5
EN
3.2 - INSTALLATION
(see example in 3.4)
Threaded devices:
• Assemble the device by screwing it, with the due seals, onto the plant with pipes and/or fittings whose threads are consistent
with the connection being attached.
• Do not use the neck of the top cover (
4
) as a lever to help you screw it on, only use the specific tool;
• The arrow, shown on the body (
11
) of the device, needs to be pointing towards the application;
Flanged devices:
• Assemble the device by flanging it, with the due seals, onto the plant with pipes whose flanges are consistent with the
connection being attached. The gaskets must be free from defects and must be centred between the flanges;
• If, after installing the gaskets, there is still an excessive space in between, do not try to reduce the said gap by excessively
tightening the bolts of the device;
• The arrow, shown on the body (
11
) of the device, needs to be pointing towards the application;
• Insert the relative washers inside the bolts in order to prevent damage to the flanges during tightening;
• When tightening, be careful not to “pinch” or damage the gasket;
• Tighten the nuts or bolts gradually, in a “cross” pattern (see the example below);
• Tighten them, first by 30%, then by 60% and finally 100% of the maximum torque (see the table below according to
EN 13611);
Diameter
DN 65 DN 80 DN 100
Max. torque (N.m)
50
50
80
• Tighten each nut and bolt again clockwise at least once, until the maximum torque has been achieved uniformly;
• Common procedures (threaded and flanged devices):
• The regulator is normally positioned before the utility. Primarily evaluate the possibility of installing the regulator as shown in
the installation example in 3.4, namely in an optimal position pos.
a
(see figures below);
• Should this not be possible, the following factors must be considered:
1. if installed as shown in pos.
b
the maximum P2 value declared on the rating plate could be less by a few mbar.
2. if installed as shown in pos.
c
the life span of the product could be shorter than the duration that could be obtained
if installed in the optimal position
a
;
3. if installed as shown in pos.
d
, besides that indicated for pos.
c
it is recommended to install a filter after the
regulator that protects it from debris that could enter from downstream from above (due to gravity);
a
b
d
c
• During installation, avoid debris or metal residues from getting into the device;
• To guarantee mechanical tension-free assembly, we recommend using compensating joints, which also adjust to the pipe’s
thermal expansion;
• If the device is to be installed in a ramp, it is the installer’s responsibility to provide suitable supports or correctly sized
supports, to properly hold and secure the assembly. Never, for any reason whatsoever, leave the weight of the ramp only on
the connections (threaded or flanged) of the individual devices;
• In any case, after the installation check the tightness of the system, avoiding to subject the membrane of the regulator
(therefore, the downstream pipe section) to a pressure higher than 300 mbar;
