Reciprocating Rod Pumps
API-compliant rods, barrels, and components
ELSI's spare-parts catalogue is governed by API Specification 11AX — the international standard for subsurface sucker-rod pumps and fittings. The standard does three things that matter to the operator: it makes the parts interchangeable, it forces full traceability, and it sets the inspection regime every lot has to pass.
We hold an API 11AX licence at the Brazi facility. Everything in this catalogue conforms to the dimensional, material, and finish requirements of the spec, alongside our own ISO 9001 / ISO 14001 / ISO 45001 systems.
Only dimensions affecting interchangeability are fixed by the spec — every ELSI part fits any compliant pump from any API 11AX-licensed manufacturer.
Each part is permanently marked with manufacturer mark, part number, material identification symbol, and date of manufacture — failure analysis stays straightforward.
Components are dimensionally inspected by sampling at AQL 4.0% (Inspection Level I). Material certificates of compliance ship with every lot.
The Master Part Numbering System assigns a letter to each component family. Knowing the family code lets you spec parts unambiguously across manufacturers and decades of installed equipment.
Pump barrels in thin-wall, heavy-wall (rod and tubing variants), and special-plunger configurations.
Standing-valve and traveling-valve cages — top-open, top-plunger, and closed plunger-pin variants.
Valve-rod, barrel-cage, and plunger bushings — sized to tubing rather than bore.
Plated and spray-metal-coated plungers built to dimensional and surface-finish tolerances tighter than the base spec.
Pull tubes, valve rods, and pump fittings — material grades selected for the service environment.
Ball-and-seat assemblies vacuum-tested and certified by ball hardness per applicable standard.
Hold-down cups and seating elements — elastomers and metal cups for stationary-barrel and traveling-barrel pumps.
Wrench flats, threaded connections, profile nipples, and the small parts that finish out an assembly.
Every API 11AX component has a deterministic part code. Once you know the segments, ordering across manufacturers and back-catalogues becomes a single-line conversation.
A thin-wall, rod-style barrel sized for a 2.000-inch bore with sucker-rod thread.
| Bore | Code | Typical service |
|---|---|---|
| 1¼″ | 125 | Light service rod pumps |
| 1½″ | 150 | Standard rod pumps |
| 1¾″ | 175 | Medium-displacement service |
| 1²⁵⁄₃₂″ | 178 | Slim-hole tubing pumps |
| 2″ | 200 | Most-common general service |
| 2¼″ | 225 | Higher-volume rod pumps |
| 2½″ | 250 | High-volume tubing pumps |
| 2¾″ | 275 | Heavy-duty tubing-pump applications |
| 3¾″ | 375 | High-rate, large-bore service |
| Tubing OD | Code |
|---|---|
| 1.900″ | 15 |
| 2⅜″ | 20 |
| 2⅞″ | 25 |
| 3½″ | 30 |
| 4½″ | 40 |
Bushings, hold-down assemblies, and tubing-side hardware use the tubing-size code (15 / 20 / 25 / 30 / 40). Pump-end components use the bore-size code.
API 11AX Section 9 publishes named material tables for every component class. Every ELSI part ships with the corresponding material identification symbol stamped on the body and recorded on the material test report.
The marking requirements in API 11AX §8 are non-negotiable. Every component coming out of Brazi carries the full set, permanently affixed to the body — so the part you receive in the field can be traced back to its lot, its material, and its inspection record without ambiguity.
On pump assemblies (rather than individual components), marking additionally includes the pump designation per the API 11AX assembly schedule — barrel type, plunger length, fit, and the size/tubing codes you saw in the catalogue above.
Common API 11AX components ship from stock. For anything bespoke or sour-service, our application engineers will spec it against your pump record.