Trojan 338299-401 UV lamp, 500 W low-pressure high-output Solo Lamp for TrojanUVFlex 100 / FlexAOP 100

Trojan Technologies part number 338299-401 — replacement UV lamp for the TrojanUVFlex 100 and TrojanUVFlexAOP 100 drinking-water UV disinfection reactors. Lamp technology: low-pressure high-output (LPHO) 'Solo Lamp' family, 500 W nominal rating. Emits germicidal UV-C at 254 nm through the quartz sleeve to inactivate waterborne pathogens including Cryptosporidium, Giardia, adenovirus, and enteric bacteria. In the FlexAOP variant, the 254 nm emission also drives hydrogen peroxide (H2O2) photolysis to generate hydroxyl radicals for advanced oxidation destruction of taste-and-odour compounds, endocrine disruptors, pharmaceuticals, and other micropollutants. System fit: TrojanUVFlex 100 (municipal drinking-water UV disinfection); TrojanUVFlexAOP 100 (same reactor + H2O2 injection for advanced oxidation). Each reactor uses a small array of these Solo Lamps sized to the design flow and UV transmittance of the source water. Compatible spares (same reactor family per Trojan's official parts page): 338299-301 (UV lamp, 1000 W Solo, TrojanUVFlex 200 / FlexAOP 200); 822639 (quartz sleeve, Flex 100 / FlexAOP 100); 822518 (quartz sleeve, Flex 200 / FlexAOP 200); 822681 (wiper seal kit, both Flex sizes); 916841 (lamp driver, both Flex sizes). Order the correct QUARTZ SLEEVE part number alongside the lamp — a lamp change is the routine moment to inspect and replace the sleeve. Recommended installation: verify power isolation and lockout per site LOTO procedure; drain the reactor cell per the TrojanUVFlex Operation and Maintenance Manual; remove the lamp-end cap; disconnect the lamp driver connector; extract the lamp with the quartz sleeve in situ; inspect the sleeve for scale / crazing / cracks; wipe or replace as required; insert the new lamp, reseat the driver connector, and reassemble. Log the lamp-change date to the plant CMMS for the reactor-hours meter. Typical Trojan LPHO amalgam lamps are rated in the ~12,000 h to ~15,000 h effective-life range in Trojan literature; verify the specific end-of-life hours for 338299-401 against the current TrojanUVFlex O&M Manual or warranty documentation for that reactor before committing a plant scheduled-replacement cadence. Applications: municipal drinking-water disinfection primary UV barrier; groundwater disinfection under the Ground Water Rule; surface-water treatment plant final barrier post-filtration; industrial process-water disinfection; secondary disinfection in bottling / brewing / pharma; advanced oxidation for taste and odour in FlexAOP 100.