Highly-Reactive/Moisture-Sensitive Iso Catalyst Pd2K Pumps - Graco ProMix PD2K Installation Manual

ISO Oil Oil Fill Fill Procedure Procedure
ISO ISO Oil Fill Procedure
When using polyurethane coatings with isocyanate
catalysts in high-humidity environments, use of ISO
oil on the catalyst pump TSL cup is recommended
instead of TSL. The ISO oil will present a barrier
that will prevent catalyst hardening from contact with
moisture. When performing the first fill of a cup with
ISO oil, it will be necessary to bleed the air out of the
feed line.
NOTE: If not already present on the TSL cup, draw
NOTE: NOTE:
the two horizontal lines at, and slightly above, the
vertical center of the front of the cup before filling.
To bleed air:
1. Fill the catalyst pump TSL cup to the lower
horizontal line.
2. Remove one plug (73d) from the upper throat
cartridge and allow air in that area to flow until no
air is being expelled. Replace the plug.
3. Repeat step 2 at the lower throat cartridge.
4. Use absorbent rags to clean up excess ISO oil
that escaped from the plug holes.
5. Replenish the ISO oil level in the TSL cup to the
lower horizontal line.
332457M
Alternate TSL TSL Plumbing Plumbing for
Alternate Alternate TSL Plumbing
Highly - - - Reactive/Moisture Reactive/Moisture - - - Sensitive
Highly Highly Reactive/Moisture
ISO Catalyst ISO ISO Catalyst Catalyst PD2K PD2K Pumps PD2K
NOTE: NOTE: NOTE: Graco recommends this alternate TSL (Throat
Seal Liquid) plumbing installation only on Catalyst
pumps, as the open rod guard of resin pumps does
not generate TSL displacement.
The alternate TSL plumbing of the Catalyst pump
allows TSL to flow through the upper seal and
bearing cartridge by using the rod guard and
lower-rod displacement. This flow purges isocyanate-
and moisture- contaminated TSL from the throat
area; preventing the crystallization reaction of the
isocyanate and moisture from accumulating and
damaging the pump seals, displacement rod, and
bearings.
1. Replace a plug (73d) with a barbed fitting (73b)
on a second port of the pump's upper throat
cartridge (only one will be plugged). Check that
the o-ring is in place on the barbed fitting (73b).
Apply low-strength thread adhesive and install
the fitting in the upper throat cartridge port. Be
sure the third port is plugged (73d).
TSL Cup Kit
for
for
Sensitive
Sensitive
Pumps Pumps
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