3
WILDEN PUMP & ENGINEERING, LLC
SECTION 3
WILDEN UNITEC™
CONDUCTIVE PLASTIC PUMPS
CAUTIONS – READ FIRST!
CAUTION:
This pump is designed to run only on clean-dry
air at all times. If oil and water may migrate into pump from
air supply, a desiccant dryer must be installed.
CAUTION:
Do not lubricate air supply — lubrication will
reduce pump performance.
TEMPERATURE LIMITS:
Polyethylene
0.0°C to 70.0°C
32°F to 158°F
Nordel
®
–51.1°C to 137.8°C
–60°F to 280°F
Teflon
®
PTFE
4.4°C to 120°C
40°F to 248°F
NOTE:
Conductive and unfilled plastics have the same
temperature range and chemical resistance.
CAUTION:
When choosing pump materials, be sure to
check the temperature limits for all wetted components.
Example: Nordel
®
has a maximum limit of 137.8°C (280°F)
but polyethylene has a maximum limit of only 70.0°C (158°F).
CAUTION:
Maximum temperature limits are based upon
mechanical stress only. Certain chemicals will significantly
reduce maximum safe operating temperatures. Consult
Wilden Chem Guide (E-04) for chemical compatibility and
temperature limits.
CAUTION:
Always wear safety glasses and appropriate
protection when operating pump. If diaphragm rupture occurs,
material being pumped may be forced out air exhaust.
WARNING:
Prevention of static sparking — If static spark-
ing occurs, fire or explosion could result. Pump, valves, and
containers must be grounded when handling flammable
fluids and whenever discharge of static electricity is a
hazard. To ground a UX series pump, utilize the marked
grounding point on the face of the pump and connect to
suitable grounding location. As each application has differ-
ent requirements, please consult the local, regional or
government regulatory agency for details on proper ground-
ing for the application.
CAUTION:
Do not exceed 7 bar (100 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. Before
disassembly of the pump, or removal from process lines, all
pressure must also be bled from the liquid side of the pump
and all fluid drained into a suitable container. Failure to do so
may result in product under pressure being sprayed from
system.
CAUTION:
Blow out air line for 10 to 20 seconds before
attaching to pump to make sure all pipeline debris is
clear. A 5µ (micron) in-line air filter is recommended.
CAUTION:
When installing diaphragms, be sure to insert
the shaft stud into the outer piston first, tightening with a
hex head wrench. Then proceed to install diaphragms on
the end of shaft by rotating both diaphragms clockwise. If
diaphragms are hand-tight on the shaft and the bolt holes
do not line up, attempt to continue rotating clockwise until
holes align, if possible. Reverse rotation to align holes only
if it is impossible to align holes through clockwise rotation.
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 UX conductive plastic pumps are not
submersible. If your application requires your pump to be
submersed, contact the factory for details on a different
Wilden pump model.
CAUTION:
Pumps should be flushed thoroughly with water
before installation into process line.
CAUTION:
Tighten all hardware prior to installation.
CAUTION:
Conductive resins may have up to 2% carbon fill-
ing. Ensure your process media is compatible with this filling.
CAUTION:
Long-term exposure to UV rays may damage
unfilled polyethylene. If located outside an unfilled polyethyl-
ene pump should be protected from UV rays.
CAUTION:
Use caution not to overtighten air and liquid pipe
connections, or pump fasteners. Overtorque of fittings or
fasteners may damage the pump or cause leaking of
process fluid.
