Series 1250 Pneumatic Chemical Injection Pump
Operating Manual
Page 5 of 19
CAUTION: When using a pressure relief valve, chemical tank or vessel MUST BE properly vented to
atmosphere to avoid the possibility of over-pressurizing the tank if the pressure relief valve
opens.
Removing foreign debris from suction lines and chemical containers will substantially extend the life
of the packing and other components of the pump. Even a new chemical tank can contain debris
that can be carried into the pump and damage it.
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.
the cylinder and slow or stop the piston from moving. To maximize stability and accessibility, use the mounting
bracket specifically designed for the series pump.
1.1.8 Always check to ensure that all process block valves (labeled as nos. 2, 3 & 7 in Figure 1) are closed prior to
disconnecting or re-installing any chemical injection pump. There should always be a block valve placed between a
properly installed pump and the process flow, the gas supply, the chemical supply, and, in the case of Gas Recovery
models, the gas recovery outlet. Conversely, while the pump is running, all such block valves should always be open.
1.1.9 All process lines leading to and from the pump should be at least 3/8 inch diameter to ensure sufficient flow
rates of chemical and minimize pressure drop through the lines. For multiple pump installations and for extremely
viscous chemicals, additional allowances are needed. Contact CheckPoint or your authorized CheckPoint distributor
for design assistance.
1.1.10 To avoid over-pressuring chemical discharge lines, CheckPoint recommends placing a pressure relief valve
between the discharge check valve 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.
1.1.11 Pulsation dampeners are sometimes specified in systems utilizing Series 1250 pumps. CheckPoint does not
recommend their use because the low flow rates of all Series 1250 pumps do not generate harmful pulsation in
most systems.
1.2 Connecting The Chemical Supply
1.2.1 Clean suction lines and check chemical containers to ensure that they are free of all foreign matter, sand,
sludge, or chemical buildup.
CP/MAN-PRD-015 REV. 15 EFF. DATE: 07/08/2022
