Quote: (Originally Posted by
what2be)
It boosts okay to about 3000, then the cycling gets *very* slow. sometimes a minute or so between cycles. At about 3150-3200 it stops cycling completely.
Anybody have any ideas? The booster has very low hours on it.
Correctme if I'm wrong but the the booster is a 20:1 single stage right?
Then in no way can the inlet boost-gas pressure be the issue, unless its over the wanted end-pressure.
The booster will stall when the output absolute pressure reaches the booste-ratio x drivegas-pressure_absolute. The cycle-speed will depend on inletflow and outlet-flow of drive-gas, so assuming that theres no restriction in the drivegas-lines, and that its boost fine with lower-pressures, it indicates that the drive-gas pressure is too low, and stalling around 3150. Ie. your drivegass is roughly 3150 / 20 = 157 psi'ish.
Increase the pressure to boost beyound that, and make sure the first-stage you use doesnt drop the pressure as soon as a little flow is used; most do, wich can impeede preformance.
Regards
Nicolai