Minimum Flow to Lift a Check Valve
Minimum Flow to Lift a Check Valve
(OP)
Colleagues,
I have a question regarding minimum flow required to lift a check valve in nitrogen gas service. I am using a rotameter with a needle valve to set a low flowrate (1 SCFH) to sweep a seal chamber at a pump seal. Due to the risk of backflow into the nitrogen header, we have to install a check valve downstram of the rotameter. Can 1 SCFH of nitrogen in a 3/4" line be enough to lift a check valve? Are there any guidelines I could follow?
I would really appreciate your input,
more22
I have a question regarding minimum flow required to lift a check valve in nitrogen gas service. I am using a rotameter with a needle valve to set a low flowrate (1 SCFH) to sweep a seal chamber at a pump seal. Due to the risk of backflow into the nitrogen header, we have to install a check valve downstram of the rotameter. Can 1 SCFH of nitrogen in a 3/4" line be enough to lift a check valve? Are there any guidelines I could follow?
I would really appreciate your input,
more22





RE: Minimum Flow to Lift a Check Valve
A better idea could be to install a check valve that works like a float i.e. a ping pong ball that would begin to float and close the nitrogen inlet line as soon as there is back-flow. This means that the check valve is installed in an unconventional way which ensures unrestricted nitrogen flow.
remove.marius@mailbox.co.za
RE: Minimum Flow to Lift a Check Valve
RE: Minimum Flow to Lift a Check Valve
Good Luck,
Doug
RE: Minimum Flow to Lift a Check Valve