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Pump suction lift calculator

Catalog 28 ft is a sea-level manufacturer envelope. This sheet subtracts the missing atmosphere. It does not invent NPSHR.

Families: industrial pumps. Duty sizing: pump duty calculator.

Worksheet

Catalog Hs in, pad Hs out

Catalog lift left. Derated envelope right. Default 28 ft from Godwin US Product Catalog 07.2015 sea-level dry-prime. This is a derived derate, not a published Nairobi curve.

Catalog envelope

Units

Catalog Hs ft · sea-level dry-prime envelope

Requested lift ft · optional, on this job

Site

Suction stick · full height Hatm sea

Send to Proxico

Result · live

Live

— ft

ft · catalog at sea level

Requested lift exceeds the derated envelope.

Hs on this pad: —
Catalog sea level: —
Hatm site: —
Cut from sea: —

Judgement

28 ft is a manufacturer limit in feet (Godwin US Product Catalog 07.2015, sea-level dry-prime envelope). This page is a derived derate, not a published Nairobi curve. NPSHR is not invented here.

Enquiry · from this pad

Godwin catalog 07.2015 · ISO 2533

Site suction lift: Hs_site = Hs_catalog − (Hatm_sea − Hatm_site). Atmosphere missing at elevation is subtracted from the sea-level envelope.
Source: Default 28 ft from Godwin US Product Catalog 07.2015 sea-level dry-prime. Derived derate — not a published Nairobi curve. NPSHR is not invented.

Confirm pad RL and manufacturer envelope before a purchase order.