JWS340 Plunger

Original catalogue designation: JWS340 4”柱塞340-204
The JWS340 Plunger is an aftermarket replacement part for the JWS340 mud pump. In a plunger-type fluid end, the plunger reciprocates through the packing in the stuffing box, displacing drilling fluid on each pressure stroke to generate flow. The JWS340 model number is used for identification and fitment only; this is a replacement part, not an original-manufacturer component.
What it is
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.
Pump compatibility
FAQ
- Which mud pump does this plunger fit?
- It is built as a replacement plunger for the JWS340 mud pump.
- What does the plunger do?
- It reciprocates through the stuffing-box packing and displaces drilling fluid on each pressure stroke to produce flow.
Related parts
All brand names, model numbers and part numbers are used for identification and cross-reference only and do not imply original-equipment manufacture. This is an aftermarket replacement part.
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