Flanged expansion butterfly valve

Flanged expansion butterfly valve installed Note:

1, expansion butterfly valves must be placed before the installation, not to bump.

2, stretching the length of butterfly structure of the factory for the minimum length, installation, to install the gap length (that is, the design of the length).

3, when asked the length of pipe over the length of telescopic valve installed, please adjust the pipeline interval, do not forcibly pull telescopic valve, expansion valve so as to avoid damage.

4, flexible butterfly valve can be installed anywhere, so when the temperature compensation in the pipeline installation is complete, take along the pipe axial direction at both ends of stent to prevent the expansion valve telescopic tube pulled out
(See Figure 1), the support bracket according to the following formula force, run-time support is prohibited will be removed.
                    F> ¦Ð / 4 c PS DN (kgf)
Where: PS-pipe test pressure, DN-pipe diameter

5, no temperature compensation telescopic butterfly, the only installation of the replacement, repair the valve when the user can pass bolt spacing, symmetric stretching clamp butterfly valve to prevent the telescopic tube pulled out (see Figure 2), damage to retractable butterfly valves and piping installations or buildings. Diameter bolts in accordance with the diameter of the flange bolts, the bolts bear the intensity and tension test pressure and pipeline, according to the formula, the running time limit is strictly prohibited dismantled Jin-bit bolt (bolt reprovision)

6, pipeline construction site, the demolition of the disintegration of free expansion is strictly prohibited butterfly.

7, the expansion valves, processing fine, with the tight, do not arbitrarily at the scene a short telescopic pressure repeatedly stretched butterfly. Pipeline installation, the requirements at both ends of flexible pipe valve must make a concerted, two-pipe parallel flange requirements.

8, flange fixed fastening bolts to deal with that, do not impose a unilateral fixed fastening bolt flange.

9, telescopic pipe after installation in the valve.