90L Industrial Ultrasonic Parts Washer | Large Ultrasonic Bath for Surgical & Medical Instruments

Product Overview

The K1024 is the 90L industrial ultrasonic parts washer in the K series: a large ultrasonic bath for surgical and medical instruments, built on a 550 × 400 × 400 mm SUS304 ultrasonic cleaning tank with 1200W of ultrasonics and a 4000W heater, all on single-phase power. It is the size we build for two loads the smaller machines handle badly — instrument work that arrives in trays and cassettes from a hospital sterile services unit or a dental decontamination room, and industrial parts that are simply too long or too deep for 60 litres.

Three things change between the 60-litre ultrasonic cleaner and this one. The ultrasonic bath is 50 mm longer, 50 mm wider and 50 mm deeper, which is 27% more floor area and 340 mm of working depth instead of 290 — the difference between standing a vessel upright and laying it on its side. The heater is twice the power, 4000W against 2000W, which matters more than the volume does on a cold start. And the ultrasonic output rises from 900W to 1200W, which holds the same power density rather than lifting it.

One thing does not improve, and it is worth saying before anything else: at 5,200W combined, this ultrasonic washing machine draws about 23 A at 230 V, so it wants a 25 A circuit at minimum. If the building gives you one 16 A single-phase circuit, the 60-litre ultrasonic cleaner is the honest recommendation — this page will not talk you out of it.

What 90 Litres Ultrasonic Parts Washer Actually Holds

Litre ratings are the least useful number on a specification sheet, and on this model they are worse than usual. We sell it as the 90-litre machine; the tank measures 550 × 400 × 400 mm, which is 88 litres to the rim. Both numbers are true; neither one is what decides whether your load fits, and the number that actually runs the process is smaller again.

Nothing in that table is rounded up, and the differences are not academic. Sizing a heater, a detergent dose, or a change-out interval off “90 litres” overstates each of them by about 15%. A cycle runs on roughly 77.

The three-number test. Measure your largest item before anything else:

1. Length — 520 mm inside the basket, 550 mm in the bare tank with the basket out
2. Width — 370 mm inside the basket
3. Height — about 330 mm of usable liquid above the basket floor (340 mm nominal, less a working margin)

If any of those three is exceeded, this is the wrong tank and no arrangement of the basket fixes it. The next size up is not a bigger version of the same thing — at 150 litres the ultrasonic bath goes to 600 × 500 × 500 mm and the heating moves to three-phase.

Depth is the number buyers under-check. A 350 mm tall vessel will not submerge in a 400 mm ultrasonic tank once the basket takes its 12 mm and 50 mm of headroom is left — it is a 330 mm vessel in practice. If your work is tall rather than long, the litre rating is not the constraint; the depth is.

Surgical Instrument Work: What It Does, and What It Does Not

90 litres is a recognised size in instrument reprocessing. European medical-device makers build 90-litre ultrasonic washers for CSSD and dental washing rooms, and the 88-litre / 550 × 400 mm format is sold across Asia for exactly that work. What varies between suppliers is not the hardware — it is what they are willing to promise. So here is the boundary, before the sales pitch.

What the industrial ultrasonic washer does. Cavitation removes blood, protein, saline residue, soft bone-cement residue, cutting fluid, and handling soil from instrument surfaces, box joints, ratchets, screw threads, serrations, matte and mirror finishes — without abrasion, and without the inconsistency of a brush. It reaches what a brush cannot: the inside of a box joint, the root of a serration, the thread of a cannulated screw.

What it does not do. It does not sterilise. It does not disinfect to a validated standard — that is a washer-disinfector’s job, tested to EN ISO 15883, and no ultrasonic bath replaces it. It does not remove endotoxin or prion protein. And it does not reliably clean the inside of a 2 mm lumen: cavitation does not travel round a bend in a channel, which is why lumened devices need flushing adapters or a dedicated irrigator. Dropping a laparoscopic instrument in a basket and hoping is the most common mistake in reprocessing, and no amount of ultrasonic power compensates for it.

Never start hot on blood. Protein coagulates above roughly 55–60°C and bonds to the surface once it does. A hot pre-soak makes a blood-soiled instrument harder to clean, not easier. Start at 40–45°C with an enzymatic detergent, clean, then rinse — and raise the temperature only for oil and grease loads, which are a different problem.

Open every hinge. A closed box joint is a shadowed cavity: cavitation cannot get in, and neither can detergent. Ratchets open, scissors apart, cannulae unassembled, and anything with a lumen flushed through before it goes in the basket.

Frequency, for instruments specifically. 40 kHz is the usual choice: finer bubbles, less surface erosion, kinder to matte finishes, laser marking, black coatings, and fine carbide edges. 28 kHz is for robust steel with heavy soil. On delicate ophthalmic and micro instruments, run reduced power and follow the device manufacturer’s reprocessing instructions — cavitation can erode a fine edge over repeated cycles, and no supplier should override a validated IFU.

