Plunger
SJ300 Plunger
- Catalogue reference number
- Not recorded
- Catalogue brand
- Not recorded
Catalogue fields identify reference material. They do not confirm stock, OEM authorization or interchange. Verify the nameplate, original number and edition.

Original designation: SJ300 5柱塞P2300151AA
Catalogue model references
These are retained catalogue associations, not confirmed fitment for your equipment. Choose the model you want to review.
Catalogue description records
The SJ300 Plunger is an aftermarket replacement plunger for SJ300 mud pumps. It is the polished reciprocating element of the fluid end; the high-pressure seal is made by the stationary packing around the plunger rather than by a seal on the plunger itself. The model designation is used for identification only and does not imply original-equipment manufacture.
A plunger is the polished reciprocating element of a plunger pump fluid end; the high-pressure seal is made by stationary packing around the plunger rather than by a seal on the plunger itself.
Catalogue question records
Original catalogue questions are retained. Fitment and availability need technical review.
- Which mud pump does this plunger fit?
- It is built as an aftermarket replacement for the SJ300 mud pump.
- How is the seal made with a plunger?
- The plunger is the polished reciprocating element; the high-pressure seal is formed by the stationary packing around it, not by a seal carried on the plunger.
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