01 / MACHINE
01 / 03 Machine views
FULL MACHINE
Complete machine arrangement
Overall machine view showing the complete fabric handling and spray finishing arrangement.
2450 stenter · 2 000 mm working width Finish the cloth,
Finish the cloth,
not the bath.
A pad-mangle soaks fabric to 60–70% pick-up and then burns gas driving the water back off. This sprays what's needed onto both faces at 25%, and meters it electronically. Scroll, and the fabric starts running.
Nozzles24
Both faces12 + 12
Standoff245mm
01 / FABRIC PATH14 m/min
The web turns vertical to be sprayed
Part129 · web 2 000 mm wide · 4.2 m path
Fabric enters low, wraps a roller and climbs vertically through the gap between the two nozzle banks — which is why both faces can be treated in a single pass. It leaves over the top roller and drops away to the stenter chain.
- Working width2 400 mm
- Vertical pass≈ 820 mm
- Faces treatedBoth Sides
- Path length4.23 m
02 / BASE FRAME18 m/min
It bolts onto the stenter you already own
miniheight2600 · DTFS bottom base m2026
The unit is a retrofit. The base carries the tank, pump and dosing circuit at floor level and takes the spray duct on the frame above, so the whole assembly drops into the entry of an existing 2450 stenter without moving the machine.
- FitsAny Size
- Overall footprint3.75 × 5.23 m
- Height class2 600 mm
- MountingM16, bolted
03 / SPRAY DUCT40 m/min
The part that does the work
Spray_duct_subassembly · 74 parts · 777 800 tri
Everything from here on is the duct assembly, loaded as its own file so it can be shown at full detail without the rest of the machine in the way. Two mirrored banks face each other across the web on a common tilting frame.
- Parts74
- Bank separation667 mm
- Duct length2 816 mm
- SymmetryMirrored pair
04 / NOZZLE BANKS54 m/min
Twelve a side, 181.8 mm apart
AA250AUH ×24 · 418 860 tri
Pitch and standoff are the two numbers that decide whether you get a uniform coat or twelve visible stripes. Measured off the assembly: 181.8 mm between nozzles, 245 mm from tip to cloth. The uniformity chart below works from exactly those figures.
- Nozzles24
- Pitch181.8 mm
- Coverage span2 000 mm
- TypeAir atomising
05 / ONE NOZZLE58 m/min
Air does the atomising, not pressure
Nozzle.glb · 176 × 57 × 63 mm
An air-atomising head shears the liquid into fine droplets with compressed air instead of forcing it through a tiny orifice at high pressure. You get a soft, low-momentum cloud that lands on the surface rather than being driven into the yarn.
- Length176 mm
- AtomisingAir-assisted
- Droplet— µm VMD
- PenetrationSurface-biased
06 / GUIDE RAILS66 m/min
Standoff has to stay put
WS_10_40_1200 · WW_10_40_10_2 ×8
Profile rails and carriages hold the banks square to the web. If standoff wanders by ten millimetres across the width, the overlap between adjacent fans changes and you see it in the finished cloth — so the geometry is fixed mechanically, not adjusted by eye.
- Rail length1 200 mm
- Carriages8
- HoldsStandoff + square
- AdjustmentShimmed, locked
07 / WHOLE MACHINE80 m/min
282 parts, back together
2 151 720 triangles · 197 materials
The complete assembly as exported, nothing decimated. From here the page turns into instrumentation — how add-on tracks line speed, how uniform the coat actually is across the width, and what the whole thing saves against a padder.
- Mesh parts282
- Triangles2 151 720
- Materials197
- File93.2 MB glb
How it sprays
Twenty-four valves,
switching in sync.
Every nozzle runs off its own solenoid — not a single shared line held open. Drag the controls to see why the timing matters.
Coverage, illustrative
Cycle time20.0 ms
Pulse on-time2.0 ms
Pulses / sec50
Nozzle stateON
Illustrative model of the switching behaviour, for explanation — production timing is tuned per chemistry, line speed and fabric.
At 50 Hz, each valve opens and closes fifty times a second — open for roughly a tenth of every cycle, closed for the rest. That's fast enough that the fabric never sees the gap: what reads as one steady mist is really thousands of individually timed micro-doses a minute, replayed too quickly to tell apart. It's the same trick as a dimmed LED — switch fast enough and the flicker disappears. Slow the switching down and you can watch it fall apart into drips and dry patches — try dragging the frequency slider to 15 Hz.
Frequency stays put; duty cycle is what the controller moves. Across the working speed range it runs from about 6% at a crawl to 50% flat out, holding grams per square metre constant the whole way. That relationship is plotted further down.
The nozzle array
12 a side.
24 addressed on their own.
Two bars facing each other across the web, each carrying twelve nozzles at 181.8 mm pitch. Turn a bank off and only one face gets finished.
Spray ON · Both faces — all 24 nozzles fire together continuously while the fabric moves through the centre.
02 / SPRAY SYSTEM
01 / 03 Spray views
SPRAY ARRAY
Dual-face spray arrangement
Spray-system view showing the nozzle bank arrangement used to apply chemistry across the moving fabric.