Do not mix metals in one load. Stainless in contact with aluminium or carbon steel in a warm electrolyte makes a galvanic couple, and the aluminium loses. Anodised aluminium fixtures and plated parts go in a separate cycle, or not at all.

Instrument Trays, Cassettes and Containers

Instruments rarely arrive one at a time. They arrive as a set in a tray, a cassette, or a perforated container — and the number that fit is a plain arithmetic question about 526 × 376 mm.

One standard container per cycle. A 480 × 250 mm container fits lengthwise with room to spare; a second one would need 500 mm of width, which this tank does not have. If your workflow moves containers two at a time, the 175L (700 × 500 × 500 mm) or the 200L ultrasonic washing machine is the one you actually need, and buying 90 litres will only move the bottleneck.

Two open trays, or four small ones. A 300 × 200 mm open tray pairs with a second across the length; 250 × 150 mm trays go four to a load. That is the shape this tank is good at.

Loading rules that decide the result more than the power does.

• Leave 25 mm between trays and at least 30 mm between the load and the liquid surface. Cavitation shadows the middle of a packed basket.
• Never stack trays. Cavitation does not pass through a tray floor to the one beneath it.
• Keep everything off the tank floor and inside the basket — the floor is where the transducers are bonded, and a part resting on it blocks the energy going to its own underside.
• Load with the heaviest soil facing down. Debris falls away from the part instead of settling back onto it.

Where this ultrasonic bath stops. A department processing complete theatre sets all day does not need a bigger ultrasonic bath — it needs a washer-disinfector with a validated disinfection stage, and possibly a 200-litre ultrasonic unit ahead of it. We would rather say that at the quotation stage than after installation.

When the Load Is Industrial Rather Than Medical

The page URL says industrial ultrasonic parts washer, and it earns that name. The same 90 litres takes the component work that a 60-litre tank handles at its limit:

• Automotive component level — valve covers, timing covers, brake calipers, injector bodies, EGR valves, throttle bodies, DPF sections, small gearbox covers
• Hydraulic and pneumatic — cylinder barrels and rods up to about 520 mm, valve bodies, manifolds, fittings
• Machine shop — batch degreasing of machined castings, fasteners, brackets, mould inserts, parts with blind holes and cross-drilled galleries
• Restoration and small production — carburettor bodies, fuel pumps, instrument clusters, additive-manufactured parts with support residue

What it will not take is an assembly. A bare engine block is 480–520 mm long and 60–90 kg: the length fits, the weight does not, and there is no basket rating or lifting gear here for it. Cylinder heads over 520 mm, gearbox main cases, and long shafts go to the 150L (600 × 500 × 500) or the 500L with a hoist. The 100L model is the better answer for heavy degreasing in a wider tank; the 500L exists for blocks.

On baked carbon, be realistic. This industrial ultrasonic washer loosens combustion deposits and ring-groove lacquer at 60–70°C with an alkaline degreaser, given time. It does not strip them in one pass the way a 6000W tank does. If baked carbon is the daily workload rather than an occasional job, the bigger machines are the honest recommendation.

1200W Across 90 Litres: Density, Frequency and Control

1200W in 90 litres is about 13 W per litre — the same density band as the rest of the range, not a step up.

That number is what to compare when a competitor quotes “1200W high power” for the same 90 litres: it is not high power; it is normal power, and any page that calls it high is selling by adjective. What is genuinely above the class average on this machine is the heater — 4000W where most 90-litre builds use 3000W — and the separate generator.

Output runs from 5% to 100%. The low end is not decoration: it is what lets one tank take a 40 kHz instrument load at 60% power and a 28 kHz cast-iron component load at full output. A fixed-output machine cannot make that adjustment, and no operator technique replaces it.

Automatic sweep frequency shifts the output across a band around the set frequency so standing waves do not park in the same places cycle after cycle. On a 550 mm tank, the effect is visible on a foil test: without sweep, the foil shows bands of damage next to bands of nothing.

28 kHz or 40 kHz is fixed at order. 28 kHz gives larger, more aggressive bubbles for robust metal and heavy soil. 40 kHz gives finer cavitation for instruments, aluminium, precision parts, and any load where surface finish matters. You cannot switch later — if you genuinely need both, that is the dual-frequency range, not this machine.

4000W Heater: Twice the Power of the Machine Below It

The heater is the least discussed and most consequential difference between this machine and the 60-litre. 4000W warms 77 litres at the same rate the 60-litre’s 2000W warms 52 — the same minutes per litre, but 25 more litres per cycle:

The heater is for holding temperature, not for fast heat-up between loads. Leave the bath at working temperature through the shift, and the cost is paid once, not once per tray.

