NOV 7-P-50 is a Type P triplex mud pump. This page combines parts-identification information with the 7-P-50 chart in NOV document 25-101131, PDF pages 27–28. Chart figures describe the referenced document, not the operating approval of an installed pump.
TLDR
At the marked rated row, the chart gives 165 SPM, 500 input HP and 450 hydraulic HP. The 6-inch (152.4 mm) column gives 470 GPM; its maximum-discharge-pressure heading is 1645 PSI. Confirm the same model, liner column and source revision before comparing values.
Chart scope and operating limits
The seven liner columns run from 6.25 to 3.5 inches. The largest rated-row flow, 510 GPM, is in the 6.25-inch column with a 1515 PSI maximum-pressure heading; the highest pressure heading, 4830 PSI, is in the 3.5-inch column with 160 GPM at rated SPM. These extrema do not form one duty point. NOV states 90% mechanical and 100% volumetric efficiency for this chart. Actual flow and permissible operating conditions require verification against the installed equipment and current applicable OEM documents.
Parts-identification checklist
For a parts request, record the nameplate model and serial number, fluid-end configuration, existing part number and revision, liner bore, photographs and applicable manual/drawing. The catalog count below is an index of records; it does not confirm stock, complete factory coverage, interchangeability, lifetime or delivery date.
FAQ
Which liner dimensions are shown in the NOV chart?
The 7-P-50 chart shows 6.25, 6, 5.5, 5, 4.5, 4 and 3.5 inch liner columns. This source list is not a stock list or confirmation of fit for an installed pump.
What does the 6-inch column show at rated speed?
For the 6-inch (152.4 mm) liner, the rated 165 SPM row shows 470 GPM, with 500 input HP and 450 hydraulic HP. The column maximum-discharge-pressure heading is 1645 PSI. The chart uses 90% mechanical and 100% volumetric efficiency.
Can the pressure maximum and flow maximum be combined?
No. The 4830 PSI maximum heading belongs to the 3.5-inch column, while 510 GPM at rated SPM belongs to the 6.25-inch column. Keep each pressure heading with its own liner and speed row; confirm applicable operating limits separately.
Does a catalog entry confirm parts fit or availability?
No. Supply the pump serial number, fluid-end configuration, existing part number and revision, liner bore and applicable OEM drawing for verification. A catalog entry does not prove stock, interchangeability or delivery timing.