TL;DR
For NOV 9-P-100, keep volume per stroke separate from flow per minute. In the source's 6-inch liner column, 3.396 gal (12.857 liters) per stroke is paired with 509 GPM (1929 LPM) at the marked 150 SPM row.
- Save the liner column, speed row and units together.
- Use multiplication only as a labelled editorial check; retain the printed chart values.
- Keep the source's efficiency assumptions and unresolved equipment applicability with the record.
This is a reading example from NOV booklet 25-101131, PDF page 29, not measured delivery, parts fitment or an approved operating point.
Scope: which document and model does this cover?
This guide uses the separate 9-P-100 Performance Chart on PDF page 29. The adjacent 10-P-130 table is a different model. Confirm the heading before recording a number; a shared page does not establish shared performance.
The current website's 9-P-100 catalog has unresolved differences in specification and extra liner-column provenance. This article uses the cited source examples and does not reconcile those catalog claims. Use the pump directory for navigation. For an installed pump, obtain its identity, configuration and applicable approved documents before using any record for a decision.
What is the difference between volume per stroke and GPM?
Volume per stroke describes an amount attached to each source-defined stroke; GPM describes an amount per minute. Do not paste a value from one field into the other or drop its time basis.
The selected 6-inch column records two separate source fields:
- Volume field: 3.396 gal (12.857 liters) per stroke.
- Flow field at 150 SPM: 509 GPM (1929 LPM).
These are printed examples from NOV page 29. A traceable record should name the field as well as the number. Keep its original units beside any translation. A plain entry such as “3.396 flow” leaves the recipient unable to identify which field was copied.
How can multiplication check the selected row?
Multiply the selected volume-per-stroke value by the selected speed as an editorial consistency check. For this example, 3.396 × 150 = 509.4 and 12.857 × 150 = 1928.55. These are our arithmetic results, expressed respectively in gallons per minute and liters per minute; the printed source remains 509 GPM (1929 LPM).
The calculation helps catch a wrong column or time basis. It does not replace the OEM's printed entries, establish an exact reconstruction of every rounded row or predict measured delivery. Keep the calculation in a separate field labelled “editorial check”, beside the untouched source extract. Do not introduce an additional cylinder multiplier without a documented definition of the source field.
The chart footnote states 90% mechanical efficiency and 100% volumetric efficiency. NOV page 29. Preserve these as chart assumptions, not measured efficiency of the installed pump. This reading check supplies no extra efficiency correction or motor sizing method.
Does the liner footnote supply extra performance columns?
No. The 9-P-100 footnote mentions 6¾-inch and 6½-inch sizes available in regular liners, while the chart's displayed columns run from 6¼-inch to 4½-inch. That note does not print a flow row or volume value for either extra size. NOV page 29.
Record the footnote separately from a populated performance column. Do not fill a missing value by borrowing the adjacent model's data, extrapolating this example or adopting an unverified catalog column. Ask for the applicable performance document and configuration evidence. The presence of a liner size in a footnote also does not identify a replacement part number for an individual pump.
Volume and flow handoff checklist
These are suggested document checks, not an OEM maintenance procedure:
- Identify the pump, its available serial identity and configuration still to confirm.
- Save the original page and exact model heading; record a revision only when confirmed.
- Attach the liner column and speed row to each flow value.
- Store volume per stroke, flow per minute and original units in separate labelled fields.
- Preserve printed values and chart assumptions; label arithmetic as an editorial check.
- Keep footnote-only sizes, conflicting catalog records and missing documents unresolved.
- Assign responsibility for equipment applicability and approved limits before a decision.
A usable handoff lets another reader find the same source entry. It does not approve equipment operation or establish actual pump condition.
FAQ
Is 3.396 the GPM value for the selected column?
No. It is the printed gallons-per-stroke value. The selected 150 SPM flow entry is 509 GPM; preserve both labels.
Should 509.4 replace the printed 509 GPM?
No. Save 509.4 as the editorial multiplication result and retain the source's printed 509 GPM entry separately.
Can the extra liner-size footnote fill a missing flow column?
No. The footnote lists sizes but supplies no corresponding flow or volume values in this chart. Obtain the applicable source instead.
Does this chart establish measured delivery or parts fitment?
No. A chart reading example does not verify installed performance or replacement-part compatibility. Those require separate evidence.
Source and related records
Original source: NOV, How to Treat Your Type P Triplex Mud Pump, document 25-101131, PDF page 29. The original page image and extracted text were checked on October 9, 2026, Los Angeles time. Page 27's specification labels were checked for context; this article does not use adjacent-model entries.
Related tasks: 7-P-50 chart rows and units and 8-P-80 input and hydraulic power fields. This article addresses the distinct 9-P-100 volume-to-rate reading task and the boundary of a liner-size footnote.
Next step
For a technical document inquiry, provide pump identity, the original chart, selected liner column and speed row, plus any conflicting excerpt. Keep source reading, editorial calculations and equipment approval as separate records until the responsible reviewer confirms the documents needed for the intended decision.