Richter GUT/F Series Overflow Valves - Manual (Page 9)

Series GUT/F
Page 9
9530-071-en Revision 10
TM 8361 Edition 10/2011
6.2.3 Discharge conditions and reaction
forces
At low temperatures:
Outlet lines must be protected against
freezing. This applies in particular if gas
cooling as a result of expansion is to be
expected or lines are laid outdoors.
With crystallising media:
In the case of media which tend to
crystallise, solidify or stick, appropriate
action must be taken to ensure that the
solidification process cannot take place in the inlet or
outlet lines or in the body (e.g. installed rupture disc,
insulation, heating).
With gassing media:
In the case of gassing or vaporising liquids,
adequately dimensioned flashtraps must be
located in the direct vicinity of the valve.
6.3 Valve connecting dimensions
The main dimensions are contained in the
dimensional drawing in Section 10.3.
6.4 Flange caps and gaskets
Contamination of or damage to the sealing
surfaces is best avoided if the protective caps
remain on the flanges until just before installation.
We recommend the installation of gaskets so that the
sealing surfaces are not damaged by the mating
flanges.
If plastic sealing surfaces, e.g. on mating flanges
made of metal or enamel, can be damaged, use
PTFE-lined seals with a metal inlay.
These gaskets are available as special accessories in
the Richter range.
6.5 Direction of flow and
installation position
The direction of flow must be observed
when installing the valve. It is indicated by a
direction arrow on the valve body.
A mix-up of the inlet and outlet will result in the
valve becoming ineffective and the bellows may be
destroyed.
Any fitting position can be chosen.
Fig. 5
6.6 Grounding
The valve must be grounded. The simplest solution is
to use tooth lock washers which are placed under one
pipe bolt of each flange..
At the customer's request a setscrew M6 with a hex.
nut and washer will be provided at each flange as an
additional grounding connection.
Otherwise grounding must be ensured by different
measures e.g. a cable link.
6.7 Installation
The plant components to be protected are to be
cleaned thoroughly prior to installation of the valve.
Solids jeopardise the soft-sealing, high-precision
surfaces of the seat and plug and permanent leaks
could arise.
The overflow valve must be installed so that no
inadmissible mechanical or thermal stresses are
transmitted from the attached pipes to the body.
Changes in length of the pipes due to temperature
are to be allowed for, e.g. through the installation
of expansion joints.
Remove the flange covers.