Centrifuge overpressure valve activating - Why?

[erbilabuc]

I heat 20 gallons of oil up to about 130 degrees. Turn valve to allow centrifuge to get up to 80 psi but right away my safety valve goes off. I tried cleaning the centrifuge but found nothing out of ordinary. Only other thing I can think of is clogged lines.

[erbilabuc]

figured it out. My pressure jets were clogged with poly. Nothing like a little centrifuge maintenance when its 40 degrees to wake you up.