Richter NK/F series, Installation And Operating Manual

Page: 16 / 42

Series NK/F, NKP/F, NKS/F, NKSP/F, NKL/F, NKLP/F
Page 16
9520-070-en
Revision 10
TM 8361 Edition 10/2010
9.3.3 Proximity switch
The proximity switch reliably indicates the closed
position of the valve disc. The signal penetrates the
thick-walled lining.
9.4 Tests
Following tests would be done after the assembly.
Measurement of the breakaway torque
The breakaway torque required for opening and
closing the valve is to be ascertained. The maximum
torque should not exceed the values given in
Section
1.8 .
Tightness of valve opening and shaft bushing
The completed valves have to undergo a „leak test of
the closure with air“.
The tightness of the shaft bushing (stuffing box) of
each valve is tested. The holding time begins once the
residual air has escaped from the stuffing box
chamber.
Tightness is verified according to DIN EN 12266-1
respectively MSS SP-67.
For detailed installation and inspection regulations see
QM No. 0910-08-1005, available from Richter on
request.
10 Drawings
10.1 Legend
120 shell
221 disc/stem unit
229 guide pin
(up to. DN 150 / 6“ inclusive)
300 plain bearing
400/1 o-ring
405 thrust ring
409 body lining
412 pressure gasket
518 cup spring assembly
521 flexible inlay
532 grounding grope
901/x hex. screw
914/1 hex. socket screw
918/1 threaded rod
920/2 hex. nut (series NKL)
920/1 hex. nut
936/1 toothed lock washer
Lever assembly
235 lever assembly
517 scraper ring
519 throttling plate
901/2 hex. screw
920/1 hex. nut
Worm gear
857 warm gear
Actuator
510 bracket
517 scraper ring
804 coupling
850 actuator
980/2 round head grooved pin
Option safety stuffing box lever assemly
402/1 packing ring
413 sealing foil
503 spring gland follower
550 disc
901/3 hex. screw
Option safety stuffing box worm gear
402/1 packing ring
413 sealing foil
503 spring gland follower
510 lantern
550 disc
804 coupling
901/3 hex. screw
980/2 round head grooved pin
Option safety stuffing box actuator
402/1 packing ring
413 sealing foil
503 spring gland follower
550 disc
901/3 hex. screw
Option monitoring connection
407/1 seal ring
938/1 hex. head screw plug