UV Steriliser 12 GPM 2 725 L/h stainless steel with timer - Aquapro PR-UV-12GPM-HT1

Complete UV steriliser set 12 GPM, horizontal

Complete UV steriliser: polished 304 stainless steel treatment chamber, one UV-C lamp, one quartz sleeve and a ballast with timer and audible alarm.

Treatment flow rate 12 GPM, i.e. 2 725 litres per hour. Inlet and outlet 3/4". Horizontal installation.

Aquapro reference PR-UV-12GPM-HT1.

UV-C treatment

Water circulates in the stainless steel chamber around a lamp emitting in ultraviolet C, at 254 nm. This radiation acts on the DNA of micro-organisms present in the water and prevents their multiplication.

The treatment is physical: it adds nothing to the water, does not alter taste, odour or mineral composition, and generates no by-products.

It has, however, no residual effect: the action occurs only in the chamber, during passage. Downstream recontamination is not treated. The steriliser must therefore be placed as close as possible to the point to be protected.

Ballast with timer and audible alarm

The ballast incorporates an operating time counter and a buzzer.

This is a real function, not a gimmick: a UV lamp continues to emit light long after losing its germicidal effectiveness. Radiation at 254 nm decreases with hours, whilst visible blue light remains. Without a counter, nothing indicates that the lamp needs replacing, and the installation runs giving the illusion of functioning.

The timer signals the deadline, the audible alarm makes it impossible to ignore. On an installation in a plant room, this is what triggers the service call at the right time.

Polished 304 stainless steel chamber

Stainless steel withstands pressure, does not degrade under UV radiation and can be cleaned. The polished interior reflects radiation and improves dose distribution in the chamber.

Working pressure 8 bar. Construction in 316 stainless steel is available as an option, for more aggressive waters.

Sizing: flow rate determines everything

A UV steriliser is sized by the maximum flow rate passing through it, not by average flow rate.

Water exposure time to the lamp decreases as flow rate increases. Beyond the nominal flow rate, the dose received drops and treatment loses its effectiveness, with no signal to indicate this.

2 725 L/h corresponds to the entry point of a large individual house or a small tertiary installation. Check the actual peak flow rate of the installation before confirming capacity.

Pre-filtration mandatory upstream

UV radiation does not penetrate particles. Turbid or loaded water creates shadow zones in the chamber, and micro-organisms sheltered behind a particle do not receive the dose.

Pre-filtration is therefore essential, typically 5 microns, more open at first stage on loaded water.

Water must be clear at the steriliser inlet: this is an operating requirement, not a comfort recommendation.

Specifications

• Model: horizontal
• Flow rate: 12 GPM, i.e. 2 725 L/h
• UV power: 40 W
• Inlet / outlet: 3/4"
• Number of lamps: 1
• Number of quartz sleeves: 1
• Ballast: yes, with timer
• Audible alarm: yes
• Working pressure: 8 bar
• Ambient temperature: 2 to 40 °C
• Power supply: 220 V
• Chamber: polished SS 304 stainless steel
• Construction: 304 SS stainless steel, option 316 SS stainless steel

Maintenance

UV lamp: annual replacement, according to hours recorded by the timer. A lit lamp is not an effective lamp.

Quartz sleeve: periodic cleaning. A deposit of scale or iron on the quartz blocks radiation. On hard or ferruginous water, this is the most frequent maintenance point.

O-rings: check at each intervention on the sleeve.

Switch off electrical power and depressurise before any intervention. Do not touch the lamp or quartz with bare hands: fingerprints bake onto the glass and create opaque spots.

Installation

Horizontal in-line installation, after pre-filtration, as close as possible to the point to be protected.

To be provided:

• an isolation valve upstream and downstream
• axial clearance to extract the lamp and sleeve: the unit measures 900 mm, approximately the same clearance is needed along the axis
• an electrical outlet nearby
• an ambient temperature between 2 and 40 °C
• lamp start-up a few minutes before the first draw after shutdown