Super Activa 500/21 Ultra-High Pressure Washer 500 bar
Alberti International Super Activa 500/21 — Professional Cold Water Ultra-High Pressure Washer
The Super Activa 500/21 is a professional cold water ultra-high pressure washer by Alberti International, designed for the most demanding industrial applications — descaling, surface preparation, tank cleaning, pipeline maintenance. With a working pressure of 500 bar, a flow rate of 1,260 l/h and 24.7 kW of power in service, it is the most powerful model in the Super Activa range. Available in Luxembourg, Belgium and France through Equindus.
500 bar. 1,260 l/h. Ultra-high pressure in the service of industry.
With a working pressure of 500 bar and a flow rate of 1,260 litres per hour, the Super Activa 500/21 operates in a category of its own. At this pressure level, water alone becomes a tool for descaling, scarifying and surface preparation — with no chemicals, no mechanical grinding, no abrasives.
The combination of 500 bar + 1,260 l/h makes it the most versatile model in the range: where the 500/15 favours precision at low flow rates, the 500/21 combines maximum pressure and sufficient water volume to cover large surfaces in reduced time.
Its 25 hp / 18.5 kW three-phase 400 V electric motor is fitted with integrated thermal protection and a star-delta starter (AST) to limit the current peak at start-up — essential on industrial installations with sensitive electrical protection systems.
Ceramic triplex pump with connecting rod system — industrial technology
The Super Activa 500/21 is fitted with a 3-ceramic-piston pump with connecting rod-crankshaft system and a brass pump head. This architecture, identical to that of AR Professional machines, guarantees rigorously constant pressure at 500 bar, minimal piston wear and a service life far exceeding that of cam or wobble-plate pumps found in consumer-grade equipment.
The flexible coupling with guard between the motor and the pump absorbs vibrations and protects both components from start-up shocks — a key element on machines of this power running in continuous cycles.
Key pump and transmission features:
Ceramic pistons — resistance to abrasion and chemical agents at high pressure
Brass pump head — robustness and sealing integrity at 500 bar in continuous service
Connecting rod-crankshaft system — constant pressure, low pulsation rate
Flexible coupling with guard — vibration absorption, motor and pump protection
Integrated pressure regulator — precise adjustment according to application
Stainless steel frame. Star-delta starter. Industrial construction.
The Super Activa 500/21 is built to operate in the harshest environments. Its stainless steel casing protects the electrical and mechanical components from humidity, chemicals and impacts. Its robust frame mounted on rubber wheels ensures operational stability and on-site mobility despite the machine’s 160 kg.
Onboard technical equipment:
Stainless steel casing — enhanced protection against corrosion and impacts
Glycerine-filled pressure gauge — stable pressure reading under vibration conditions
Three-phase electric motor with thermal protection — safety during extended cycles
Star-delta starter (AST) — reduced current peak at start-up, network protection
Ergonomic tubular handle — comfortable grip for on-site movement
Rubber wheels — stability and manoeuvrability on industrial floors
Ultra-high pressure industrial applications
At 500 bar, the Super Activa 500/21 is not a washer in the conventional sense. It is a surface preparation, descaling and heavy industrial maintenance tool — used in sectors where conventional mechanical or chemical methods are unsuitable, too slow or too costly.
Recommended sectors and applications:
Heavy industry — descaling of metal structures, tank and vessel cleaning, coating removal
Construction & civil engineering — concrete scarification, surface preparation before resurfacing or waterproofing
Petrochemicals & energy — pipeline cleaning, heat exchangers, valves and pressurised equipment
Naval & maritime — hull descaling, antifouling paint removal, treatment of port structures
Food processing — deep cleaning of production lines, silos, process equipment
Industrial maintenance — preventive servicing of machine tools, compressors, industrial furnaces
Technical specifications
Reference: Super Activa 500/21 — code B200043/1
Maximum pressure: 550 bar
Working pressure: 500 bar (7,250 psi)
Working flow rate: 1,260 l/h (333 gph)
Motor power: 25 hp / 18.5 kW (24.7 kW in service)
Rotation speed: 1,450 rpm
Power supply: 400 V three-phase 3~ / 50 Hz
Pump type: Triplex — ceramic pistons, brass head, connecting rod-crankshaft system
Starting system: Star-delta (AST)
Coupling: Flexible with guard
Structure: Robust frame + stainless steel casing, rubber wheels
Net weight: 160 kg
The full Super Activa range — Choosing the right model
The Super Activa range covers a very wide spectrum — from 200 bar to 500 bar working pressure, from 900 to 1,800 l/h flow rate. All models share the same ceramic triplex pump architecture and the same stainless steel frame. The choice of model depends primarily on the pressure required by the application and the flow rate needed to cover surfaces within the available time.
