Body Crack Questions
- Butterfly Valves
- The valve body of the butterfly valve was cracked.
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① When the butterfly valve is pushed in a narrow space between the pipe flanges, the valve body may be cracked.
When installing the valve, use jack bolts as needed to adjust the space between the pipe flanges.
At this time, allow 6 to 10 mm extra space between the pipe flanges compared to the space between the valve surfaces and then insert the valve.② When the butterfly valve is installed without the proper alignment of the upstream pipe with the downstream pipe, the valve may be exposed to excessive stress, leading to cracking of the valve body. When installing the valve, be sure to align the center of the valve with that of the pipes.
③ If the bolts are tightened unevenly, excessive stress may be locally applied, leading to cracking of the valve body.
Do not tighten the bolts at a time to avoid uneven tightening. Tighten the bolts evenly and alternately in a star pattern.Refer to our operation manual for more details on valve installation.
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