Flange retractable butterfly valve installation notes and precautions

The retractable flange butterfly valve is suitable for the temperature â‰¤ 80 Â°C, used in petroleum, chemical food and pharmaceutical light textile, papermaking, electric power, water supply and drainage, and gas pipelines. It regulates the flow and shuts off the medium and has the function of compensating the thermal expansion and contraction of the pipeline. 1, the design is new, reasonable, unique structure, light weight, easy operation, starting and closing quickly.

Retractable flange butterfly valve installation and use matters needing attention

1. The retractable flanged butterfly valve must be placed flat before installation and must not be bumped;
2. The length of the structure of the retractable flanged butterfly valve at the time of delivery is a small length. When it is installed, it is pulled up to the installation length (that is, the design length);
3. When the length of the pipeline exceeds the installation length of the retractable valve, please adjust the interval between the pipes. Do not force the retractable valve to avoid damage to the retractable valve.
4. The retractable flanged butterfly valve can be installed at any position. When doing temperature compensation, after the pipeline is installed, it is necessary to add brackets along both ends of the pipeline axis to prevent the telescopic pipe from being pulled out (see Figure 1). According to the following formula, it is forbidden to remove the bracket during operation; Please transfer from the valve forum. ! !
Where: PS pipe test pressure, DN a pipe diameter

5, retractable flange butterfly valve does not do temperature compensation at the same time, only to do the installation and replacement, maintenance of the valve is convenient, available through the bolt limit, symmetrical clamping retractable flange butterfly valve to prevent the telescopic tube pulled out (see Figure 2), damaged telescopic butterfly valve And pipeline installations or buildings. The bolt diameter can be calculated according to the above formula according to the flange bolt diameter, its bolt strength and the withstand test pressure and the pipe tensile force, and the limit bolt is forbidden to be removed during operation (the bolt is to be equipped with another);
6. It is forbidden to dismantle the dismantled retractable flanged butterfly butterfly valve at the pipeline construction site;