Richter GUT/F Series Overflow Valves Manual de usuario descargar pdf (Pagina 13)

Series GUT/F Page 13

9530-071-en Revision 10

TM 8361 Edition 10/2011

9.7 Tests

Following the assembly of the valve, the stroke and

the test pressure must be checked.

9.7.1 Stroke

Lift check:

The measurement can be made with a slide calliper

gauge and a depth indicator to DIN 862.

The lift is derived from the difference in the two

heights. It must be at least as high as the lift given in

the test certificate.

9.7.2 Test pressure

This test should take place on a test bench with a

neutral medium such 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 Supervi-

sory 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

105 cover flange

204 plug

205 seat

206 bellows

207 cap

307/1 guide bush

308 insert sleeve

400/1 O-ring

509/1 groove nut

537 lower spring plate

581 straining screw

800 valve stem

901/1 hex. screw

920/1 hex. nut

935/1 lead seal

936/x tooth lock washer

939/x spring-type pin

952/1 pressure spring

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 19 20

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Richter GUT/F Series Overflow Valves Manual de usuario Pagina 13

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