Pallas (Sita) 550 LCD 2 x 40w - 100 lpm - 6.0m3/hr 1.5" connection

Sita 550 LCD: Twin-Lamp UV Disinfection System, 2 x 40W (100 l/min)

The Sita 550 LCD is the largest twin-lamp model in SITA's LCD commercial-grade UV range, manufactured in Italy to ISO 9001 quality standards and WRAS approved. Two 40W lamps in a single 304 stainless steel chamber (316 optional) give it the highest flow rate of the standard single-chamber LCD models before stepping up to the multi-lamp RACK series.

The LCD control panel gives you an LCD display, an hours-run meter, a red LED fault light, a free alarm relay contact (NO/NC, 2A max), a 4-20mA output, and an O-Norm/DVGW approved sensor — useful if you want to tie the system into a building management system. If you'd also like a UV intensity meter, a resettable lamp-life countdown, and automatic high-temperature shutdown, the LCD PLUS version of this model adds those.

Specifications

Who it's for

• Commercial premises needing the highest flow rate available from a single-chamber LCD system
• Sites wanting BMS-ready monitoring via the alarm relay and 4-20mA output
• Applications approaching RACK-series territory but not yet needing multiple lamps in separate chambers

Why it matters

UV systems should be sized generously against your actual site flow rate — as a rule of thumb, the UV's rated flow should be at least 4 times your required or achievable flow, or you should restrict flow to no more than 38% of the system's maximum rating. We'd also recommend physical pre-filtration ahead of the UV rather than relying on the UV alone: a triple-filter setup (5 micron string wound, 1 micron polyspun, then a 0.45 micron absolute filter) is a common specification, with two absolute filters in parallel where higher flow is needed.