User Guide

3130
For BlackStone Pumps
An LED indicator will light up each time a
stroke begins.
Operating Pressure and Back Pressure
Operating pressure is a combination of back
pressure plus all of the other resistances to
flow present in your system.
BlackStone Pumps are designed to dose
their rated output at the operating ( rated )
pressure.
Therefore, rated pressure of the pump you
install should be close to operating pressure
present in the system.
Too little back pressure can cause the pump
to overdose.
To prevent this from happening on a low
back pressure installation, a spring has been
added to the discharge/anti-siphon valve as-
sembly (HI 721004).
When pumping into a high back pressure,
the spring should be removed.
50
60
40
STROKE
30
70
20
80
90
10
0
100
FLOW RATE %
MODEL:
OUTPUT:
BL3-12
3L/H
12 BAR
OPERATIONAL GUIDE
STARTUP
At startup, purge all chemical gases and air
from the suction tubing, valves and pump
head. Start the pump.
When all the air or gas is vented, the solu-
tion being metered will appear in the output
line.
Note: only when operating under pressure,
the pump must be started unloaded.
For BL7914 only:
Set the pump flow rate capacity by
turning the Liters/Hour knob on the
face of the pump.
The selectable rates are:
• 2.0 lph (0.53 gph) @ 1 bar (14.7 psi)
• 5.1 lph (1.33 gph) @ 1 bar (14.7 psi)
• 8.8 lph (2.29 gph) @ 1 bar (14.7 psi)
• 11.7lph (3.04 gph) @ 1 bar (14.7 psi)
For all models:
An external Flow Rate Control (potentiom-
eter) on the face of the pump allows to
adjust the flow up to 100% of the pump's
rated capacity.
BlackStone Pumps BL7913/BL7914
10
5
215
LITRES/HOUR
50
60
40
30
70
20
80
90
10
0
100
FLOW RATE %
50
60
40
30
70
20
80
90
10
0 100
FLOW
%