Troubleshooting guide

5
72-001-02 Rev A
2.1 Reagent Head Assembly
The typical reagent head assembly consists of reagent head, diaphragm, and suction and discharge
cartridge check valves. This assembly is the only part of the pump to contact the process liquid;
consequently, maintenance is critical to pump performance.
2.2 Control Assembly
The BLACKLINE
®
pump incorporates a lost motion style of stroke length adjustment to limit
diaphragm travel during the suction portion of each stroke. The stroke length setting is indicated by a
(0% – 100%) scale located on the stroke adjustment assembly.
Stroke length is changed by turning the hand knob. This turns a mechanism, which limits rearward
travel of the diaphragm. Refer to Section 6.4 for further information.
For automatic flow rate control, users can consider the Pulsafeeder VFD speed based control system,
please contact your local Pulsafeeder dealer or representative for more information.
2.3 Gear Ratio Assembly
BLACKLINE
®
pumps are driven by an electric motor mounted on the motor adaptor input flange.
The motor drives a set of worm gears that convert rotational speed into torque. They, in turn, power
the eccentric shaft assembly that converts rotary motion into reciprocating motion.
Figure 2