O-Ring for SITA Quartz Sleeve SMP Series, article 3820-0111. Fits: SITA SMP series. Sleeve and chamber seals harden under UV, heat and chlorinated water. Replace them at every lamp or sleeve service; a re-used O-ring is the usual cause of a leaking sleeve gland. SITA SMP series data: medium-pressure lamps from 300 W to 12 kW, lamp life up to 10,000 h, in-line chamber in AISI 316L, 10 bar. Spare part for UV disinfection systems of S.I.T.A. srl, Genoa, Italy, which builds low-pressure, amalgam and medium-pressure UV units for drinking water, food and beverage, aquaculture, swimming pool, marine and wastewater duty (series AL, LCD / Rack LCD, AM, IT, 440, HDPE, SBT, SMP, SSD, TOC, GR and Pool).