VGEM000-GB192
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VGE International B.V.
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Ekkersrijt 4304
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5692 DH Son Netherlands
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+31 499 461099
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www.vgebv.nl
Installation & User Manual
4.4 Irradiation chamber
4.4.1 Irradiation chamber
The heart of a VGE Pro MP UV system is the irradiation chamber in an inline construction which, in
combination with the medium pressure UV lamp, gives a low pressure loss and is easy to install because
the supply and discharge are in one line.
Due to the compact design, no sampling connections are available on the irradiation chamber because they
would be directly treated with UV light, which should not be the case with sampling connections.
The UV lamp is mounted in a lamp socket. No cap and/or cable needs to be removed to remove or install
the UV lamp, the cable for controlling the UV lamp is connected to the lamp socket and remains connected
to it.
The UV lamp comes with a lamp base with 2 contacts that make contact with the UV lamp socket. The UV
lamp is equipped with a return wire so that only one-sided mounting of the UV lamp is required, this also
saves installation and service space.
As a basic protection against overheating of the irradiation chamber, a bimetallic switch is attached to the
chamber by means of a wire end, which immediately switches off the UV lamp when the maximum
irradiation chamber temperature is exceeded.
4.4.2 Bimetallic switch irradiation chamber
A bimetallic switch is provided as standard on the irradiation chamber to monitor the irradiation chamber
temperature. The bimetallic switch is closed as standard so that the UV lamp can be switched on.
The irradiation chamber temperature can become too high (> 60 °C) if the irradiation
chamber contains no water or is not completely filled with water or if there is no flow
with an UV lamp switched on. If the bimetallic switch is activated, the UV lamp will
be switched off immediately.
The bimetallic switch has an automatic reset function, as soon as the bimetallic switch has cooled down
sufficiently (approximately 45 °C (irradiation chamber)), the contact will automatically close again.
4.4.3 Quartz tubes
Because UV lamps cannot be placed directly in the water (they do not reach their operating temperature, so
the UV production does not reach the desired level or they switch off again), they are placed in a protective
UV-C-permeable quartz tube in the irradiation chamber. In the VGE Pro UV MP series the quartz tubes are
mounted in such a way that the UV lamp can be replaced without dismantling the quartz tube while the
water pressure remains on the irradiation chamber. In order to have as few openings as possible in the
irradiation chamber (better for hygienic applications), a quartz tube is used that is closed on one side. As a
result, only on one side of the irradiation chamber free service space is required.
The quartz tubes are made of high quality quartz in order to allow the entire UV spectrum radiated by the
UV lamp to pass through with the lowest possible losses.
Depending on the water quality, quartz tubes can become dirty. It is therefore important to ensure that, if
necessary, the tubes are regularly cleaned or replaced. See the 'Maintenance' chapter for this.
