Talk Composites - The Forum for Advanced Composites

Leakage when shutting off the vacuum pump

http://www.talkcomposites.com/Topic23699.aspx

By Dezer - 7/28/2017 1:09:43 PM

Hi Guys,

I have a problem in my vacuum infusion process, with the vacuum pump turned on the pressure is constantly at 0.9 atm, but if I turn off the vacuum line the pressure starts to drop. I have already looked for microwaves and can not find anything.

Is it a problem for me to infuse the part and keep the pump running constantly until the healing time?
By Fasta - 8/14/2017 10:03:18 AM

It can also be the pump itself.
Without any mechanism to hold vacuum I have seen some pumps run  backwards for a bit when turned off.

I have a one way valve right on the pump.