RP 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 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

General

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. Smart relay control systems controls the adjustable on/off delay pump times and includes an integrated timer system.

This design allows easy access to all controls, switches, pumps and drives, while protecting them from dust, sand, and accidental damage.

The RP system operates on either RUN / STOP or RECIRCULATION basis.

RUN / STOP
In 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.

Recirculation
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.

Pumps

All pump drive motor components are carefully selected, based on the following criteria:

• Output
• Compatibility with materials
• Viscosity range

Palmer stocks over 50 different styles and sizes of retrofit pumps including mechanical, seal, magnetic, etc.

All standard Palmer pumping system options are available as listed below.

Electrical

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.

The electrical control system features two modes of operation.

Hand or Automatic Modes
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.

In AUTOMATIC mode, all aspects of the RP System operate based on a trigger signal from the electrical control system of the existing mixer.

This 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.

Mechanical

The pump drive motors are (AC or DC) voltage gear head motors that are directly coupled to the pumps.

Run/Stop
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.

Recirculating
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 the supply.

This design, in conjunction with the precise smart relays or PLC, gives the system its accuracy and repeatability.