Retrofit Pumping Systems
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
- The RP ELIMINATES the
Need for Constant Re-Calibration
- The RP ELIMINATES High
Parts Replacement Costs
100% Tested, Assembled,
and Ready to Install
Palmer No-Bake Equipment Line
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.
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. Smart relay control systems controls the adjustable on/off
delay pump times and includes an integrated timer system.
allows easy access to all controls, switches, pumps and drives, while
protecting them from dust, sand, and accidental damage.
system operates on either RUN / STOP or RECIRCULATION basis.
RUN / STOP
the pumps come on when sand is being made and stops running when sand is no
longer needed. 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.
Recirculating design - pumps run
continuously and have a 3-way diverter valve. Diverter valves direct resin
to the mixer as needed. When not making sand, the resin flow is diverted.
Recirculating ensures immediate delivery of the resin to the mixing chamber.
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All functions are controlled by
an integrated smart relay. This smart relay controls the adjustable on/off
delay timers for up to three pumps and one powder feeder. The smart relay
also includes a calibration timer system.
All electrical is housed in a
NEMA enclosure and use NEMA rated switches, etc.
control system features two modes of operation.
In HAND (or manual) mode, 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 and maintenance purposes. An
auto-calibration timer option is available.
mode, all aspects of the RP System operate based on a trigger signal from
the electrical control system of the existing mixer.
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. ON and OFF delay timers can be
incorporated into the RP.
Pump speed is accurately
controlled by either a solid state dependable DC 0-90 VDC speed controller
or high quality VFD. Calibration and outputs are quick and easy to adjust.
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The pump drive
motors are (AC or DC) voltage gear head motors that are directly coupled to
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.
In a recirculating design, the pumps run constantly. The output goes to air
actuated 3-way valves that either direct the flow to the mixer or back to
This design, in conjunction with
the precise smart relays or PLC, gives the system its accuracy and
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Control System Options
PLC Control System
Our standard mixer
control systems can easily be replicated into an 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.
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.
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.
Pump Speed 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
Additional controls for mixer drive
motors, conveyor belts, slide gates, run timers, RFID, Ethernet,
can be included. Call for pricing.
Exmann Speed Controllers
E-8200 Digital PC motor drive speed