CAUTION:
Do not apply compressed air to the
exhaust port — pump will not function.
CAUTION:
Do not over lubricate air supply
— excess lubrication will reduce pump
performance.
TEMPERATURE LIMITS:
Polypropylene
0°C to 79°C
32°F to 175°F
PVDF
–12°C to 107°C
10°F to 225°F
PTFE PFA
7°C to 107°C
20°F to 225°F
Neoprene
–17.7°C to 93.3°C
0°F to 200°F
Buna-N
–12.2°C to 82.2°C
10°F to 180°F
EPDM
–51.1°C to 137.8°C –60°F to 280°F
Viton
®
–40°C to 176.7°C –40°F to 350°F
Wil-Flex™
–40°C to 107.2°C –40°F to 225°F
Sanifl ex™
–28.9°C to 104.4°C –20°F to 220°F
Polyurethane
–12.2°C to 65.6°C
10°F to 150°F
PTFE
4.4°C to 104.4°C 40°F to 220°F
Tetra-Flex™ PTFE 4.4°C to 107.2°C 40°F to 225°F
CAUTION:
When choosing pump materials, be
sure to check the temperature limits for all wetted
components. Example: Viton
®
has a maximum
limit of 176.7°C (350°F) but polypropylene has a
maximum limit of only 79°C (175°F).
CAUTION:
Maximum temperature limits are
based upon mechanical stress only. Certain
chemicals will signifi cantly reduce maximum safe
operating temperatures. Consult engineering
guide for chemical compatibility and temperature
limits.
CAUTION:
Always wear safety glasses when
operating pump. If diaphragm rupture occurs,
material being pumped may be forced out air
exhaust.
Plastic series pumps are made of virgin plastic
and are not UV stabilized. Direct sunlight for
prolonged periods can cause deterioration of
plastics.
WARNING:
Prevention of static sparking — If
static sparking occurs, fi re or explosion could
result. Pump, valves, and containers must be
grounded when handling fl ammable fl uids and
whenever discharge of static electricity is a
hazard.
CAUTION:
Do not exceed 8.6 bar (125 psig) air
supply pressure.
CAUTION:
Before any maintenance or repair is
attempted, the compressed air line to the pump
should be disconnected and all air pressure
allowed to bleed from pump. Disconnect all
intake, discharge and air lines. Drain the pump
by turning it upside down and allowing any fl uid
to fl ow into a suitable container.
CAUTION:
Blow out air line for 10 to 20 seconds
before attaching to pump to make sure all
pipeline debris is clear. Use an in-line air fi lter. A
5µ (micron) air fi lter is recommended.
NOTE:
When installing PTFE diaphragms, it is
important to tighten outer pistons simultaneously
(turning in opposite directions) to ensure
tight fi t.
NOTE:
P4 PVDF and PFA pumps come standard
from the factory with expanded PTFE gaskets
installed in the diaphragm bead of the liquid
chamber, in the T-section and in the ball and seat
area. PTFE gaskets cannot be re-used. Consult
PS-TG for installation instructions during
reassembly.
NOTE:
Before starting disassembly, mark a line
from each liquid chamber to its corresponding air
chamber. This line will assist in proper alignment
during reassembly.
CAUTION:
The P4 Plastic pump is not
submersible. If your application requires your
pump to be submersed, the PX4 model can be
used.
CAUTION:
Pumps should be fl ushed thoroughly
with water before installation into process line.
CAUTION:
Tighten all hardware prior to
installation.
S e c t i o n 1
C A U T I O N S — R E A D F I R S T !
WIL-10161-E-01
1
WILDEN PUMP & ENGINEERING, LLC
