Series FXS Solar Injection System
Operating Manual
Page 6 of 35
1.1.2 Referring to Figure 1, ensure that all necessary components are present in your injection system
and are in good working order. CheckPoint recommends all components shown above to maximize
productivity and life of the pump in typical field or plant use. CheckPoint is available to answer all of your
process questions or to help design and build a package system utilizing components appropriate for your
application.
NOTE: In Figure 1, the secondary chemical filter is optional under certain conditions but is highly
recommended.
1.1.3 CheckPoint requires horizontal mounting of Solar FXS model pumps. Failure to do so will result in
oil leakage from the breather vent. The Solar FXS comes standard with a floor stand to ensure proper
orientation.
1.1.4 Accurately setting the flow rate of the pump can only be accomplished with either a suction-side
calibration gauge or a discharge flow meter. Many variables, including temperature, chemical viscosity, and
other environmental factors, preclude the use of tables, graphs, or formulas to determine the rate of
injection. Additionally, without a calibration gauge or flow meter, it cannot be determined if the pump is
primed and functioning normally. For instructions on the proper use of a suction-side calibration gauge,
please refer to Section 2.3.1, Setting Pump Speed Using a Calibration Gauge for more information. The
proper placement of a calibration gauge is shown in Figure 1, item 5. CheckPoint offers a complete range
of accurate and durable calibration gauges and discharge-side flow meters suitable for Solar FXS pump
service.
NOTE: It is necessary to attach a vent tube to the top of all calibration gauges, chemical tanks, and
tank level gauges. The height of the top of each vent tube should always be greater than the
highest possible liquid level in the system, and the tube should have features to prevent water
entry, such as a 180 degree bend.
1.1.5 The Solar FXS does not require flooded suction or positive chemical pressure to prime and can
therefore be mounted above the chemical container. This feature depends upon proper adherence to all
points made in Section 1.1.6. Solar FXS pumps with plunger sizes of 1/8” and 3/16”, and applications where
the injection chemical is prone to gas off, will benefit by having flooded suctions.
1.1.6 ALL COMPONENTS AND PIPEWORK BETWEEN THE CHEMICAL TANK AND THE SUCTION CHECK
VALVE OF THE PUMP MUST BE 100% BUBBLE-TIGHT AND FULLY COMPATIBLE WITH THE CHEMICAL AND
WITH EACH OTHER. FAILURE TO ADHERE STRICTLY TO THIS DIRECTIVE WILL LEAD TO LOSS OF PRIME AND
DAMAGE TO THE WETTED SEALS AND PLUNGER. SPECIFICALLY:
1.1.6.1 Any fitting or screw-on joint without Teflon™ tape or other acceptable sealant may allow air at
atmospheric pressure to enter the suction tubing, even if no chemical leakage is visible.
1.1.6.2 Dissimilar metals in the suction side of the injection system may react with each other, creating gas
bubbles that will be carried into the pump head. All suction components, tubing, pipe, fittings, and valves
must be composed of similar or compatible materials. Please note that CheckPoint offers wetted parts
comprised of 316 SS, Hastelloy C, PVC, Titanium and Alloy 20.
CP/MAN-PRD-008 REV. 02 EFF. DATE: 07/06/2022
