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6 308550
Installation
Grounding
FIRE AND EXPLOSION HAZARD
This pump must be grounded. Before
operating the pump, ground the system
as explained below. Also, read the sec-
tion FIRE AND EXPLOSION HAZARD,
on page 4.
Polypropylene and PVDF are not conductive.
Attaching the ground wire to the grounding lug will
ground only the air motor. When pumping conduc-
tive flammable fluids, always ground the entire
fluid system by making sure the fluid has an electri-
cal path to a true earth ground. See Fig. 1.
Never use a polypropylene or a PVDF pump with
non-conductive flammable fluids as specified by
your local fire protection code.
US Code (NFPA 77 Static Electricity) recommends
a conductivity greater than 50 x 10
–12
Siemans/me-
ter (mhos/meter) over your operating temperature
range to reduce the hazard of fire. Consult your
fluid supplier to determine the conductivity or
resistivity of your fluid. The resistivity must be less
than 2 x 10
12
ohm-centimeters.
WARNING
To reduce the risk of static sparking, ground the pump
and all other equipment used or located in the pumping
area. Check your local electrical code for detailed
grounding instructions for your area and type of equip-
ment.
Ground all of this equipment:
D Air Motor: Connect a ground wire and clamp as
shown in Fig. 1. Loosen the grounding screw (W).
Insert one end of a 12 ga (1.5 mm@) minimum
ground wire (Y) behind the grounding screw and
tighten the screw securely. Connect the clamp end
of the ground wire to a true earth ground. Order
Part No. 237569 Ground Wire and Clamp.
NOTE: When pumping conductive flammable fluids
with a polypropylene or a PVDF pump, always ground
the entire fluid system. See the WARNING on page
6.
D Air and fluid hoses: Use only electrically conductive
hoses.
D Air compressor: Follow the manufacturer’s recom-
mendations.
D All solvent pails used when flushing: Follow the
local code. Use only metal pails, which are conduc-
tive. Do not place the pail on a non-conductive
surface, such as paper or cardboard, which inter-
rupts the grounding continuity.
D Fluid supply container: Follow the local code.
Fig. 1
Y
W
02646
B