UV systems used in beverage production are easy to overlook until one lamp fails.
At a soft-drink plant in the Voronezh Region, water is used throughout the production process: for rinsing, syrup preparation and filling operations. The UV equipment operates in clean indoor areas where microbiological control is especially important.
When one of the UV lamps failed, the plant needed a replacement that could be installed without modifying the existing system.
The problem
The original system used an imported UV SEF U-3201 lamp.
After it reached the end of its service life, finding a replacement became more difficult. The main task was therefore to identify a compatible lamp with the same basic mechanical and electrical characteristics.
The technical team also wanted to avoid a long production interruption.
Several things were important:
the replacement had to fit the existing UV section;
no changes to the lamp holder or electrical system should be required;
the lamp had to operate in the same continuous mode;
a test sample had to be checked before ordering a larger batch.
Selecting a compatible lamp
A UVL 19320 amalgam low-pressure UV lamp was selected as a replacement.
The relevant specifications were:
electrical power: 320 W;
UV output: 105 W;
operating current: 2.1 A;
rated service life: up to 16,000 hours;
lamp type: low-pressure amalgam;
overall length: 1,554 mm;
arc length: 1,475 mm;
tube diameter: 19 mm;
base diameter: 23 mm;
water operating temperature: 5–40 °C;
installation: horizontal or vertical;
operating mode: continuous;
ozone-free design.
For this project, physical compatibility was just as important as electrical performance.
A lamp with the correct power would still have been unsuitable if its length, base geometry or mounting dimensions differed from the original.
Testing before full replacement
Instead of replacing all of the lamps immediately, the plant first ordered one test unit.
It was installed in the existing UV section and checked under normal operating conditions.
The test showed that no mechanical or electrical modifications were required.
After that, another five lamps were ordered.
This approach reduced the risk of purchasing a full batch before compatibility had been confirmed.
Why a test installation matters
Replacement UV lamps are often selected by wattage, but that is only part of the specification.
Several parameters may affect compatibility:
overall length;
arc length;
tube diameter;
lamp base;
operating current;
ballast characteristics;
mounting orientation;
operating temperature.
This becomes particularly important when replacing lamps in older imported systems where the original model is difficult to source.
A sample installation can reveal issues that are difficult to identify from a datasheet alone.
Avoiding unnecessary equipment modification
In this case, the replacement lamp matched the existing system closely enough that no changes were required to the UV reactor.
That meant the plant did not need to:
replace the lamp holders;
modify the electrical cabinet;
change the reactor geometry;
rebuild the UV section.
From an engineering perspective, this is often the simplest outcome when replacing discontinued or difficult-to-source components.
What this case shows
When an imported UV lamp becomes unavailable, the main challenge is not necessarily finding a lamp with similar power.
The more important question is whether the replacement behaves as a true system component.
A practical replacement process can therefore look like this:
record the original lamp dimensions and electrical parameters;
select the closest compatible model;
test one lamp in the actual equipment;
verify startup and normal operation;
only then order the remaining quantity.
For industrial water-treatment equipment, this approach can reduce both technical risk and unnecessary modifications to an otherwise functional system.
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