Series GX15 Pneumatic Chemical Injection Pump
Operating Manual
CP-MAN-PRD-GX15
REV06
EFF. DATE 07/23/2019
Page 10 of 12
4.
PUMP MAINTENANCE
The CheckPoint Series GX15 is designed to provide trouble-free operation for many years with little adjustment,
lubrication, or other routine maintenance. However, like any other device, proper maintenance can extend the life
of the product. This can include periodic cleaning of the gas and chemical inlets, and lubrication.
Plunger Seal Replacement
Follow the steps below to change the seal.
NOTE:
The Series GX15 pump uses a non adjustable plunger seal. Once installed it requires no maintenance.
4.1.1
Close the chemical, process and supply gas block valves.
4.1.2
Disconnect the chemical supply from the pump suction check valve, and disconnect the process line from the
pump discharge check.
4.1.3
Remove the chemical head by removing the four screws through the head flange then separate the head
from the main body.
4.1.4
Remove the seal from the head.
4.1.5
Examine the new seal for defects before installation.
NOTE:
The grease should be a premium quality multi-purpose, lithium-base NLGI No 2 grease
recommended for general industrial applications which meets or exceeds the requirements of DIN
51825: (2004-06) 2K-30. Avoid products containing Xylene.
4.1.6
Lightly coat the new seal elastomers
’
outer diameter with grease. Install seal in head, elastomer end first.
4.1.7
Lightly grease the plunger prior to reinstalling the head.
4.1.8
Carefully insert the plunger into the seal as the head is reinstalled.
4.1.9
Install four head bolts and torque to 18 in lb.
4.2
Lubrication
The CheckPoint Series GX15 motor was designed to run under completely dry internal conditions. However, regular
lubrication will maximize the life of the pump. Lubrication minimizes motor seal friction and flushes out foreign
debris reducing internal wear and tear.
4.2.1
Periodic Lubrication
To lubricate the pump periodically, block off and then disconnect the air/gas supply
line by unscrewing the fitting at the pump air/gas inlet. Introduce approximately 1cc of lubricant into the air/gas
inlet. Reconnect the air/gas supply line and reintroduce gas pressure. Lubricant will become evenly distributed
throughout the motor end of the pump within a few cycles.
4.2.2
Continuous Lubrication
Lubricator bottles can be placed anywhere in the gas su
pply line prior to the pump’s
air/gas inlet. Set the lubricator rate as low as possible, one to two drops per minute, unless cold conditions dictate
more in order to prevent freezing of the gas supply. CheckPoint offers both a small and a large in-line lubricator;
call CheckPoint or your authorized CheckPoint distributor for details.
4.2.3
Recommended Lubrication Type
A light hydraulic oil bearing the designation ISO 3448 viscosity no. 20-32
should be used. If atmospheric or other supply air/gas conditions present exhaust freezing issues, a similar type
lubricant with an antifreeze component such as glycol may be used.
