Wilden H200 Advanced Metal Series, Operation

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WILDEN PUMP & ENGINEERING, LLC WIL-11114-E-02
S U G G E S T E D O P E R A T I O N & M A I N T E N A N C E
OPERATION: Pump discharge rate can be controlled by
limiting the volume and/or pressure of the air supply
to the pump . An air regulator is used to regulate air
pressure . A needle valve is used to regulate volume .
Pump discharge rate can also be controlled by
throttling the pump discharge by partially closing a
valve in the discharge line of the pump . This action
increases friction loss which reduces flow rate . (See
Section 5 .) This is useful when the need exists to
control the pump from a remote location . When the
pump discharge pressure equals or exceeds the air
supply pressure, the pump will stop; no bypass or
pressure relief valve is needed, and pump damage
will not occur . The pump has reached a “deadhead”
situation and can be restarted by reducing the fluid
discharge pressure or increasing the air inlet pressure .
The Wilden H220 pump runs solely on compressed air
and does not generate heat, therefore your process
fluid temperature will not be affected . MAINTENANCE AND INSPECTIONS: Since each
application is unique, maintenance schedules may
be different for every pump . Frequency of use, line
pressure, viscosity and abrasiveness of process fluid
all affect the parts life of a Wilden pump . Periodic
inspections have been found to offer the best
means for preventing unscheduled pump downtime .
Personnel familiar with the pump’s construction and
service should be informed of any abnormalities that
are detected during operation .
RECORDS: When service is required, a record should
be made of all necessary repairs and replacements .
Over a period of time, such records can become a
valuable tool for predicting and preventing future
maintenance problems and unscheduled downtime . In
addition, accurate records make it possible to identify
pumps that are poorly suited to their applications .
T R O U B L E S H O O T I N G
Pump will not run or runs slowly.
1 .
With the use of the flow curve located in the
performance section of this EOM, verify air pressure
and volume required for your application . If inlet air
pressure is too low, the H220 pump will not operate .
2 . Check air inlet filter for debris (see SUGGESTED
INSTALLATION) .
3 . Disassemble pump and check for obstructions in
the air passageways or objects that would obstruct
the movement of internal parts .
4 . Check for sticking ball check valves . If material being
pumped is not compatible with pump elastomers,
swelling may occur . Replace ball check valves and
seals with proper elastomers . Also, as the check
valve balls wear out, they become smaller and can
become stuck in the seats . In this case, replace balls
and seats .
5 . Inspect pressure relief valve for damage . Replace if
necessary with genuine Wilden parts .
6 . Inspect the center block seals for damage . Replace if
necessary .
Pump runs but little or no product flows.
1 .
Check for pump cavitation; slow pump speed
down to allow thick material to flow into liquid
chambers .
2 . Verify that vacuum required to lift liquid is not
greater than the vapor pressure of the material
being pumped (cavitation) .
3 . Check for sticking ball check valves . If material being
pumped is not compatible with pump elastomers,
swelling may occur . Replace ball check valves and
seats with proper elastomers . Also, as the check
valve balls wear out, they become smaller and can
become stuck in the seats . In this case, replace balls
and seats .
4 . Check tightness of inlet and discharge connections .
5 . Check tightness of all fasteners .
Pump air valve freezes.
1 .
Check for excessive moisture in compressed
air . Either install a dryer or hot air generator for
compressed air . Alternatively, a coalescing filter
may be used to remove the water from the
compressed air in some applications .
Air bubbles in pump discharge.
1 . Check for ruptured diaphragm .
2 . Check tightness of outer pistons (refer to Section 7) .
3 .
Check tightness of fasteners and integrity of
O-rings and seals, especially at intake manifold .
4 . Ensure pipe connections are airtight .
Product comes out air exhaust.
1 . Check for diaphragm rupture .
2 . Check tightness of outer pistons to shaft .
3 . Check tightness of fasteners that connect the inner
piston to the outer piston .