Series 1250 Pneumatic Chemical Injection Pump
Operating Manual
Page 16 of 19
On the 3/16” plunger model, the packing fits inside the sleeve rather than directly into the packing
gland. The same note applies to the 1/8” plunger model serial numbers AB056731 (B Model) and
AG057154 (GR Model) and earlier.
FIGURE 8
5.2.12 Grease the packing rings on their outside diameters lightly and install them, one ring at a time. It is important
to adhere to the ring order and orientation as shown in the diagram.
5.2.13 On the 3/16” plunger model, replace the internal snap ring to retain the sleeve.
5.2.14 Grease the packing nut threads and replace the nut loosely by hand.
5.2.15 Grease the plunger rod protruding from the pump motor.
5.2.16 Taking care to insert the plunger into the packing without damaging or bending it, replace the chemical
head onto the main body of the pump.
5.2.17 Grease the threads on the two head bolts, then insert and hand-tighten them.
5.2.18 Tighten the packing nut to the point where light pressure with one finger on the packing nut adjuster will
no longer move the packing nut.
5.2.19 Fully tighten down the head bolts. Failure to adhere to this procedure can lead to a misaligned head and
leaking packing.
5.2.20 Reattach all process lines to the chemical head, and open all isolation valves leading to the pump chemical
supply, discharge, and air/gas supply.
5.2.21 Adjust the packing nut per the directions in
Section 5.1
.
5.3 Lubrication
The CheckPoint Series 1250 motor was designed to run under "stone-dry" internal conditions in the motor end.
However, regular lubrication will maximize the life of the pump and thus add value to your investment. In addition
When replacing adjustable packing, always install the packing rings exactly as they are shipped.
Rearranging the order of the vee-rings in an adjustable packing set will reduce the life of the
elastomer ring in the packing set.
CP/MAN-PRD-015 REV. 15 EFF. DATE: 07/08/2022