Six reasons to spray
The finish you want.
Only where you want it.
Six production advantages from the RVR Ramdukes spray system brochure, presented as a continuous horizontal technical carousel.
06 / 06 LOT CONSISTENCY Same finish from first to last
There is no bath dilution and no tailing. Fresh chemistry is dosed against fabric width, GSM and line speed so the last metre is finished like the first.
0 TAILING
Fresh dosing by width · GSM · speed
01 / 06 LIQUOR CONTROL Meter, don't soak
Only the chemistry required is metered onto the moving fabric. About 5 L stays in circulation instead of roughly 70 L standing in a conventional padder bath.
5 L IN CIRCULATION
vs. ~70 L standing in a padder bath
02 / 06 NON-CONTACT APPLICATION Non-contact spray
Twenty-four digital nozzles apply chemistry directly to the running fabric without a nip or applicator touching the cloth.
24 DIGITAL NOZZLES
12 + 12 nozzles for A and B sides
03 / 06 WIDTH UNIFORMITY ±2% across the full width
Every nozzle is controlled independently so the finish stays uniform from centre to selvedge across the complete fabric width.
±2% FULL-WIDTH UNIFORMITY
Nozzle-by-nozzle control
04 / 06 SELECTIVE FINISHING Spray only where needed
The operator can select both faces, A only, B only, or a narrow set of nozzle zones so chemistry is not sprayed into empty space.
A · B FACE + ZONE CONTROL
A + B · A only · B only · narrow zones
05 / 06 CHANGEOVER 5-minute auto clean
Eight automatic valves flush the nozzles, line and tank. The complete spray circuit is cleaned and ready for the next recipe in approximately five minutes.
5 min AUTO-CLEAN
8-valve flush · nozzles · line · tank
06 / 06 LOT CONSISTENCY Same finish from first to last
There is no bath dilution and no tailing. Fresh chemistry is dosed against fabric width, GSM and line speed so the last metre is finished like the first.
0 TAILING
Fresh dosing by width · GSM · speed
01 / 06 LIQUOR CONTROL Meter, don't soak
Only the chemistry required is metered onto the moving fabric. About 5 L stays in circulation instead of roughly 70 L standing in a conventional padder bath.
5 L IN CIRCULATION
vs. ~70 L standing in a padder bath
02 / 06 NON-CONTACT APPLICATION Non-contact spray
Twenty-four digital nozzles apply chemistry directly to the running fabric without a nip or applicator touching the cloth.
24 DIGITAL NOZZLES
12 + 12 nozzles for A and B sides
01 06
Chart 01 · Metering
Add-on control
Pressure sets droplet size; duty cycle sets volume. To hold grams per square metre while the stenter speeds up, the controller opens the nozzles for a larger fraction of each cycle. Drag across to scrub.
Duty cycle required vs line speed
30 g/m²
2.5 bar
24
2 000 mm
At cursor40m/min
Duty cycle—
Total flow—
Per nozzle—
Max speed held—
Droplet VMD—
Chart 02 · Geometry
Coverage uniformity
Twelve overlapping fans summed across the width. The defaults are the real numbers measured from the assembly — 181.8 mm pitch, 245 mm standoff. Change either and watch the coat go striped.
Deposition profile across the web
65°
245 mm
181.8 mm
0%
Uniformity CV—
Peak-to-valley—
Overlap factor—
Fan width at cloth—
Edge overspray—
Verdict—
On the line
Bolts into a line
you already run.
The unit is a retrofit. It drops into the entry of a stenter the mill already operates, where the padder used to sit.
1
Fabric feed
The roll unwinds and threads in exactly where a padder used to sit.
2
Digital spray
Twelve or twenty-four nozzles dose the moving web — no bath in between.
3
Stenter drying
Straight into the stenter frame you already have. No separate dryer to add.
4
Finished fabric
Rolled up — and the trough that needed draining and remixing simply isn't there.
Build the mill case
Not just spray.
A better operating model.
Four things a finishing manager is actually buying — then the arithmetic underneath them.
Single / dual side
Run both spray bars or isolate one face according to the finishing recipe.
Digital repeatability
Valve timing is an explicit process setting instead of relying only on mechanical bath pickup.
Stenter integration
Designed around a line the mill already operates, not a separate finishing island.
Discrete service points
Each position is visible, testable and serviceable rather than hiding the whole application system in one element.
Spray at low pick-up vs pad-mangle
180 g/m²
40 m/min
65%
25%
Water not applied—
Liquor volume cut—
Drying energy saved—
Gas equivalent—
CO₂ avoided—
Reduction—
The saving is mostly gas, not chemistry — it's the water that never had to be put on the cloth and then driven back off. Active add-on is the same either way.
Straight answers
The six things
every mill asks.
Including the ones where the honest answer is “not this machine”. You will hear these in the first meeting — better they are answered here.
This is the right question to ask about any spray system, and the answer is filtration plus flushing — not hope.
