Series 1250 Pneumatic Chemical Injection Pump
Operating Manual
Page 13 of 19
Gas supply pressure value must be absolute pressure, not gauge pressure (Absolute pressure =
gauge pr atmospheric pressure). For reference, the Earth's atmospheric pressure at sea level
is approximately 1 atm or 14.696 psi or 1.0133 bar.
This is a theoretical consumption rate that will vary depending on gas density and other actual field
conditions. Air/Gas consumption can be minimized by using the minimum supply pressure required
to achieve the target application. Please contact CheckPoint for assistance estimating optimal supply
pressure and associated consumption rate for a particular application.
4. AIR/GAS CONSUMPTION
If emissions are a concern, call CheckPoint for details on gas recovery options.
Use the following equation along with the appropriate gas consumption factor from Figure 7 to calculate air/gas
consumption.
Gas Consumption [SCFM] @ 68F = Chemical Flow Rate [GPH] * Gas Supply Pressure [PSIA] * English Gas
Consumption Factor
Gas Consumption [Nm3/Hr] @ 0C = Chemical Flow Rate [LPH] * Gas Supply Pressure [BARA] * SI Gas
Consumption Factor
FIGURE 7: GAS CONSUMPTION FACTORS
GAS CONSUMPTION FACTOR
PUMP
SERIES
PLUNGER
DIAMETER
[IN]
ENGLISH
SCFM
@ 68F
SI METRIC
NM3/HR
@ 0C
1250
1/8
0.1273
11.2538
3/16
0.0566
5.0017
1/4
0.0318
2.8134
3/8
0.0141
1.2504
1/2
0.0080
0.7034
5. PUMP MAINTENANCE
The CheckPoint Series 1250 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 packing adjustment, periodic cleaning of the gas and chemical inlets, and
lubrication.
CP/MAN-PRD-015 REV. 15 EFF. DATE: 07/08/2022
