Duty path

Valve Chem Pump Atm Diesel Suction

Duty · Q — · —

Pump duty calculator

Size an industrial pump from the duty on a Kenyan plant — transfer, metering, slurry or viscous.

Enquiry document

Specification request

Living sheet · rewritten from calculator

Auto-composed from the duty above

These nine fields are not a blank form. They rewrite as you size. Edit a line if you need to; otherwise send it as composed.

1 Job
2 Hydraulic duty
3 Process medium
4 Family shortlist
5 Hydraulics / BEP / off-duty
6 Connections / seal
7 Materials
8 Certification / standards
9 Maintenance

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Estimate for enquiry, not a certified OEM sizing. It does not name a steel grade and it is not a pump curve. Confirm with manufacturer software and the duty on site before a purchase order. Related article: small equipment failures (duty-point cost).

Left pane stays with the tool · Duty is the join key across all six calculators.

Valve Chem Pump Atm Diesel Suction

Line conditions

Path

Units

Job

Fluid / medium

Flow Q m³/h

Flow must be greater than zero.

Head H m

Head must be greater than zero — or enter suction and discharge pressure in Advanced.

Temperature °C

SG (water = 1) Optional. Default 1.

Viscosity cP · optional

Solids % by volume · optional

Efficiency η Assumption — centrifugal default 0.70. Editable.

Hours / year Used if you switch to the energy path.

Advanced · head from pressure, NPSHa

If you have suction and discharge pressure instead of head, enter both — head is converted. NPSHa is a system number. NPSHr is not invented; it lives on the manufacturer’s curve.

Suction P_s bar g

Discharge P_d bar g

Suction static H_s m · positive flood, negative lift

Vapour pressure P_v bar a

Suction line losses m

Tank pressure (optional) bar g · blank = atmospheric

Site elevation (optional) m · blank = sea level (1.013 bar a). JKIA 1,624 m ≈ 0.83 bar a.

Size from the line conditions, not the nameplate. Last-project duty is a reasonable starting point — the sheet rewrites it against current conditions. Enquiry is a re-spec, not a like-for-like replacement. Assessment frame: ISO 14414.

Nameplate or measured kW Current draw is assumed to stay near this figure when the pump is throttled — typical of an oversized centrifugal running against a valve.

Rated flow m³/h

Actual flow m³/h · or % of rated below

Actual flow entered as

Hours / year Default 8000. Overwrite for the real calendar.

Tariff KES/kWh. 25 is a 2026 industrial-order-of-magnitude example — overwrite it. Not an EPRA published tariff.

Hydraulics, materials and seals selected for the fluid, not just the flow rate. This path writes questions into the enquiry — it does not name a certified steel grade.

Fluid family

Concentration (optional)

Temperature °C · same duty temperature; edits feed the sheet

Solids / abrasives

Duty hygiene

Example is illustrative only — not a named plant.

Result · live

Enter valid line conditions. Q > 0 and a head (or suction and discharge pressure).

— kW

Family —

Job: —
Approx. motor kW: —
η (assumption): —
Standards: —

No BEP from this sheet — a BEP is a curve figure we do not have.

— KES / yr

USD — · 2026 conditions, ~130 KES/USD

This pump, these hours: —
Article band (context): USD 4–23k / KES 0.5–3M
Shaft power at actual flow (if H known): —
Q actual / rated: —

Family hint

Standards —

First-pass filter for the enquiry — the language already on the pumps page. Confirm with manufacturer compatibility data. Grade not named until the medium data sheet is attached.

Interconnect — Wire navigates the six tools; Split Desk keeps the enquiry visible while you size. Shared Duty object (proxico.duty.v1) carries Q, head/ΔP, T, medium, elevation.

Pump duty calculator

Specification request

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