BSML4520 6KW 450mm Medium Pressure UV Lamp | Replacement for BSKY BWTS UV406 | Fiver Ultraviolet

Fiver Ultraviolet is a professional manufacturer of medium‑pressure (MP) UV lamps dedicated to marine ballast water treatment systems. We provide high‑performance, cost‑effective direct replacement UV lamps fully compatible with BSKY BWTS UV406 modules and the BSML4520 original lamp, helping ship owners and shipyards maintain full IMO & USCG compliance while lowering lifecycle costs.

Parameters of Fiver's BSKY BSML4520 replacement

Why Choose Fiver's BSKY UV Lamp Replacements? 

1> Perfect Compatibility Across All BSKY Systems with UV406 UV Reactors

• Direct BSML4520 replacement with identical dimensions and electrical parameters

• Universal fit for BSKY UV406 UV lamp requirements across BWMS system BSKY100, BSKY150, BSKY200 and BSKY250

• Plug-and-play installation – no wiring changes or control adjustments needed

• Full support for BSKY-CON controllers, sensors, and automatic cleaning systems

2> Optimized Performance for BSKY UV406Application

• Whether you need a UV lamp for BSKY150 or a BSKY250 UV lamp renewal, our lamps deliver:

• Consistent UV intensity meeting IMO D-2 and USCG standards

• Broad-spectrum efficiency for maximum organism inactivation

• Reliable operation with BSKY's EPT technology (hydrocyclone + ultrasonic + UV)

• Stable performance preventing system alarms or shutdowns

3> Significant Cost Savings Without Compromise

• Over 50% savings versus OEM BSKY UV lamp pricing

• Reduced total cost of ownership across your entire fleet

• Bulk pricing advantages for multiple vessel replacements

• Longer service intervals decreasing maintenance frequency and costs

4> Marine‑Grade Reliability

• High‑purity quartz sleeve for maximum UV transmittance and corrosion resistance

• Robust electrode design for stable operation under ship vibration and shock

• Long service life; reduces replacement frequency and maintenance downtime

• Resistant to fouling; supports UV406 automatic cleaning function

5> Quality & Manufacturing Assurance

• Each single lamp goes through strict lamp performance testing

• 100% end‑of‑line UV output and electrical testing

• Consistent batch quality for predictable performance

• Designed and tested specifically for marine BWTS duty

Our Commitment to You

Direct OEM‑equivalent performance without the OEM premium

Stable supply chain with short lead times for urgent replacements

Full technical support for installation, commissioning, and troubleshooting

Global delivery to support your fleet anywhere in the world

Contact Fiver Ultraviolet

Upgrade your BSKY BWTS maintenance with cost‑effective, reliable MP UV replacement lamps from a professional marine UV manufacturer.

ABOUT FIVER ULTRAVIOLET

Established in 1996, FIVER Environment Group Co., Ltd. is a distinguished manufacturer specializing in a comprehensive range of UV ballasts and lamps, with power outputs spanning from 4 to 60,000 watts. Our operations are supported by over 20,000 square meters of advanced production workshops. Underscoring our commitment to innovation and quality, we hold more than 70 invention patents and are certified with ISO9001, CE, and UL. FIVER's products are widely utilized across diverse sectors, including the water treatment, air purification, fume purification, waste gas treatment, and industrial curing systems industries.

F&Q: Some Questions You Might Concern

Q1: Is your Fiver BSML4520 lamp a direct replacement for the original BSKY UV lamp used in UV406 module?

A: Yes. Our BSML4520 is a 1:1 drop‑in replacement UV lamp for BSKY UV406 module, with identical dimensions (Φ20.5×450 mm), 6KW power 

rating, electrical parameters, and base structure. It fits BSKY150 and other BSKY BWMS using UV406 without any modification.

Q2: Will using a third‑party BSML4520 replacement lamp affect BSKY BWTS system operation or alarms?

A: No. Our lamp matches the original UV output spectrum and intensity, so it works fully with BSKY’s UV sensor, real‑time dose control, and 

BSKY‑CON controller. It will not trigger UV intensity alarms or system shutdowns.

Q3: Which Models Does This BSML4520 UV Lamp for?

A: The BSML4520 Replacement compatible with system that equipped with the UV406 UV module. Such as BSKY100, BSKY150,BSKY200 

and BSKY250.

Q5: Does this replacement lamp meet IMO D‑2 and USCG requirements for BSKY BWTS?

A: Yes. Our medium‑pressure UV lamp delivers stable disinfection performance to maintain compliance with IMO D‑2 and USCG AMS 

standards when used in BSKY UV406 module.

Q6: How does this BSML4520 lamp work with BSKY’s automatic wiper system in UV406?

A: The lamp’s outer dimensions and quartz sleeve QS630 design are fully compatible with BSKY UV406’s automatic wiper. It ensures stable 

cleaning performance and maintains high UV transmittance during operation.

Q7: What is the typical service life of your BSML4520 replacement UV lamp?

A: Our marine‑grade MP UV lamp offers a long operating life comparable to the original BSKY UV lamp, reducing replacement frequency and 

maintenance costs for ship crews.

Q8: Is this lamp compatible with the BSKY CON controller and remote control panel?

A: Yes. It supports full synchronization with BSKY_CON main controller and BSKY_CON_R remote panel, including UV dose monitoring, 

runtime recording, and fault feedback.

Q9: Can this lamp be used in both integrated and distributed BSKY BWTS installation?

A: Yes. It works for both skid‑mounted and distributed BSKY BWTS layouts, as used in new ships and retrofitted vessels globally.

Q10: Is your BSML4520 replacement lamp resistant to marine engine room environment?

A: Yes. It is designed to operate stably under ‑25℃ to 55℃, ship vibration, and salt‑spray conditions, matching the durability of the 

original BSKY UV lamp.