Table of Contents
Advertisement
The chart below represents the pressure drop (Ft of Head) versus the water flow rate (GPM) for the P-K
STORM ST-2500 through ST-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 connecting piping, valves, strainers, couplings, flanges, etc.
30
25
20
15
10
5
0
0
20
40
ST-2500 through ST-4000 Boilers: Minimum & Maximum Flow Rates
Flow
Boiler
Condition
Operation
Maximum Flow High Fire
Minimum Flow
High Fire
Minimum Flow
Ignition
Minimum Flow
Low Fire
Revised: February 2, 2024
Released: February 2, 2024
P-K STORM ST-2500 - ST-4000
Pressure Drop vs. Flow
MAX FLOW ST-2500
242.5GPM @ 16.9ft
60
80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400
P-K STORM
ST-2500
242.5 GPM
69.3 GPM
(Flow
Switch
Setting)
Patterson-Kelley 2024
All Rights Reserved.
MAX FLOW ST-3000
@20°F ΔT
291GPM @ 24.3ft
@20°F ΔT
Flow Rate (GPM)
®
Flow Rate
ST-3000
ST-3500
291 GPM
339.5 GPM
83.1 GPM
97 GPM
(Flow
(Flow
Switch
Switch
Setting)
Setting)
®
P-K Storm
Gas Fired Boiler
Technical Service 1.877.728.5351
MAX FLOW ST-4000
@20°F ΔT
388GPM @ 25.6ft
MAX FLOW ST-3500
@20°F ΔT
339.5GPM @ 19.6ft
Approximate
ST-4000
388 GPM
20 °F
110.9 GPM
(Flow
60 °F
Switch
Setting)
2691000403 P-K Storm ST2500-ST8000
Installation and Owners Manual Rev G.docx
ΔT
Page 124
Advertisement
Table of Contents