The thermostat runs to 100°C; you will seldom use the top of it. Cavitation weakens above roughly 80°C — as the solution nears boiling, vapour fills the bubbles, and they collapse less violently. A hotter bath is not a faster clean, and it costs evaporation, fume, and detergent life.

Working temperatures: 40–45°C for enzymatic chemistry on blood and protein (hotter denatures the enzyme and can fix the soil); 55–65°C for oils, grease and cutting fluid; 60–70°C for carbon film with an alkaline degreaser. If your process involves solvents, tell us before ordering — solvent work changes the heater arrangement and the lid, and must never run above the solvent’s flash point.

Single-Phase Power: 5,200 W is about 23 A

This is the section most buyers should read first, because it decides whether the machine can be installed at all.

No three-phase needed, but this is not a 16 A machine. The heater alone is 4000W, about 17.4 A at 230 V; add the ultrasonics, and you are at 23 A. A standard 16 A single-phase circuit will trip the moment both come on together, which is exactly when the machine is doing its job.

This is the top of the “ordinary socket” ladder. From 90 litres upward, plan the supply before you plan the floor space: give the machine its own circuit, do not share it with a welder, compressor or hoist, and allow headroom for inrush. On a 32 A circuit, the machine runs with margin, and the socket stays cool.

If you are on 110–120 V, tell us before ordering. The full 5,200W is not a 120 V load in any normal building; the heater and generator are specified to suit the supply you actually have, and that conversation needs to happen before the order, not after.

The Separate Generator, and Why it Matters Here

Most 90-litre ultrasonic parts washers in this class bolt the generator to the tank or tuck the board under the lid, inches from 77 litres of hot detergent. The K1024 puts the drive electronics in their own enclosure, and that changes three things.

The electronics run cooler and drier. The usual failure on integrated units is not a dead transducer — it is a corroded board. Keeping the drive section out of the splash and vapour zone is the cheapest reliability gain available at this price.

Service does not require draining the bath. A generator can be swapped or sent for repair while the tank stays full and in place. On a machine running several cycles a day, that is the difference between an hour and a lost shift.

The tank has fewer things to go wrong inside it. No control board sitting above warm chemistry.

What it does not buy you is redundancy. One generator feeds one transducer bank: if it fails, cleaning stops. Redundant, individually serviceable cabinets start at the 240-litre and 500-litre builds.

SUS304 Ultrasonic Bath, Basket and Drain

The ultrasonic bath is SUS304 stainless steel, formed, welded and finished so the interior does not key soil into the surface. 304 handles alkaline, neutral, and mild acidic aqueous chemistry, plus the enzymatic detergents used on instruments — the normal working range for both audiences on this page.

What 304 does not handle is chloride. Hypochlorite, ferric chloride, and hydrochloric acid blends will pit it, and instrument reprocessing is exactly where chlorine bleach turns up. If your procedure uses any of those, say so before ordering rather than after the first leak.

Basket, drain and lid. The stainless mesh basket lifts parts clear of the tank floor for full cavitation access, and it sets your working depth — which is why the usable depth in the table above is measured from the basket, not from the tank floor. A front drain valve empties the bath by gravity into a floor drain or a collection drum, without tipping 77 litres of warm chemistry by hand. The lid cuts noise and evaporation and holds temperature between loads; on a machine that stays hot all shift, it pays for itself in detergent alone.

Four castors let one operator move the machine to the drain point rather than carrying solution to it.

Where the 90L Ultrasonic Parts Washer Sits in the K Range

The step that matters. Between 60 L and 90 L, the gain is 50 mm in each direction and twice the heater — that is part size and heat-up, not tray count. Between 90 L and 100 L, the gain is 50 mm of width. Between 100 L and 150 L, the gain is power, depth and a three-phase heater. If your constraint is trays, the jump you want is 150 L or 175 L; if it is part length, 90 L is the first rung that clears 480 mm.

Full internal dimensions for every volume from 60L to 3110L are on the industrial ultrasonic parts cleaner series page, and the K series specification table lists every model side by side. Custom tanks on this platform have been built up to 6000 litres.

K1024 90L Ultrasonic Washer Specifications & Parameters

What’s Included

• K1024 90L ultrasonic cleaning tank with lid
• Separate ultrasonic generator cabinet
• Stainless steel mesh cleaning basket
• Power cable
• Packed in a wooden case, 870 × 730 × 820 mm, gross weight 90 kg

K Series Specifications Sheet

There are various volumes and tank sizes for the industrial ultrasonic parts washers. So that you can choose the most appropriate parts washer tank for your cleaning work. Check the ultrasonic tank specifications below. If they are not the specifications you need, don’t worry! Please provide detailed requirements, we are able to custom-make it for you!

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