Two 430 strainers sit in the circuit ahead of the pump, and the liquor is filtered again before the manifolds. Because every position has its own valve, a partial blockage shows up as one narrow stripe rather than a ruined batch — and the controller can flag the position whose flow has drifted.
Each nozzle unclips from its own port. There is no header to strip down to reach one of them.
Straight answer: it will block if you run unfiltered liquor or leave chemistry standing in the lines overnight. Filtration spec and an end-of-shift flush cycle are part of the commissioning, not optional extras.
Technical data
What your engineers
need before they can plan.
Working range, utilities, footprint, controls and service intervals — the pack a project engineer asks for on the first call.
| Working width | 2 000 mm · measured from the assembly |
|---|---|
| Fabric weight | 40 – 400 g/m² ▲ |
| Line speed | 5 – 80 m/min · limited by stenter drying, not by the spray ▲ |
| Add-on range | 10 – 120 g/m² · both faces combined ▲ |
| Add-on repeatability | ± 3 % · to be confirmed against trial data ▲ |
| Faces treated | 1 or 2, selectable per recipe |
| Liquor viscosity | ≤ 50 cP ▲ |
| Liquor pH | 3 – 11 · wetted parts stainless and PTFE ▲ |
| Particle size in liquor | < 100 µm after filtration ▲ |
▲ Figures marked this way are engineering estimates or standard offerings pending confirmation against your build. Everything unmarked is measured directly from the CAD assembly. Confirm the marked items before issuing a quotation.
Where it's used
Built for finishing that
has to differ side to side.
Two banks, independently gated — so the two faces of the cloth do not have to get the same thing.
Fashion & apparel
Softening and hand-feel finishes without a full-immersion bath.
Sportswear & performance
Water repellents dosed precisely, without over-wetting the fabric.
Technical & functional
Fire-retardant and anti-microbial finishes applied at higher, targeted concentration.
Outdoor
Durable water repellent finishing, replacing a padder in an existing line.
Medical
Anti-microbial and anti-odour finishes with no cross-batch bath contamination.
Upholstery
Stain-resistant finishing on wide, heavier-gsm fabrics.
Water repellentsSoftenersStain resistantFire-retardantAnti-microbialAnti-odour
Measured from the assembly
Specification
Pitch, standoff, bank separation and working width are computed from part positions in the glb, not quoted from a datasheet.
Working width2 000mm
Nozzles24
Nozzle pitch181.8mm
Standoff245mm
Bank separation667mm
Spray planeVertical
Faces treated2
Tilt cylinders16
Duct length2 816mm
Machine envelope3.75 × 5.23m
Machine height2 650mm
Stenter2450
Notes
How this page works
Worth reading before you put it in front of a customer.
01Why does it need a local server?
Browsers won't let a page opened from your hard drive read other files sitting beside it — the same rule that stops a downloaded page rifling through your documents. The models are separate files, so they trip it. Running python3 -m http.server 8000 in the folder turns it into a proper site on your own machine and the restriction lifts. The drag-and-drop panel is the fallback when you can't.
02What is measured and what is modelled?
Everything geometric is measured: 24 nozzles, 181.8 mm pitch, 667 mm between banks, 245 mm standoff, 2 000 mm web, the vertical fabric pass, 16 Festo ADNGF-32-80 cylinders, the DAPS actuators and the Keyence sensor are all read out of your assembly. The performance figures are modelled — duty cycle, flow, droplet size, CV% and the savings comparison come from standard spray and drying relationships, sized to this machine's geometry. They behave correctly and the numbers are defensible, but they are not measurements from a running line. Replace them with trial data before quoting.
03The array diagram is a plan view
On this machine the web runs vertically and the two banks sit either side of it, 667 mm apart. The array diagram is therefore drawn looking down on the machine: the horizontal axis is the 2 000 mm working width, the two bars are the two banks, and the fabric travels out of the page. That is the same layout your earlier page used — it just wasn't labelled as a plan view.
04Why highlight in colour instead of hiding things?
Hiding a component loses the context of where it sits. Dropping everything else to about 20% and tinting the subject keeps the whole machine visible while making one thing unmistakable. The same mechanism serves two jobs — scrolling drives it automatically, and clicking any part drives it manually.
05Why is it slow to load?
133 MB across three files, 2.95 million triangles, nothing decimated. The 24 nozzles alone are 419 000 triangles and three M16 bolt patterns another 171 000 — turn the Fasteners button off to drop those. For anything customer-facing, run the files through Draco or meshopt; this assembly compresses to roughly a tenth.
Book a trial
Bring a roll of your fabric.
We'll run it through.
Nothing on this page settles the question for your cloth. A trial does, and it takes an afternoon.
What a trial involves
- Send 20–30 m of your fabric and the finish you currently apply, with its recipe and target add-on.
- We run it on the machine at your line speed, on the geometry shown on this page.
- You get the cloth back with the measured add-on, a uniformity figure across the width, and the duty cycle and pressure we used to get there.
- You compare it against the same fabric off your padder — hand, appearance, and the wet pick-up difference in black and white.
If the answer is that a padder suits your fabric better, we will tell you that. It is a shorter conversation than a bad installation.