PSG Dover Accu-Flo, Engineering, Operation & Maintenance

Page: 4 / 28

WIL-10070-E-03
Wilden
®
4
Precautions - Read First!
TEMPERATURE LIMITS:
Polypropylene 0°C to 79°C 32°F to 175°F
PVDF –12°C to 107°C 10°F to 225°F
Neoprene –17.8°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
FKM –40°C to 176.7°C –40°F to 350°F
Wil-Flex™ –40°C to 107.2°C –40°F to 225°F
Polyurethane 12.2°C to 65.6°C 10°F to 150°F
Saniflex™ –28.9°C to 104.4°C –20°F to 220°F
PTFE 4.4°C to 104.4°C 40°F to 220°F
Polypropylene 0°C to 79°C 32°F to 175°F
PVDF –12°C to 107°C 10°F to 225°F
NOTE: Not all materials are available for all models. See "Wilden Pump Designation
System on page 5 for material options for your pump.
CAUTION: When choosing pump materials, be sure to check
the temperature limits for all wetted components. Example:
FKM
®
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 significantly 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.
WARNING: Prevention of static sparking — If static sparking
occurs, fire or explosion could result. Pump, valves, and
containers must be properly grounded when handling
flammable fluids and whenever discharge of static electricity
is a hazard.
CAUTION: Do not exceed 8.6 bar (125 psig) air
supply pressure.
CAUTION: Plastic series pumps are made of virgin plastic and
are not UV stabilized. Direct sunlight for prolonged periods can
cause deterioration of plastics.
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 fluid to flow into a suitable container.
CAUTION: Blow out air line for 10 to 20 seconds before
attaching to pump to make sure all pipe line debris is
clear. Use an in-line air filter. A 5µ (micron) air filter
is recommended.
NOTE: Tighten clamp bands and retainers prior to
installation. Fittings may loosen during transportation.
NOTE: When installing PTFE diaphragms, it is important
to tighten outer pistons simultaneously (turning in opposite
directions) to ensure tight fit.
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: Verify the chemical compatibility of the process and
cleaning fluid to the pump’s component materials in the
Chemical Resistance Guide (see RBG E4).
CAUTION: Only explosion proof (NEMA 7) solenoid valves
should be used in areas where explosion proof equipment
is required
CAUTION: Do not lubricate lube-free pumps.
CAUTION: The A2 pump is not submersible.
NOTE: When reinstalling the outer pistons, apply two (2)
drops of Loctite® 246 to the shaft internal threads before the
diaphragm assembly.
Section 1