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The Mimaki UJF-3042 Gen UV Pressurization Damper Assy AG (part reference M011417) is a replacement UV-rated pressurization damper assembly for the Mimaki UJF-3042, UJF-3042FX, UJF-3042HG, and UJF-6042 UV flatbed printers. Built for the Ricoh GEN4 (MH2420) printhead platform used in the UJF series, this damper assembly manages UV ink delivery in Mimaki's pressurized ink supply system — filtering particles, stabilizing ink pressure, and protecting the GEN4 head from the reactive UV ink chemistry. This is a high-quality generic replacement corresponding to Mimaki part number M011417.
Quantity required varies by UJF model — order the correct number before installing.
• UJF-3042 and UJF-3042FX: require 3 dampers
• UJF-3042HG and UJF-6042: require 4 dampers
Replace all dampers simultaneously at every head service — partial replacement leaves worn units in the UV ink path causing pressure instability and contamination.
Product Details
| Specification | Detail |
|---|---|
| Mimaki Part Reference | M011417 (also listed as MP-M011417) |
| Assembly designation | Gen UV Pressurization Damper Assy AG |
| Type | Compatible (non-OEM) high-quality generic replacement |
| Compatible printhead | Ricoh GEN4 / MH2420 (Mimaki UJF platform) |
| Ink compatibility | UV-curable inks (pressurized supply system) |
| Dampers per UJF-3042 / UJF-3042FX | 3 dampers |
| Dampers per UJF-3042HG / UJF-6042 | 4 dampers |
| Replacement interval | Replace full set at every printhead service; replace when UV ink flow symptoms appear |
Compatible Printers
| Model | Dampers Required | Notes |
|---|---|---|
| Mimaki UJF-3042 | 3 | Standard 3-channel UV flatbed (A3 format) |
| Mimaki UJF-3042FX | 3 | FX = flexible substrate variant — same damper count as standard |
| Mimaki UJF-3042HG | 4 | HG = high-grade — extended colour channels, 4 dampers |
| Mimaki UJF-6042 | 4 | Larger format (A2) — 4 dampers |
About the Mimaki UJF Platform — Ricoh GEN4 and Pressurized UV Ink Delivery
The Mimaki UJF-3042 and UJF-6042 are A3 and A2 UV flatbed printers built around the Ricoh GEN4 (MH2420) industrial piezo printhead — a 384-nozzle, 7pl variable greyscale head with integrated heater and thermistor operating at up to 30kHz. Unlike eco-solvent printers that use negative-pressure (vacuum) ink delivery, the UJF series uses Mimaki's pressurized ink supply system ("UV Pressurization") — positive pressure pushes UV ink toward the printhead rather than relying on capillary draw. The M011417 damper assembly is designed for this pressurized delivery architecture: it must handle positive ink pressure, filter the reactive UV photoinitiators and pigments in the ink, and prevent pressure spikes from reaching the GEN4 nozzle array. The "Pressurization Damper Assy AG" designation identifies this as the specific damper assembly for the pressurized UV supply path in the UJF platform — not a generic eco-solvent damper repurposed for UV use.
Signs Your UJF-3042 Dampers Need Replacing
• Banding or nozzle loss on specific UV ink channels — pressure irregularity from a failing damper
• UV ink leaking at the damper connections — seal failure under positive pressure
• Inconsistent UV ink density across a print run — damper no longer buffering pressure spikes correctly
• UV ink starvation patterns — clogged internal mesh restricting pressurized flow
• Air bubbles entering the UV ink path — membrane or seal failure allowing atmospheric air ingestion against positive pressure
Why Buy from Digiprint USA
• High-quality generic M011417 — UV-rated for Ricoh GEN4 / UJF platform pressurized UV supply
• In stock in Doral, Miami FL — same day shipping before 2PM EST
• Order 3 for UJF-3042/FX or 4 for UJF-3042HG/UJF-6042 — confirm your model before ordering
• Ideal for Latin American Mimaki UJF operators and UV printing operations using Miami freight forwarders
View our full range of Mimaki printer spare parts and UV maintenance consumables stocked by Digiprint USA.
Frequently Asked Questions
How many M011417 dampers does my UJF printer need?
The UJF-3042 and UJF-3042FX require 3 dampers per service. The UJF-3042HG and UJF-6042 require 4. This difference reflects the HG and 6042 models' additional ink channels. Always replace the complete set — partial replacement leaves worn dampers in the UV ink path causing pressure imbalance between channels.
What does "UV Pressurization Damper" mean — is this different from a standard damper?
Yes. Standard eco-solvent and water-based printers use negative-pressure (vacuum) ink delivery where ink is drawn toward the printhead. The Mimaki UJF series uses positive-pressure delivery — UV ink is pushed toward the GEN4 printhead under controlled pressure. The M011417 "UV Pressurization Damper Assy" is specifically designed for this positive-pressure architecture and UV ink chemistry. Using a standard eco-solvent negative-pressure damper in a UJF UV pressurization system will not function correctly — the pressure dynamics are fundamentally different.
What printhead does the UJF-3042 use?
The Mimaki UJF-3042, UJF-3042FX, UJF-3042HG, and UJF-6042 all use the Ricoh GEN4 (MH2420) industrial piezo printhead — 384 nozzles, 7pl variable greyscale, 30kHz maximum frequency, with an integrated heater and thermistor. This is a fundamentally different printhead from the Epson DX series used in eco-solvent Roland, Mimaki JV, and Mutoh ValueJet printers. The M011417 damper is specific to this Ricoh GEN4 UJF platform.
Do you ship Mimaki UJF-3042 dampers to Latin America?
Yes — same day shipping from our Doral, Miami FL warehouse. Ideal for Latin American Mimaki UJF operators, UV flatbed studios, and promotional printing operations using freight forwarders in the Doral area.
