speed closed multi-function hydraulic control valve, etc.

slapping gate compound exhaust valve opening and closing device around the axis of rotation 0 90 degrees, opening and closing. Fluid resistance is generally less than the resistance of lift check valve. Suitable for large diameter. Composite exhaust valve according to the quantity of opening and closing can be divided into three types: single swing, two-door and different departments. Composite exhaust valve generally applicable to medium caliber. Of large diameter pipeline in a single swing type when the exhaust valve, slow close composite exhaust Industrial Valves can be used to reduce the water hammer pressure. Two-door flap valve check valve is suitable for the Yu Dazhong diameter pipe. Small two-door exhaust valve is a kind of composite structure, light weight of the rapid development of the check valve. Many complex exhaust valve is suitable for large diameter pipeline.

rotate composite exhaust valve ball and butterfly. Opening and closing parts 0 - revolve around stem 90 degrees to open and close. Wing structure similar to butterfly valve, also have a single butterfly plate, double butterfly plate, also can be made into pipeline valve, automatic hydraulic valve, rotating slowly closing valve ball valve, etc. Simple structure, small flow resistance, water hammer pressure is small. Suitable for large diameter.

open composite exhaust valve is closed and winding structure in the form directly. Open-close part is made from rubber. With a small flow resistance, simple structure, low cost, etc. They are imported from abroad, has been widely used in China in recent years. However, opens the mouth to the use of composite exhaust valve temperature and pressure is limited by a rubber material, mainly used for low pressure situation.

3, over-current components and operator

when the fluid flow through different types of compound exhaust valve parts and lifting device, the fluid flow state change is very big, the energy of the flow resistance loss also have very big difference.

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