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SHURflo Operating Instructions, Performance,
Specifications and Parts Manual
SHURflo Corrosion-Resistant Pedestal Centrifugal Pumps
®
Noryl
Series and Polypropylene Series
Figure 5 - Seal Install
Water-Flushed Seals
1. Water-flushed seals are recom-
mended for abrasive solutions,
high temperature service, or when
pumps may be run dry or against
deadhead conditions.
2. When conditions cause the pumped
liquid to form crystals, or if the
pump remains idle for a period of
time without adequate flushing, a
water-flush seal system is advised.
3. The water flush will provide decon-
tamination of chemicals on elas-
tomers and seal and seat faces,
while providing lubrication required
for start-up. Two (2) methods of
water flush can be used:
a. Direct Plumbing to City Water
This provides the best possible
approach to flushing the seal and
seat faces. Caution must be taken
to conform to local city ordinances
that may require backflow preven-
ters. These are a series of check
valves required to prevent contam-
ination of city water if the water
supply is shut off. Also be aware of
the addition of water into the
chemicals pumped where some
imbalance may be created, altering
the chemical's formulation and
aggressiveness.
Form L-4074 (12/09)
b. The flush port is provided on the
side of the pump below the dis-
charge.
c. Recirculation of Solution Pumped
This system takes a bleed off the
pump discharge and recirculates
the solution in the seal chamber.
Although not nearly as effective as
the direct water flush, it will
provide cooling to the seal and
seat faces under operation. This
system is not effective where
crystalization occurs or for pumps
in idle conditions.
8
Noryl and Polypropylene Models
Figure 6 - Seal Install Tool
For internal recirculation to seal,
drill the recess plug on the pump
body located at 3 o'clock with a
1/8" drill.
4. Always drain and flush the pump
before servicing, disassembling
for any reason or returning the
unit for repair.
5. Never store pumps containing
hazardous chemicals.
6. Before returning the pump for
service/repair, drain out all liquids
and flush the unit with a neutraliz-
ing liquid. Then, drain the pump.
Attach a tag or include a written
notice certifying that this has been
done. Please note that it is illegal
to ship or transport any hazardous
chemicals without United States
Environmental Protection Agency
Licensing.
Hazardous
substance alert!
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