Why can't the pneumatic butterfly valve open and close tightly?

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Why can't the pneumatic butterfly valve open and close tightly?

TodayXinming automatic control valve industry introduces why pneumatic butterfly valve cannot be opened and closed tightly.

pneumatic butterfly valveIt is composed of pneumatic actuator and butterfly valve. Pneumatic butterfly valve is a circular butterfly plate with the rotation of the valve stem to open and close, in order to achieve the activation of the pneumatic valve, mainly to do the use of cut-off valve, can also be designed to have the function of regulation or cut-off valve and regulation, butterfly valve in low-pressure large and medium-sized diameter pipeline on the use of more and more. Pneumatic butterfly valve classification: stainless steel pneumatic butterfly valve, hard seal pneumatic butterfly valve, soft seal pneumatic butterfly valve, carbon steel pneumatic butterfly valve. The main advantages of the pneumatic butterfly valve are simple structure, small size, light weight, and low cost. The characteristics of the pneumatic butterfly valve are particularly significant. It is installed in a high-altitude tunnel and is controlled by a two-position five-way solenoid valve. The operation is convenient and the flow medium can be adjusted.
     pneumatic butterfly valveThe circular butterfly plate rotating with the valve orange is used for opening and closing, so as to realize the enabling action. The pneumatic valve is mainly used as a block valve, and can also be designed to have the function of regulation or section valve and regulation. The disc valve is used more and more on low-pressure large and medium-diameter pipelines.

Pneumatic butterfly valve is one of the taboos before installation did not carefully read the instructions, then how to properly install the butterfly valve. For the newly constructed pipeline, the impurities in the pipeline should be cleaned up in time before installation to prevent the valve seal from being damaged when the pipeline is opened. During installation, please do not use the actuator part of the valve as a lifting point to avoid damage to the actuator and accessories. Please design a firm support on the welded pipe, and it is strictly forbidden to bear the weight of the pipe by the valve body. Stem vertical, valve plate vertical, upright.

Place the wafer butterfly valve between the pre-installed two special flanges for the wafer butterfly valve, and pay attention to align the flange bolt holes with the round holes of the butterfly valve body. Insert the bolt and nut into the flange hole, connect the valve body with the flange, and correct the flatness inside the valve, but be careful not to tighten the bolt and nut too tightly. The flange is welded to the pipe by spot welding. First remove the butterfly valve. Then the two flanges are completely welded on the pipe to complete the fixation. After the welding place between the pipeline and the flange is cooled down, install the butterfly valve in the wafer. At this time, pay attention to opening the butterfly plate.

Once again on the installation position of the butterfly valve to do a correction, tighten the bolts, but be careful not to screw too tight. Fully open the butterfly plate of the butterfly valve to ensure that the butterfly valve and the butterfly plate can be opened and closed freely. Cross the bolts again and tighten evenly. The above steps are completed, once again on the opening and closing of the butterfly valve to do a test to ensure that the valve can be free to switch. When installing the electric valve, be sure to keep the position of the electric actuator right above the installation pipeline. It is forbidden to install the electric actuator in a vertical direction, otherwise the actuator will be damaged. Before installing the butterfly valve, pay attention to handling and do not bump at will. After installation, non-professionals should not disassemble it at will.

Above isXinming automatic control valve industry to introduce the relevant content.