Plunger 12mm L-75,3mm

The 12 mm plunger (piston) for the 1050 series is a working part of a high-pressure pump responsible for pressure generation in the system. In service practice, it is replaced when the working surface is worn, mechanically damaged, or during pump-section refurbishment.

MPN / reference: 49209
Dimensions / size: 1.2 × 7.3 × 1.2 cm

APPLICATION

Plunger used in service work on pumps in 1050-series units, including:

• replacement during refurbishment of the pump working section,
• pump repair after pressure-performance drop,
• overhaul after long operation or operation in harsh conditions,
• high-pressure system service together with inspection of cooperating parts.

SYMPTOMS – WHEN IT’S WORTH REPLACING

Typical signs of plunger wear or damage:

• drop in working pressure and reduced performance,
• jet pulsation and unstable pump operation (after ruling out nozzle/valves),
• leaks in the pump section related to accelerated seal wear,
• unusual friction or noise from the pump area,
• scratches, pitting, or other surface damage found after disassembly.

HOW TO CHOOSE THE RIGHT PART

Selection should be precise:

• by manufacturer MPN / reference: 49209,
• by working dimension: 12 mm and matching length/geometry to the removed part,
• by direct comparison with the removed component: check diameter, length, and working-surface condition.

Correct fit is critical for pump-section tightness and durability - incorrect dimensions can cause rapid seal wear and pressure loss.

COMPATIBILITY

Part described for 1050 series units. Confirm compatibility by MPN 49209 and pump technical data (spec table / parts list). Do not select only by “12 mm” without reference verification.

[faq]

Does a 12 mm plunger fit every 1050-series pump?|Safest approach is confirmation by MPN 49209 and pump documentation. Variants can exist within the series, so diameter alone may not be sufficient.
Should seals be replaced when replacing the plunger?|In service practice this is often recommended, because worn seals can shorten new-plunger life and reduce sealing quality. Final decision depends on seal and guide condition after inspection.
Can I use an aftermarket plunger/piston?|Yes, if dimensions, geometry, and working-surface quality fully match. In high-pressure working parts, tolerances are critical, so use MPN and pump specification as the reference.

[/faq]