UV lamps, provided by SILAP, are made of a quartz tube, sealed at both ends, containing a small quantity of mercury and an inert gas.
We provide UV lamps made of quartz glass with wavelengths from 185 to 400 nm.
Thanks to its high thermal and mechanical stability, quartz tube, used to produce UV lamps, has high transmission efficiency and it is highly transparent to UV radiation.
Different kinds of quartz tubes are used according to the type of UV lamp to be produced:
The mercury medium pressure UV lamps are appreciated mainly for UV curing and drying applications and UV disinfection and oxidation applications.
Two kinds of lamp technology are available for our customers:
Here below some explanatory drawings.
A – Rolled sealed lamps
The sealing process of the lamp occurs on a lathe under vacuum. While perfectly heated, the Quartz will collapse around the leaves of molybdenum.
B – Pinched sealed lamps
The sealing process takes place using a spiker pinching machine; the quartz, suitably warmed, is pressed by two hammers.
For special applications, in addition to the usual mercury lamps, we provide a series of UV Lamps (Metal Halide) adding doping elements (metal halide) that change the spectrum of ultraviolet radiation, thus optimizing it for different possible applications.
The table below reports various lamp spectra in case of different lamp dopings:
|UV MEDIUM PRESSURE MERCURY VAPOUR LAMPS
These UV lamps, emit across the entire spectrum of ultraviolet light (UVA, UVB and UVC) with peak emission in the UVA range at 366 nm.
|UV MEDIUM PRESSURE LAMPS GALLIUM DOPED
The metal halide UV medium pressure gallium doped lamps emit UV radiation with peak emission in the UVArange at 420 nm.
|UV MEDIUM PRESSURE LAMPS IRON DOPED
The metal halide UV medium pressure iron doped lamps emit UV radiation with peak emission in the UVA range at 366 nm and 440 nm.
|UV MEDIUM PRESSURE LAMPS LEAD DOPED
The metal halide UV medium pressure lead doped lamps emit UV radiation with peak emission in the UVA range at 357 nm and 420 nm.
All lamps produced by us are available with different specifications/configurations, both in not doped quartz and in Ozone-Free quartz.
The main features of the medium-pressure UV lamps are as follows:
|Arc length||from 50 to 2500 mm|
|Power range||from 100 W to 60 kW|
|Shape of the lamp body||
|Max nominal power density per unit length (to be checked in the prototyping stage)||
|Useful life (lab tested and according to the power of the lamp – one ignition per day)||
|Surface temperature (lab tested and according to lamp power)||from 600°C to 900°C|
We can produce medium pressure UV lamps suitable for almost all UV systems; the following is a list of the necessary information for spare parts: