Goetze 481 Manual Del Usuario página 9

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The pressure reducer is set at the factory to a secondary pressure of 3 bar (in
standard version) and is to be installed in the pipe without applying stress.
After the reducer we recommend to consider a slow downsection of 5 x D.
The flow direction must coincide with the arrow on the housing. The valve can be
installed in any mounting position. The pipe must be thoroughly flushed prior to
installation of the pressure reducer to prevent impurities picked up by the medium
having an impact on the satisfactory operation.
The pressure gauges are screwed into the sockets using hempor gasket strip and
indicate the prevailing secondary pressure (Fig. 681/481/682/482) or the prevailing
primary and secondary pressure (Fig. 682/482 DN 65 and DN 80).
The desired secondary pressure is set by turning the adjusting spindle at idle pressure
(zero consumption).
Turning the adjusting spindle in clockwise direction increasesthe secondary pressure
and turning the spindle in counter-clockwise direction reduces the secondary pressure.
During this adjustment always observe that, based on pressure and friction losses, the
end pressure adjusted at zero consumption is reduced further when drawing water, in
dependence of the quantity drawn off. The set desired value can be checked at the
pressure gauge arranged on the secondary pressure side.
Caution!!!
Before commissioning the pressure reducer, it should be ensured that both pressure
gauge connections on the housing are sealed with pressure gauges or sealing plugs.
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The device should be checked at intervals which correspond to the respective
operating conditions in order to eliminate any faulty operation which may be caused
by impurities and natural wear.
The operating or installation company must carry out an annual inspection according
to DIN 1988-8.
Caution!!!
When carrying out assembly work on the pressure reducer the corresponding system
part must always be relieved of pressure and emptied, depending on the medium
used.
At high temperatures you must always wait for the temperature to cool down to
ambient temperature.
Installation and Adjustment
Maintenance