DavidScott1
Mechanical
- Feb 21, 2007
- 2
I have a problem with some 3 inch butterfly valves. The body is made from polypropylene, with a butterfly made of HDPE. It contains a circumferential nitrile seal.
The system pumps wine up to a dynamic pressure of 80kPa. The valve is tested to 100kPa and passes. However, after approx 12 months some of them start to leak and fail to provide a tight shut off.
We are struggling to get to the root cause and suspect it is more than one. We do not have much valve experience in the company and the suppliers are not helpful. We are investigating sharp particles but I read about a potential issue with hydrocarbons. Can you point us in the right direction as to what we should investigate ? Many Thanks.
The system pumps wine up to a dynamic pressure of 80kPa. The valve is tested to 100kPa and passes. However, after approx 12 months some of them start to leak and fail to provide a tight shut off.
We are struggling to get to the root cause and suspect it is more than one. We do not have much valve experience in the company and the suppliers are not helpful. We are investigating sharp particles but I read about a potential issue with hydrocarbons. Can you point us in the right direction as to what we should investigate ? Many Thanks.