PFD2/PFS2 – OPERATING INSTRUCTIONS
INDEX
DATE
N°
03
26/06/01
DC02020US
4/11
III.3.2 – Fluid connections
The pump is self-priming. The inlet is at the bottom and the outlet at the top.
The reference of your pump is PFD2 316 or PRS2 316. It is supplied with flared fittings suitable for
5/8"x3/4" (16x19 mm)
TEFLON
®
tube. The tube needs to be flared prior to fitting using SGPPL ASTI
Forming Tool (P/N MF11622).
Both the inlet and outlet fittings can be turned over if necessary, by removing the nuts on the inlet and
outlet manifolds (P/N 2749M and 2750M). Re-tighten the nuts by hands.
If your pump is marked "
W
", and you wish to change the side of the inlet and/or outlet manifolds, you
must
absolutely
change the PFA seals (washers, P/N 2587) located deep in the groove at the same
time. Proceed as follows:
1) Remove the washers (with an air spray gun),
2) Fit the new washers in their grooves (a set of exchange seals is supplied with the pump:
P/N WWES KIT S2),
3) Install and tighten the manifolds with a strap wrench (while tightening, you may here a bang).
III.4 – Initial Tests and Adjustments
Before commissioning the pump, we recommend to test it dry with a supply pressure of 72.5 PSI
(5 bar), to ensure the system works correctly (See III.3.1 for the correct connections).
If the pump is cycling too quickly reduce the speed by adjusting the needle valve.
Before using the pump with chemicals please check:
•
The body rings (P/N 2742) and the 4 manifold nuts are tight,
•
The air/nitrogen supply is dry, clean and between 29 and 72.5 PSI (2 and 5 bar),
•
The inlet and outlet fluid connections are correctly fitted and tight.
IV – Applications
IV.1 – Chemical compatibility
All PFD/PFS pump wetted parts are manufactured in
TEFLON
®
PTFE and PFA and are suitable for
pumping even the most corrosive concentrated chemicals: H
2
SO
4
, HNO
3
, HF, H
3
PO
4
, HCl, NH
4
OH,
KOH, NaOH, CH
3
COOH, TMAH, H
2
O
2
...
The viscosity of the liquids must be less than 1000 cpo.
PFD/PFS pumps can pump liquids containing particles up to 0.02" (0.5 mm). Very abrasive liquids
are not recommended.
Please call either the factory or your local distributor if you require information on chemical
compatibility.
IV.2 – Contamination
The "all plastic" construction of the PFD/PFS pump ensures no ionic contamination of the chemical,
even if there is a bellows failure.
Due to the low frequency and amplitude of the bellows pump, SGPPL ASTI guarantees a lower level
of particle contamination when compared to a diaphragm pump.
IV.3 – Temperature Range
The pump can handle liquids from 32°F (0
°
C) up to +212°F (100
°
C).
When the fluid temperature is greater than 140°F (60
°
C) you must frequently check that the body
rings (P/N 2742) and the manifold nuts are fully tight and that supply pressure is less than 43.5 PSI
(3 bar).
For special applications call SGPPL ASTI or your local distributor.
