Dover PSG Wilden P1 Скачать руководство пользователя страница 11

Страница: 11 / 32

WIL-10140-E-08

Wilden

Suggested Installation, Operation, Maintenance and Troubleshooting

The Pro-Flo

model P1 has a 13 mm (1/2") inlet and 13 mm (1/2") outlet

and is designed for flows to 56.8 lpm (15 gpm). The P1 Plastic pump is
manufactured with wetted parts of pure, unpigmented PVDF, PTFE PFA
or polypropylene. The P1 Plastic is constructed with a polypropylene
center section. A variety of diaphragms and o-rings are available to

satisfy temperature, chemical compatibility, abrasion and flex concerns.

The suction pipe size should be at least 13 mm (1/2") diameter or larger
if highly viscous material is being pumped. The suction hose must be
non-collapsible, reinforced type as the P1 is capable of pulling a high
vacuum. Discharge piping should be at least 13 mm (1/2"); larger
diameter can be used to reduce friction losses. It is critical that all fittings

and connections are airtight or a reduction or loss of pump suction
capability will result.

CAUTION:

All fittings and connections must be airtight.

Otherwise, pump suction capability will be reduced or lost.

Months of careful planning, study and selection efforts can result in
unsatisfactory pump performance if installation details are left to
chance. You can avoid premature failure and long-term dissatisfaction
by exercising reasonable care throughout the installation process

Location

Noise, safety and other logistical factors usually dictate where
equipment will be situated on the production floor. Multiple installations
with conflicting requirements can result in congestion of utility areas,
leaving few choices for additional pumps.
Within the framework of these and other existing conditions, every
pump should be located in such a way that several key factors are
balanced against each other to maximum advantage.

•

Access:

First of all, the location should be accessible. If it’s easy

to reach the pump, maintenance personnel will have an easier
time carrying out routine inspections and adjustments. Should
major repairs become necessary, ease of access can play a key
role in speeding the repair process and reducing total downtime.

•

Air Supply:

Every pump location should have an air line large

enough to supply the volume of air necessary to achieve the
desired pumping rate. Use air pressure up to a maximum of 8.6
bar (125 psig) depending on pumping requirements.
For best results, the pumps s

hould use a 5μ (micron) air filter,

needle valve and regulator. The use of an air filter before the
pump will ensure that the majority of any pipeline contaminants
will be eliminated.

•

Solenoid Operation:

When operation is controlled by a solenoid

valve in the air line, three-way valves should be used. This valve
allows trapped air between the valve and the pump to bleed off
which improves pump performance. Pumping volume can be

estimated by counting the number of strokes per minute and then
multiplying the figure by the displacement per stroke.

• Muffler:

Sound levels are reduced below OSHA specifications using

the standard Wilden muffler. Other mufflers can be used to further
reduce sound levels, but they usually reduce pump performance.

•

Elevation:

Selecting a site that is well within the pump’s

dynamic-lift capability will assure that loss-of-prime issues will
be eliminated. In addition, pump efficiency can be adversely
affected if proper attention is not given to site location.

• Piping:

Final determination of the pump site should not be

made until the piping challenges of each possible location have

been evaluated. The impact of current and future installations
should be considered ahead of time to make sure that
inadvertent restrictions are not created for any remaining sites.

The best choice possible will be a site involving the shortest and
straightest hook-up of suction and discharge piping. Unnecessary
elbows, bends and fittings should be avoided. Pipe sizes should be
selected to keep friction losses within practical limits. All piping should
be supported independently of the pump. In addition, the piping

should be aligned to avoid placing stress on the pump fittings.
Flexible hose can be installed to aid in absorbing the forces created
by the natural reciprocating action of the pump. If the pump is to be
bolted down to a solid location, a mounting pad placed between the
pump and the foundation will assist in minimizing pump vibration.
Flexible connections between the pump and rigid piping will also
assist in minimizing pump vibration. If quick-closing valves are
installed at any point in the discharge system, or if pulsation within a

system becomes a problem, a surge suppressor (SD Equalizer

)

should be installed to protect the pump, piping and gauges from
surges and water hammer.

NOTE:

Materials of construction and elastomer material have

an effect on suction-lift parameters. Please refer to the
performance section for specifics.

When pumps are installed in applications involving flooded suction or
suction-head pressures, a gate valve should be installed in the
suction line to permit closing of the line for pump service.
For P1 Plastic models, a non-raised surfaced-flange adapter should

be utilized when mating to the pump’s inlet and

discharge manifolds

for proper sealing.
The P1 can be installed in submersible applications only when both
the wetted and non-wetted portions are compatible with the material
being pumped. If the pump is to be used in a submersible application,

a hose shou

ld be attached to the pump’s air and pilot spool exhaust

ports and piped above the liquid level. The exhaust area for the pilot
spool is designed to be tapped for a 1/8" NPT fitting. Pumps in
service with a positive suction head are most efficient when inlet
pressure is limited to 0.5

–

0.7 bar (7

–

10 psig). Premature diaphragm

failure may occur if positive suction is 0.7 bar (10 psig) and higher.
If the pump is to be used in a self-priming application, be sure that all

connections are airtight and that the suction lift is within the model’s

ability. Note: Materials of construction and elastomer material have
an effect on suction lift parameters. Please consult Wilden distributors
for specifics.
The model P1 plastic will pass 1.6 mm (1/16") solids. Whenever the
possibility exists that larger solid objects may be sucked into the pump.

CAUTION:

Do not exceed 8.6 bar (125 psig) air

supply pressure.

Section 6