The 14 mm piston (plunger) for the AZ pump is a working component of a high-pressure pump, responsible for pressure generation and stable operation of the pump section. In service, it is replaced when the working surface is worn, mechanically damaged, or during pump regeneration.
MPN / reference: 43.005
APPLICATION
The plunger is used in pump service work, including:
- replacement of the piston/plunger in AZ pumps,
- regeneration of the pump working section after long-term operation,
- repairs after pressure parameter drops and unstable operation,
- pump overhauls where seals and cooperating components are inspected.
SYMPTOMS - WHEN IT IS WORTH REPLACING
Typical symptoms of plunger wear or damage:
- drop in working pressure and reduced performance,
- jet pulsation and pressure fluctuations (after excluding nozzle and valves),
- leaks in the pump section related to accelerated seal wear,
- unusual friction or noise from the pump area,
- scratches, pitting, or other damage to the plunger surface after disassembly.
HOW TO CHOOSE THE RIGHT ELEMENT
Piston/plunger selection must be carried out precisely:
- by MPN / manufacturer reference: 43.005,
- by working dimension: 14 mm,
- by comparison with the disassembled element: check diameter, length, and geometry.
Accurate matching is crucial for pump section tightness and seal durability.
COMPATIBILITY
The element is described as intended for AZ pumps.
For safe selection, compatibility should be confirmed by MPN 43.005 and pump documentation/parts list. Selection solely by the “14 mm” description without reference verification is not recommended.
[faq]
Does the 14 mm plunger fit every AZ pump?|Not always. Within one pump family, different design variants may exist. The most reliable method is selection by MPN 43.005 and comparison with the disassembled part.
When replacing the plunger, do the seals also need to be replaced?|In service practice, this is often recommended because worn seals can shorten the service life of a new plunger and worsen system tightness.
Can I use a replacement piston/plunger?|A replacement can be considered only with full compatibility of dimensions, geometry, and working-surface quality. In pump working elements, tolerances are critical, so the reference point should be MPN and technical documentation.
[/faq]
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