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Installation test, adjustment knowledge and structural principle of pneumatic cement butterfly valve

Below we will discuss the installation test, adjustment knowledge, structural principle of cement butterfly valve, the production and sales of professional cement butterfly valve, years of experience, first-class level, west through the following introduction will give you the water butterfly valve, pneumatic cement butterfly valve A new understanding.

1. No matter whether it is manual, pneumatic, hydraulic or electric, all parts are strictly adjusted before leaving the factory. When re-inspecting the sealing performance, the user should evenly fix both sides of the inlet and outlet, close the disc valve and apply pressure to the inlet side. Observe the leakage on the exit side. Before the pipeline is tested for strength, the disc should be opened to prevent damage to the seal pair.

2. Although it has been strictly inspected and tested before leaving the factory, there are also automatic screw displacements of individual products during transportation. It needs to be re-adjusted, pneumatically, hydraulically, etc. Please read the instruction manual of the supporting drive unit.

3. (Electric drive disc valve) The opening and closing stroke of the control mechanism has been adjusted at the factory. In order to prevent the power supply from being turned on, the user should first open the manual to the half-open position after the power is turned on for the first time, and press the electric switch to check the direction of the indicator plate and the valve closing direction.

After having a certain understanding of the test and adjustment knowledge of your butterfly valve, let's describe the structural principle of the cement butterfly valve. The author has matured the principle of the pneumatic cement butterfly valve from many angles, and will know a lot from the heart.

Pneumatic cement butterfly valves consist of pneumatic actuators and butterfly valves. The pneumatic butterfly valve is opened and closed with a circular disc rotating with the valve, so that the pneumatic valve that realizes the action is mainly used as a shut-off valve, and can also be designed to have the function of adjusting or stepping valve and adjusting. The butterfly valve is currently at a low pressure. More and more use on medium caliber pipes.

The pneumatic cement disc of the pneumatic cement butterfly valve is installed in the diameter direction of the pipe. In the cylindrical passage of the pneumatic cement butterfly valve body, the disc-shaped pneumatic cement disc rotates around the axis, the rotation angle is between 0°-90°, and when rotated to 90°, the valve is fully open. The pneumatic cement butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. Moreover, it can be quickly opened and closed by rotating 90°, and the operation is simple, and the valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the pneumatic cement disc is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small, so it has better flow control characteristics. The butterfly valve has two sealing types: a spring seal and a metal seal. Elastomeric sealing valve, the sealing ring can be mounted on the valve body or attached to the periphery of the disc.

Valves with metal seals generally have a longer life than elastomeric seals, but are difficult to seal completely. Metal seals can accommodate higher operating temperatures, while elastomeric seals have temperature-limited defects.

If a pneumatic cement butterfly valve is required for flow control, the main choice is the correct size and type of valve. The structural principle of pneumatic cement butterfly valves is especially suitable for making large diameter valves. Pneumatic cement butterfly valves are widely used not only in general industries such as petroleum, gas, chemical, and water treatment, but also in cooling water systems of thermal power stations.

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