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Foundry Products --> Pumping
Systems --> RP Retrofit Pumping System
 Foundry
Products:
RP Retrofit
Pumping System
The
quality of your sand is only as good as the accuracy
of your Pumping System
- The
RP ELIMINATES Inaccurate, Inconsistent Pump
Delivery
- The
RP ELIMINATES Resin Bleed Back
- The
RP ELIMINATES the Need for Constant
Re-Calibration
- The
RP ELIMINATES High Parts Replacement Costs
Shipped
100% Tested, Assembled, and Ready to Install
INDEX
Palmer
Retrofit Pumping Systems (RP) are completely self
contained units that are designed to eliminate the
problems associated with old, worn, poorly designed
systems that cause such problems as inaccurate
delivery, inconsistent delivery, resin bleed back,
the need for constant re-calibration, and high
replacement parts cost. The Palmer RP Systems
are particularly helpful when used to replace
pumping systems designed around high RPM, low
displacement pumps.
The
entire RP System is housed in a NEMA enclosure,
which can be mounted on or near the existing mixer.
All electrical controls will be housed in a smaller
NEMA 12 enclosure, located within the larger
enclosure for added protection. All necessary
controls are accessible through a window on the door
of the large enclosure.
This
design allows easy access to all controls, switches,
pumps and drives, while protecting them from dust,
sand, and accidental damage.
The
system operates on a RUN / STOP basis with the pumps
running only while the mixer is making sand. This is
not common for systems of this type and is only
possible due to the extremely high torque output of
the pump motors used. The system requires only one
120-volt electrical connection and one ¼" 90
PSI compressed air line for operation.
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Electrical
The
electrical control system features two modes of
operation.
The
first is HAND, or manual mode, in which any or all
of the pumps can be activated by individual
two-position switches located on the door of the
enclosure. This mode is used primarily for
calibration purposes.
The
second mode is AUTOMATIC, in which all aspects of
the RP System operate based on a 120-volt trigger
signal from the electrical control system of the
existing mixer.
The
120-volt signal is the only electrical connection
required between the existing mixer and the RP.
This signal should be supplied from the output side
of the mixer's existing pump off delay timer.
Pump
speed is controlled by state-of-the-art Pulse Width
Modulated DC control boards, which convert 120-Volt
AC power to the 90 Volt DC used by the pump drive
motors. Push-button potentiometers, mounted on the
door of the electrical enclosure, control the output
voltage of the DC board and provide accurate,
precise adjustment of the pump drive motor.
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The
pump drive motors are ¼ HP DC voltage gear head
motors that are direct coupled to the pumps.
Air
actuated ball valves are plumbed in-line before the
pumps to eliminate chemical drain back during
inactive periods. The ball valves open immediately
when the pumps are activated and close immediately
when the pumps stop. This quick action maintains a
level of chemical at the mixing chamber to help
ensure good first and last sand.
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Need
all of the advantages of our standard Retrofit
Pumping System but don't want all of the
expense? Palmer has recently released its KIT
form of the RP. Fully functional, the KIT
includes all primary operating components without
the frills. The customer mounts the electrical
control enclosure, pump brackets, ball valves,
solenoids, and does the interconnecting
wiring. Using a KIT-RP, you can expect a
savings of over $1,500. Units come with
detailed connection instructions.
All
standard Palmer pumping system options are available
as listed below.
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| Control
System Options |
| Batch
Mixer Upgrade |
This
option takes the standard RP and adds a high
tolerance batch timer for run time. A
pulse signal from the existing batch mixer
control system initiates resin addition.
Addition of resin will automatically stop
when the run timer has expired. |
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Multiple
Resin Levels
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This
option provides additional sets of
potentiometers, which are calibrated to two
or more desired resin addition levels - such
as those used for facing and backup sand.
A dual-position switch, located in the
operator control panel, selects which set of
potentiometers control the DC motor speed.
Changes in selection of resin levels can be
made while the mixer is in operation.
The change in resin level at the mixing
chamber is immediate.
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Calibration
Timer
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This
option provides a digital timer, located in
the door of the primary electrical
enclosure. The timer is programmed for
the duration of the calibration sample
cycle. A three-position switch
determines which pump is to be calibrated.
The operator, after setting the timer and
selecting the pump, removes the chemical
nozzle from the mixing chamber and presses
the cycle start button located on the side
of the mixing chamber. The appropriate
pump and diverter valve actuate for exactly
the programmed amount of time.
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PLC
Control System
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Our
standard mixer control systems can easily be
replicated into a Allen Bradley Micrologic
1000 or 1500 or for a more advanced system,
the SLC 5XX Series of PLC’s are used.
Call us with your specific needs.
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Pump
Speed Displays
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Tachometer
displays located in the door of the primary
electrical enclosure monitor pump RPM and
convert the resulting signal into an LED
readout in either ounces or grams per
minute. They provide a constant
indication of pump speed and allow for a
calibration adjustment while the mixer is in
operation.
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PID
Feedback Control Using Microspeed or Dart
Controllers
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The
PID feedback system utilizes pump shaft RPM
to regulate the DC voltage applied to the
pump motors. There is a calibration
function which ties the pump rpm to actual
measured flow. The readout indicates
in whatever user units are desired (e.g. -
ounces, grams, milliliters). The
benefit to this option is that the pumps are
self-controlling.
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System Options
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