Condensate Return Pump Sizing
Flow and head for a condensate receiver pump from boiler load, with the 3× intermittent factor.
The 3× factor handles slug-wise receiver filling. Hot condensate is an NPSH nightmare — receiver vented, pump low, suction short.
Formula
Condensate Return Pump Sizing is a free condensate pump sizing for pump engineers, plumbers and plant designers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Condensate Return Pump Sizing
Flow and head for a condensate receiver pump from boiler load, with the 3× intermittent factor. The calculation implements Q = 3 × condensate rate; H = lift + P_back/ρg (ρ ≈ 958 hot) (Spirax Sarco — condensate recovery design). The 3× factor handles slug-wise receiver filling. Hot condensate is an NPSH nightmare — receiver vented, pump low, suction short.
How to use Condensate Return Pump Sizing
- 1Enter Boiler capacity in kg/h steam.
- 2Enter Condensate returned in %.
- 3Enter Lift to boiler/deaerator in m.
- 4Enter Return-line back pressure in kPa.
- 5Read Pump flow (3× factor), Required head instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Condensate Return Pump Sizing?
- ✓Implements the standard formula — Q = 3 × condensate rate; H = lift + P_back/ρg (ρ ≈ 958 hot)
- ✓Reference cited on-page: Spirax Sarco — condensate recovery design
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Condensate Return Pump Sizing use?+
It computes Q = 3 × condensate rate; H = lift + P_back/ρg (ρ ≈ 958 hot), per Spirax Sarco — condensate recovery design. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
The 3× factor handles slug-wise receiver filling. Hot condensate is an NPSH nightmare — receiver vented, pump low, suction short.
Can I use this for pump selection?+
Use it to establish the duty (flow, head, NPSH, power) and then pick a pump whose curve passes through that point near best efficiency. The tool gives you the engineering numbers a supplier will ask for.
Is the Condensate Return Pump Sizing free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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