telescopic butterfly valve is suitable for the temperature of 80 ° C or less, nominal pressure of food, medicine, chemical industry, petroleum, electric power, textile, paper and other water supply and drainage and the regulation of the flow and intercept medium pipeline. ≤1. 6MPa。 The cold function. Its main characteristics are as follows: 1, design reasonable, unique structure, light weight, convenient operation, opening and closing fast. 2. In addition to regulating and truncation function, telescopic butterfly valve can also be compensation pipeline temperature difference caused by thermal expansion and contraction, can also convenient installation and replacement of the valve. 3, adjustable seal, replace, sealed performance is reliable. Telescopic butterfly valve installation and use of the note 1. Telescopic butterfly valve before installation must be flat. Don't crash it. 2. When is the length of the telescopic butterfly valve factory, the minimum length. When installation, pull it to install length ( The design length) 。 3. When the length of the pipeline between over expansion valve installation length, please adjust the pipe spacing. Don't force expansion valve, so as not to damage the expansion valve. 4. Can install telescopic butterfly valve at any time. For temperature compensation, the pipe installation is completed, must add bracket on both ends of the pipe axis, in order to prevent the expansion valve was pulled out. Support support according to the following formula. Unload stents. 5. When the telescopic butterfly valve is not used for temperature compensation, only when installation and replacement, the valve is easy to use, butterfly valve can be used to limit, telescopic butterfly valve can be symmetric clamping prevent damage of telescopic tube was pulled out and telescopic butterfly valve and pipe unit or building. The diameter of the bolt can be according to the flange bolt diameter, bolt intensity and test pressure and tension pipelines to calculate. It is based on the above formula. In the process of operation is not allowed to remove the limit bolts ( With separate bolt) 。 6. It is forbidden to remove pipe construction site sealed, telescopic butterfly valve. 7. Processed, telescopic butterfly valve. Don't repeatedly stretching and stretching telescopic butterfly valve at the scene. Installation line, expansion valve on both ends of the pipe must be concentric, two flange surface must be parallel to the pipeline. 8. Tighten the flange fixed bolts should be symmetry. Don't forced tighten the flange fixed on one side of the bolt. 9. Telescopic pipe installed behind the valve. 10. Telescopic part of the expansion valve shall not be installed in the corner of the pipe or pipe end.

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