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GENERAL DESCRIPTION
BlackStone pumps are equipped with a single
control for pump output.
Flow range is continuously adjustable from 0
to 100% of the maximum capacity through a
graded dial on the front of the pumps.
Seven models are available, each with a dif-
ferent dosing capacity:
BL 20
18.3 lph (4.8 gph) @ 0.5 bar (7.4 psi)
BL 15
15.2 lph (4.0 gph) @ 1 bar (14.5 psi)
BL 10
10.8 lph (2.9 gph) @ 3 bar (43.5 psi)
BL 7
7.6 lph (2.0 gph) @ 3 bar (43.5 psi)
BL 5
5.0 lph (1.3 gph) @ 7 bar (101.5 psi)
BL 3
2.9 lph (0.8 gph) @ 8 bar (116 psi)
BL 1.5
1.5 lph (0.4 gph) @ 13 bar (188.5 psi)
High quality materials
To provide the maximum protection for parts
that are in contact with aggressive chemi-
cals, diaphragms, hose connectors and pump
heads are produced using materials as PVDF
and PTFE.
Always store chemicals in safe, out of reach
places. Follow the directions for use with
each chemical. Do not assume chemicals
are the same because they look alike. Hanna
Instruments cannot be held responsible for
the misuse of chemicals or the pump.
Always wear protective clothing (gloves and
safety glasses) when working near chemical
dosing pumps. When pumping chemicals,
make sure all tubes are securely attached to
the fittings. It is recommended that tubing is
shielded to prevent possible injury in case
of rupture or accidental damage.
Avoid using a pipe wrench or pliers on plas-
tic parts and connectors. These are best
tightened with an open end or crescent
wrench. Avoid overtightening these parts
as this could cause damage to the seats
and threads.
If a hose is used, it should be securely
fastened to columns, walls, braces, etc. This
will ensure that the hose connection will re-
main tight and leak free. Shield the hose
from direct sunlight. Sunlight can cause an
autocatalytic reaction with some chemicals
and weaken the hose walls.
The arrow on the pump head indicates the
direction of chemical flow and should al-
ways point upwards (vertically). Never posi-
tion the pump horizontally with suction and
discharge valves horizontal. Locate the pump
in an area out of the reach of children and
pets.
All pumps undergo stringent tests to ensure
that they comply with their stated specifica-
tions and are calibrated at the maximum
rated pressure.
