S
Dear List,
I have a question that maybe someone can help me with.
I have been asked to calculate a test result where a casting is pressurized and then a flow transducer output is monitored to determine
if there is flow through the casting above a certain level.
It looks basically like this:
15PSI >-----------[Flow =
Transducer]--------------------[Casting]----------------[leakage to
atmosphere......
If there is a leak the air will pass through the casting wall into atmospheric pressured air.
I have the ability to control the amount of orifice opening at the Flow Transducer via an analog driven valve. Range is 0 - 50 mL/minute.
I am looking for a leakage level of 15 mL/minute.
My question is how to calculate what that leak of 15 mL into atmospheric pressure will look like at the Flow Transducer with 15PSI behind it and
basically 15PSI on the other side. I could throttle back the flow rate through the transducer thus creating a pressure drop on the test side but I think the basically equal pressures will give me a different flow rate at the transducer than what I have flowing into static. Am I thinking right on this? I welcome your input on this.
Sid Roberts
I have a question that maybe someone can help me with.
I have been asked to calculate a test result where a casting is pressurized and then a flow transducer output is monitored to determine
if there is flow through the casting above a certain level.
It looks basically like this:
15PSI >-----------[Flow =
Transducer]--------------------[Casting]----------------[leakage to
atmosphere......
If there is a leak the air will pass through the casting wall into atmospheric pressured air.
I have the ability to control the amount of orifice opening at the Flow Transducer via an analog driven valve. Range is 0 - 50 mL/minute.
I am looking for a leakage level of 15 mL/minute.
My question is how to calculate what that leak of 15 mL into atmospheric pressure will look like at the Flow Transducer with 15PSI behind it and
basically 15PSI on the other side. I could throttle back the flow rate through the transducer thus creating a pressure drop on the test side but I think the basically equal pressures will give me a different flow rate at the transducer than what I have flowing into static. Am I thinking right on this? I welcome your input on this.
Sid Roberts