ARAG 453 SERIE Uso Y Mantenimiento página 14

GB
6 USE
Power the valve using a suitable control device (refer to Tab. 1 for the exact absorption values).
- The two-way valve works as an open/closed switch (Fig. 4).
- The three-way valve with side connection (Fig. 5) works as a continuous flow switch (during
operation the couplings are communicating).
- The three-way valve with bottom connection (Fig. 6) works as a switch (during operation the
couplings are not in communication).
CAUTION: Do not run light valve for a long time, the inside gaskets could be
damaged and the valve could block up.
7 mAINTENANCE
The electric ball valves of the 453 series do not require any particular maintenance.
Internal cleaning can be carried out when the system to which the valve is connected is cleaned.
If the maintenance man needs to open the valve to check the seal or for extraordinary cleaning, before
fitting it back you must replace the seal kit of the orifice that was opened.
CAUTION: Fitting back the valve without replacing the seal kit can reduce the seal on
the internal ball and therefore cause leaks.
- Unscrew the bolts related to the orifice to be opened, then remove it and take out the inner gaskets
and the O-ring inserted in the internal seat of the flange that has been removed.
- Re-position all the gaskets in their seats, as shown in Fig. 7 (gasket (1) is not present on all mo-
dels), then close the flange.
- Insert the bolts in the holes, fit back the washers and screw in the nuts by hand.
- To ensure correct operation, the nuts (2) must be tightened using a dynamometric spanner cali-
brated according to that which is indicated in Tab. 1.
- Reconnect all the hydraulic connections.
- Restore electric power supply.
- Put the system under pressure ONLY WITH CLEAN WATER and check that the connections are
not leaking.
Further information on the special maintenance operations can be downloaded free of charge
from our Website www.aragnet.com.
8 DISPOSAl
The product must be disposed of in compliance with the legislation in force in the country in which
this operation is carried out.
9 GUARANTEE
The product is guaranteed for a period of 12 months from the purchase date. Complete information on
the guarantee is provided in the ARAG general catalogue and on our Website at the address
http://www.aragnet.it/GaranzieProdotti.htm
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