DEMA Flex Flow Quick Start Manual page 7

Setup
Priming
Priming – Plug in pump and set stroke knob to 100%
(To avoid damage to the pump, this adjustment should only be
made while pump is running at a high stroking rate.)
If fluid begins moving up suction line while pump is operating
No further priming is required.
If fluid is not moving, open bleed valve approximately 1 turn
Until fluid begins to move. When suction line fills, close bleed
valve.
Do not over tighten bleed valve. Damage my occur