Richter GU/F Series, Installation And Operating Manual

Page: 11 / 28

Series GU/F
Page
11
9530-020-en Revision 15
TM 10477 Edition 05/2022
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.
♦
Always install the overflow valve with the stem in a
vertical position.
Fig. 4
6.6 Grounding
The valve must be grounded. This can be achieved in
the simplest way via the pipe screws using tooth lock
washers. One pipe screw per flange is underlaid with
toothed disks.
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 valve will leak.
♦
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.
♦ Before installation (vales with set pressures ≤ 0.5
bar), remove metallic transport securing strip and
cap nut for securing the valve during transport.
Screw on attached lead-sealed cap nut
927/1 . See
Section 5.1 .
6.8 Gas-tight design (Option)
An O-ring 400/4 seals the lifting lever 238 .
The plug 982/1 is replaced by a hex. head screw plug
938/2 .
Legend see Section 10.1 Fig. 5