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Series NKS-N, NKSP-N 

 

 

Page 

12

 

 
 

9520-021-en 

Revision 17 

TM 10477

 

Edition    05/2022

 

Operation 

7.1  Initial commissioning 

Normally,  the  valves  have  been  tested  for  leaks  with 
air  or  water.  Prior  to  initial  operation  check  cover 
screws. For tightening torques, see 

Section 1.2

 

 

Unless  otherwise  agreed  there  could  be 
residual amounts of water in the flow section 
of  the  valve.  This  could  result  in  a  possible 
reaction with the medium. 

To  prevent  leaks,  all  connection  screws  should  be 
retightened  after  the  initial  loading  of  the  valve  with 
operating pressure and operating temperature.  
For tightening torques, see 

Section 1.2

 
 

7.2  Improper operation and their 

consequences 

  Do  not  operate  the  butterfly  valve  without  valve 

actuation. Otherwise the disc will be uncontrollably 
set in motion by the medium flow. 

  Butterfly valves with a hand lever should never  be 

abruptly  opened  or  closed.  This  can  lead  to  water 
hammer effects. 

  Dissipate  thermal  expansion  volumes  in  shut-off 

pipes. 

  If  the  plastic  swells  up  due  to  the  effect  of  the 

medium,  this  can  result  in  the  functional  parts 
jamming.  

  Operation with solids leads to increased wear. 

  Operation  during  cavitation  leads  to  increased 

wear. 

  Non-observance  of  the  pressure-temperature 

diagram can lead to damage. 

  There  must  be  no  foreign  matter  on  the  sealing 

surfaces. 

  Do not remove the seals on the body screws 

914/1

 

without observing 

Section 8.1.1

Risk of injury!

 

 

7.3  Shutdown  

Before loosening the flange bolts: 

  ensure plant to be free of pressure 

  flush out medium 

  observe safety regulations 

 

Prior to starting any repair work, the valve is 
to  be  thoroughly  cleaned.  Medium  residue 
may  be  in  the  valve  even  if  it  has  been 
properly drained and flushed.  

After  dismantling  immediately  protect  the  valve 
against mechanical damage. 
 
 

7.3.1  Additional advice for shut-off and 

control butterfly valve with actuator 

 

 

Ensure that a remotely actuated quarter-turn 
actuator cannot be accidentally switched on. 

 

Prior  to  dismantling,  install  support 

507

,  join  using 

existing hex. screw 

901/1

See  installation  instructions  in 

Section  5.2.1

  and  the 

drawing in 

Section 4.4

 
 
 

Malfunctions 

  Flange connection ball valve/pipe is leaking 

Retighten  the  flange  screws  to a  tightening  torque 
according  to 

Section  1.2

.  If  this  does  not  remedy 

the  leak,  the  recommended  torques  may  be 
exceeded by 10%.  
If  this  also  fails  to  stop  the  leak,  dismantle  and 
inspect the ball valve. 

Dismount valve and repair.  

  Stem passage leaking 

Dismount valve and repair. 

  Medium leaking at the partition between lower and 

upper halves 

Dismount valve and repair, probably the stem seal 
is not tight. 

  Valve does not switch  

Has the locking plate been dismounted?  
See 

Section 5.2.1

.

 

Is the actuator supplied with power? 

Has  a  directional  control  valve  been  correctly 
connected? 

Is there foreign matter in the valve? 

  The bore of the valve is leaking 

Wear at the valve actuation ? 

Do limit stops have to be adjusted? 

Is the shaft deformed? 

Deformation,  damage  or  wear  to  body  lining  or 
disc? 

 

Содержание NKS-N Series

Страница 1: ...rved before transport installation operation and maintenance Subject to change without notice Reproduction is generally permitted with indication of the source Richter Chemie Technik GmbH 9520 021 en...

Страница 2: ...itial commissioning 12 7 2 Improper operation and their consequences 12 7 3 Shutdown 12 7 3 1 Additional advice for shut off and control butterfly valve with actuator 12 8 Malfunctions 12 9 Maintenanc...

Страница 3: ...7043 DIN 1693 body lining PTFE Disc CD 4MCU PFA metal coated Temperature range 60 C to 200 C 75 F to 400 F accord to operating pressure See pressure temperature diagram in Section 1 6 Operating pressu...

Страница 4: ...ipe screws flanges to ASME Class 150 or flanges ISO DIN drilled to ASME Class 150 Flange Nominal size screws Tightening torque mm inch ASME Nm in lbs 50 2 4 x 30 266 80 3 8 x 5 8 25 221 100 4 8 x 5 8...

