Richter GU/F Series, Installation And Operating Manual

Page: 17 / 28

Series GU/F
Page
17
9530-020-en Revision 15
TM 10477 Edition 05/2022
9.7.2 Test pressure
This test should take place on a test bench
with a neutral medium such as air or water.
Regarding their suitability and precision, the
pressure gauges must conform to the
requirements of current national regulations
(in Germany: e.g. VdTÜV data sheet "Safety
Valve 100" of the Association of the German
Technical Supervisory Boards).
♦
All pressure tests should be carried out in
compliance with DIN EN 12266-1 or API 527.
♦
It is recommended to perform a bubble test with a
5 mm diameter hose positioned 5 mm below the
surface of water. The other end of the hose is
sealed to the outlet of the valve by means of a
stopper.
♦
To check the test pressure, the pressure in the
valve inlet is slowly increased until the valve com-
mences to open.
♦
To check the reseating pressure, the pressure in
the valve inlet is slowly decreased until the valve is
bubble-tight.
10 Drawings
10.1 Legend
100 Body
117 thrust flange
124 pressure ring
204 plug
205 seat
206 bellows
237 lifting aid
238 lifting lever
305 bearing guide
306 stem guide
307/1 guide bush
308 insert sleeve
395 axial-needle roller cage
396 axial-washer
400/1 O-Ring
420 thrust ring, two pieces
513 spring bonnet
534 stem nut
535 lifting cap
536 upper spring plate
537 lower spring plate
538 adjusting screw
539 locking plate
549 centering ring
554/2 washer
555 centering nut
561/1 grooved pin
802 spindle
900/1 ring bolt
901/x hex. screw
902/x stud screw
914/1 hex. socket screw
920/x hex. nut
920/3 hex. nut, plain
927/1 cap nut
929/1 prevailing torque type hex. nut
932/x snap ring
934/1 lock washer
935/x lead seal
936/x tooth lock washer
938/1 hex. head screw plug
939/x spring-type pin
952/1 pressure spring
Option gas-tight design
238 lifting lever
400/4 O-Ring
938/2 hex. head screw plug
Option signal transmitter
540 support, signal transmitter
includes:
400/3 O-Ring
541 support. upper part
542 support, lower part
904/1 setscrew
939/2
Spring-type pin
805 stem extension
859 signal transmitter
920/4 hex. nut