Page 12 of 52
Hydraulic Bypass Valve (HBV)
– this valve protects the pump
from over-pressurization by relieving any excess pressure in the
pump’s hydraulic system. The valve is preset based on
customer’s specification, typically adjusted to 10% above the
system pressure. The sight glass above the valve allows visual
aid to observe the operation.
Designed to protect the pump only, does not provide
an overall system protection.
Figure 11
Manual Control/Stroke Adjustment
The PulsaPro pump flow rate is adjusted by changing the stroke length on a scale from 0 – 100%. The
stroke is adjusted by turning the control knob to the desired setting. The stroke length percentage is
denoted by a scale located at the top of the hand wheel. There is a locking screw that is used to lock
the stroke setting.
THE LOCKING SCREW MUST BE USED TO MAINTAIN THE STROKE SETPOINT. FAILURE TO
DO SO MAY RESULT IN DRIFTING OF SETPOINT DURING OPERATION.
Figure 12
