The ANSI B73.1 medium frame is one of the most widely installed process pump sizes in the world. Plants keep them running for decades, which means the demand is not for new pumps — it is for wet-end parts that fit pumps whose original documentation was lost two maintenance managers ago.
Single replacement parts, quoted from the worn component, with the interfaces measured rather than looked up.
Repeat batches of the fast-moving wet-end items, packed and labelled for your stock system.
Build-to-print supply under your drawing revision control, with first-article approval before series release.
Matched impeller and wear-ring sets so the clearance is reset when the impeller is, instead of one year later.
These surfaces decide whether the part drops in. Every one is confirmed against your part or print rather than a catalogue number.
| Interface | How it is established |
|---|---|
| Impeller OD | Confirmed against your part or drawing — sets head at a given speed |
| Bore & keyway | Measured on the existing shaft, not taken from a catalogue |
| Hub height | Sets axial position relative to the casing face |
| Vane count & profile | Matched to the original hydraulic design |
| Rotation | Confirmed from the pump — a mirrored part looks right and pumps badly |
| Wear ring clearance | Set to the service and the pumped fluid |
The closed version holds its clearance at replaceable wear rings and is more efficient. The semi-open runs against the casing face, tolerates solids and can be re-shimmed in service instead of replaced.
One piece. Most enquiries on a specific frame are single replacements.
Both. Bare castings suit shops with their own machining capacity; the default is fully machined, balanced and inspected.
Yes — that is the normal case. We work from the worn part, since no current drawing is generally available for a discontinued frame.
EN 10204 3.1 material certificate per heat, dimensional report against the agreed revision, and the balance report stating the grade achieved.
Yes, with export packing for sea or air freight. Destination and Incoterms are agreed on the quotation.
Upload a 2D drawing, 3D file, nameplate photo or a picture of the worn part. We review material, tolerances, process route and inspection needs, then come back with a firm quotation.
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