Страница 5: ...nnections for worm gears and brackets as per DIN ISO 5211 The inside diameter of the mounted pipe flanges must always be greater than the dimension E in the table For more dimensions see drawings in S...

Страница 6: ...he country in question must be observed 2014 68 EU PED AD2000 DIN EN 16668 ASME B16 42 DIN EN ISO 15848 1 certificate valid from 29 C to 200 C 1 8 Actuating torques Nominal size Mderf Mdmax mm inch Nm...

Страница 7: ...ch are FDA compliant can be used for food and pharma ceutical feedstock as well as in biochemistry Powdered and granulated non or low abrasive solids Shut off and control butterfly valves with a plast...

Страница 8: ...valve However these discharges inside the valve cannot cause ignitions if the valve is completely filled with medium If the valve is not completely filled with medium e g during evacuation and fillin...

Страница 9: ...ove them until just before installa tion They protect the plastic surfaces against dirt and mechanical damage Handle the goods being transported with care During transport the valve must be protected...

Страница 10: ...t sufficient Risk of personal injury or damage to the environment due to the medium Wear protective clothing when work is performed on the valve Prior to the disposal of the valve Collect any medium e...

Страница 11: ...se and hand tight By means of a test actuation ensure that the disc is able to freely rotate With the disc slightly opened tighten the piping bolts crosswise For tightening torques see Sec tion 1 2 Bu...

Страница 12: ...8 1 1 Risk of injury 7 3 Shutdown Before loosening the flange bolts ensure plant to be free of pressure flush out medium observe safety regulations Prior to starting any repair work the valve is to be...

Страница 13: ...is screw with a completely screwed longer dismantling screw not in the product range For the required minimum length of the dismantling screw see table in Section 1 7 Remove the opposite body screw 91...

Страница 14: ...3 O rings 400 1 400 2 400 3 400 4 thrust ring 405 1 405 2 pre tensioned by the Pressure springs 952 1 952 2 Packing ring 402 1 Discs 550 1 550 2 550 3 550 6 550 4 550 5 not in DN 50 100 Ring 500 Top s...

Страница 15: ...ts are available as accessories in the Richter range of products 9 4 4 Required breakaway torque The breakaway torque of the actuator must be at least as high as the breakaway torque of the butterfly...

Страница 16: ...ining 412 x pressure gasket 418 top sleeve not DN 50 2 419 x pressure sleeve not to DN 50 2 500 ring not DN 50 2 501 ring 2 piece 507 Retaining plate see drawing in Section 4 4 510 bracket 519 throttl...

Страница 17: ...Series NKS N NKSP N Page 17 9520 021 en Revision 17 TM 10477 Edition 05 2022 10 3 Sectional drawing NKS N with lever assembly DN 50 100...

Страница 18: ...Series NKS N NKSP N Page 18 9520 021 en Revision 17 TM 10477 Edition 05 2022 10 4 Sectional drawing NKS N with lever assembly DN 150 350...

Страница 19: ...t worm gear and actuator For the connecting dimensions of the worm gear and actuator see Sections 9 6 and 9 7 DN H h l B L D C E 50 135 40 300 72 43 135 90 28 80 160 40 300 100 46 178 128 67 100 175 4...

Страница 20: ...0 250 250 250 r 181 181 181 181 181 206 206 226 s 62 62 62 62 62 89 89 92 t 102 102 102 125 125 174 174 214 all dimensions in mm 10 7 Connecting dimensions actuator DN 50 80 100 150 200 250 300 350 g...

Страница 21: ......

Страница 22: ......

Страница 23: ...zung f r die G ltigkeit der Herstellererkl rung ist das Beachten und Einhalten der Betriebsanleitung meet the requirement of the leakage rate La 5 10 4 mgls m according to clause 5 2 6 4 of German Cle...

Страница 24: ...ls The laws are such as the Health and Safety at Work Act ArbSt ttV the Ordinance on Harzadous Substances GefStoffV BIOSTOFFV the procedures for the prevention of accidents as well as regulations to e...

Страница 25: ...tamination of the pumps valves and component sent in for repair On the basis of this information for the contractor is it possible to meet the necessary preventive action during the execution of the r...

Страница 26: ...ch cleaning method radioactive3 1 if no then forward to D other pollutant 2 Aggregates which are contaminated with microbiological or explosive substances are only accepted with documented evidence of...

Страница 27: ...ai Info idexcorp com Internet www richter ct com Richter Pumps Valves Inc 406 State Street Cedar Falls 50613 IA USA Tel 1 319 268 8038 Fax 1 319 273 8157 Email RichterCedarFalls Info idexcorp com Inte...

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