How to calculate time required to open a valve to inflate a balloon?

05 May 2019 1 9K Report

I have a canister (0.15L Volume). This will be filled with compressed air.

A solenoid valve attached has a diameter of 2mm, and the air will flow through this into a pipe which leads to a balloon. The pipe diameter is 3mm, with a length of 300mm.

The pressure required to inflate the balloon past it's elasticity is 1psi, I believe.

My question is how do I calculate how long I'll need to open the valve for enough pressure to get through to pump the balloon to that point?

Syed Mughees Ali

Dear Josh,

Information provided is incomplete. To calculate the time we need to know the pressure variation of gas in the canister. Also the pressure of the in tube after expansion. After that, by applying mass balance equation we can calculate the time required.

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