Richter GU/F Series Overflow Valves - Manual (Page 11)

Series GU/F
Page 11
9530-070-en Revision 00
TM 6908 Edition 10/2007
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.
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.
Fig. 5
Legend see Section 10.1
6.9 Signal transmitter (Option)
On request, an signal transmitter is available for
remote monitoring.
Glue in stem extension 805 (e.g. Loctite 638) and
secure with a hex. nut 920/4.
The support, lower part, 542 is screwed on instead
of the cap nut 927/1.
Insert the O-ring 400/3.
Mount support, upper part, 541.
Screw in signal transmitter 859; after adjustment,
counter with hex. nut.
Secure support, upper part, with setscrew 904/1.
DN 25/50, 50/80, 80/100
Fig. 8
Legend see Section 10.1