| Model | Code | Max pressure (bar) | Working pressure (bar) | Flow rate (l/h) | Working power (kW) | Power supply | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 200/30 | B200047 | 230 | 200 | 1,800 | 14.8 | 400 V 3~ / 50 Hz | 122 |
| 350/21 | B200048 | 380 | 350 | 1,260 | 16.8 | 400 V 3~ / 50 Hz | — |
| 400/18 | B200049 | 450 | 400 | 1,080 | 19.8 | 400 V 3~ / 50 Hz | 140 |
| 400/21 | B200049/1 | 450 | 400 | 1,260 | 19.8 | 400 V 3~ / 50 Hz | — |
| 500/15 | B200050 | 550 | 500 | 900 | 19.8 | 400 V 3~ / 50 Hz | 140 |
| 500/21 ★ | B200043/1 | 550 | 500 | 1,260 | 24.7 | 400 V 3~ / 50 Hz | 160 |
★ Model featured on this page. The 200/30 prioritises a very high flow rate (1,800 l/h) at moderate pressure for cleaning large surfaces. Models from the 350/21 to the 500/21 progressively increase in pressure for descaling and industrial surface preparation applications. Contact Equindus for selection advice based on your application and electrical installation.
Your Super Activa 500/21 with Equindus
Are you looking for a cold water ultra-high pressure washer for your industrial installation, construction site or maintenance operation in Luxembourg, Belgium or France? Equindus offers the Super Activa 500/21 with technical selection advice, delivery and after-sales support.
Our teams guide you in choosing the accessories suited to your specific applications — ultra-high pressure lances, rotary nozzles, 500 bar gun, reinforced hose reel — so the machine is immediately operational according to your field constraints.
For projects requiring on-site installation, three-phase connection or technical commissioning, our teams travel to Luxembourg and to the border regions of Belgium and France.
FAQ — Super Activa 500/21
Why choose 500 bar rather than a standard 200-300 bar washer?
At 200-300 bar, you clean. At 500 bar, you descale, scarify and prepare the surface. This pressure removes adhering coatings, deep rust, degraded concrete or mineral deposits that standard machines cannot treat — without aggressive chemicals and without mechanical grinding. The Super Activa 500/21 is aimed at professionals whose core activity is surface preparation, structural rehabilitation or heavy industrial equipment maintenance.
What is the difference between the 500/15 and the 500/21?
Both models deliver the same working pressure of 500 bar. The difference is flow rate: 900 l/h (15 l/min) for the 500/15, 1,260 l/h (21 l/min) for the 500/21. A higher flow rate allows larger surfaces to be covered in the same time and enables the use of multi-head accessories. Working power increases from 19.8 kW to 24.7 kW, and weight from 140 to 160 kg. For descaling applications over large surfaces, the 500/21 is more productive.
What electrical installation is required for the Super Activa 500/21?
The Super Activa 500/21 runs on 400 V three-phase 3~ / 50 Hz. It is fitted with a star-delta starter (AST) that reduces the current peak at start-up — an advantage on installations with sensitive differential protection systems. Plan for a circuit breaker rated for 24.7 kW in service. Contact Equindus to validate your installation before ordering.
What specific accessories are needed to work at 500 bar?
At 500 bar, standard accessories from conventional washers are not suitable. You need high-pressure hoses certified for this pressure range, guns and lances rated for 500 bar, as well as nozzles adapted to the application (0°, 15°, rotary). Equindus guides you in selecting accessories compatible with the Super Activa 500/21.
Does Equindus deliver the Super Activa 500/21 to Belgium and France?
Yes. Equindus delivers its professional equipment to Luxembourg, Belgium and France. For orders including on-site commissioning or technical support, our teams travel to all three countries. Contact us at +352 23 65 14 93 or via info@equindus.lu for a quote.
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Manufacturer’s website: Alberti International — Super Activa
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