Series GX15 Pneumatic Chemical Injection Pump
Operating Manual
CP-MAN-PRD-GX15
REV06
EFF. DATE 07/23/2019
Page 5 of 12
1.1.9
TO AVOID OVER-PRESSURING CHEMICAL DISCHARGE LINES, CHECKPOINT REQUIRES PLACING A PROPERLY
TESTED AND CALIBRATED PRESSURE RELIEF VALVE BETWEEN THE DISCHARGE PORT OF THE PUMP AND THE
PROCESS FLOW. THE PRESSURE RELIEF VALVE DISCHARGE CAN BE RUN TO A TEE UPSTREAM OF THE
PUMP’S
CHEMICAL SUCTION CHECK VALVE OR RE-ROUTED TO TANK. FAILING TO USE A PRV IS EXTREMELY DANGEROUS.
EXCESSIVE PRESSURE MAY LEAD TO CATASTROPHIC FAILURE OF PROCESS EQUIPMENT OR BODILY HARM.
CHECKPOINT IS NOT RESPONSIBLE FOR ANY DAMAGE CAUSED BY OVER-PRESSURIZED CHEMICAL. CheckPoint
offers a range of pressure relief valves suitable for use with the GX15 pump..
1.1.10
Depending on a variety of factors, pulsation dampers or suction accumulators may be required in your
installation. Due to low flows associated with the GX15 pump pulsation dampers are normally not required. Consult
with CheckPoint if you have any concerns about pulsation or NPSHa
CAUTION:
When using a pressure relief valve, the chemical tank MUST BE properly vented to atmosphere.
Venting helps avoid the possibility of tank over-pressurization if the pressure relief valve
actuates.
1.2
Connecting the Chemical Supply
1.2.1
Clean suction lines and check chemical containers to ensure they are free of foreign matter, sand, sludge, or
chemical buildup.
NOTE:
Even new chemical tanks can contain debris which may cause system damage. Removing foreign
debris from suction lines and chemical containers will substantially extend the life of the plunger seal
and other pump components.
NOTE:
CheckPoint recommends using filtration to ensure a maximum particulate size of 140 microns. Multiple
stages of filtration should be considered, depending upon the initial cleanliness level of the fluid media
being pumped, to prevent cavitation and an increase in maintenance.
NOTE:
If premature scoring of the pump plunger or early packing failure is observed during operation, a likely
cause is abrasive particles carried into the pump through the suction plumbing. Use of a pre-suction
in-line chemical filter such as the CheckPoint Series FSTS and/or a ceramic or Hastelloy
TM
plunger is
recommended if symptoms continue. Call CheckPoint for appropriate filter element sizing criteria.
CAUTION:
Substantial scoring of the plunger can lead to severe leakage of chemical into the surrounding
environment.
1.2.2
Connect the chemical suction line to the suction check valve on the pump head. The suction check valve is a
1/4” NPT male thread
. Do not over-tighten NPT connections.
NOTE:
To prevent leakage apply Teflon™ tape, or equivalent thread sealant to the check valve threads prior to
attachment.
NOTE:
To operate properly, the check valves MUST remain directly attached to the chemical head. Never re-
locate the suction check valve away from the chemical head .
1.2.3
Connect the discharge line to the discharge check valve (
1/4” NPT male thread
).
