Patterson-Kelley MACH C-1500H Installation & Owner's Manual page 129

Hydronics/Water Flow (C-2500, C-3000 & C-4000)
The chart below represents the pressure drop (Ft of Head) versus the water flow rate (GPM) for the
MACH C-2500, C-3000 & C-4000. This information is useful to help size an appropriate circulation
pump. Keep in mind this pressure drop represents the boiler only, additional consideration is needed
for any connected piping, valves, strainers, couplings, flanges, etc.
The table below summarizes the minimum and maximum flow restrictions for the MACH C-2500/3000:
Flow Condition
Maximum Flow
Minimum Flow
Minimum Flow
Minimum Flow
The table below summarizes the minimum and maximum flow restrictions for the MACH C-4000:
Flow Condition
Maximum Flow
Minimum Flow
Minimum Flow
Minimum Flow
Revised: January 3, 2020
Released: January 3, 2020
Boiler Operation
High Fire
High Fire
Ignition
Low Fire
Boiler Operation
High Fire
Low Fire
Ignition
Low Fire
 Patterson-Kelley 2020
All Rights Reserved.
Technical Service 1.877.728.5351
C-2500 C-3000
Flow Rate Flow Rate
238 GPM 285 GPM
120 GPM 143 GPM
60 GPM 72 GPM
47 GPM 57 GPM
Flow Rate
380 GPM
190 GPM
95 GPM
76 GPM
1004905981 P-K MACH C1500H-C4000 Installation and
®
P-K MACH Gas Fired Boiler
Approximate ΔT
20°F
40°F
40°F
20°F
Approximate ΔT
20°F
40°F
40°F
20°F
Owners Manual (Rev F Jan-2020).docx
Page 124