5 Gas Valves E-LES
KRONOS 20
29
5.4
Mounting
The gas fittings of E-LES 50 have 2" B.S.P. threads. The gas valve may therefore option-
ally be screwed directly onto the gas mixer. The used standard pipe threads allow easy
connection to all common gas pipes. To reduce vibration it is recommended to mount the
gas valve at the end of the gas piping and to connect it to the gas mixer with a flexible
tube. The passage between gas piping and gas mixer must always be flexible.
The axial connection of the valve is usually used as gas inlet, the radial connection as gas
outlet.
The type E-LES 80 features connection flanges as shown in the above drawing. They cor-
respond to standard flanges, as they are common for pipe diameters greater than 2".
The type E-LES 30 also has flange fastenings. They can be extended with threaded flanges.
To safeguard error-free and low-wear operation, a gas filter with maximum mesh of 50 µm
must be installed in the gas piping.
All work on the valves must be carried out exclusively by trained per-
sonnel and in conformity with current standards and requirements.
The mounting position must be chosen in a way to avoid vibration and pulsation as much
as possible.
In addition, the valve’s mounting position must be chosen depending on the protection
type.
In general, mounting position is optional. But it should be avoided to mount the valves up-
side down with the step motor directed downward. If this mounting position should be
necessary consult HEINZMANN.
The gas valve must be equipped with sufficient equipotential bonding. On the gas valve a
screw with M6 thread is provided for the this kind of connection.
5.5
ATEX Certification of E-LES… Gas Valves
E-LES gas valves are ATEX certified according to EN 50021:1999, type of protection "n".
If the gas valves are used in such a context and require an ATEX certificate, the wiring of
the gas valve must be done and delivered by HEINZMANN too.
The inside of the gas-containing parts has not been taken into account for the
ATEX valuation.
On the housing of the E-LES gas valves two stickers have been applied. An additional
warning sign has been applied to the cover of the stepping motor control.
Warning
Note
Summary of Contents for E-LES 30
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