버터플라이 밸브

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Standard construction of butterfly valves

(Please state TYPE NO. on your enquiry or order, chosen from the following table.)

Name of valve Rubber seated butterfly valve Metal seated butterfly valve PTFE - Rubber seated butterfly valve
TYPE NO. Operating system Manual operation Wrench CBT-1218 - - - CTR-51 -
Handwheel - CBT-1200 CDR-59 CDM-11 - CTR-52
Pneumatic operation Pneumatic cylinder - ACBT-3294 ACDR-35 ACDM-61 - ACTR-53
Pneumatic motor driven - NCBT-3271 NCDR-42 NCDM-41 - NCTR-54
Twin-powern operator - WCBT-3281 WCDR-44 WCDM-43 - WCRT-55
Hydraulic operation Hydro cylinder - PCBT-3200 PCDR-45 PCDM-38 - PCTR-56
Hydro motor driven - HCBT-3261 HCDR-47 HCDM-46 - HCTR-57
Electric operation Elect. motor driven - MCBT-2200 MCDR-49 MCDM-48 - MCTR-58
Producible bore(mm) Working pressure 1 kg/㎠ - - - - 150~400 150~800
5 kg/㎠ 50~200 150~1500 150~1500 200~1000 - -
10 kg/㎠ 50~200 150~1500 150~1500 200~1000 - -
16 kg/㎠ - 150~1500 150~1500 200~1000 - -
Usable Temperature ≤70℃ ≤80℃ -253~+423℃ 70℃
Material of seat ring(Application range shows on another table) NBR CR NBR TNBR CR FPM Metal(Stellite) PTFE NBR
Construction of valve stem - Duble eccentric mechanism

  • Synthetic rubber seated butterfly valves are also producible with lining in the valve body.
  • A bove table shows producible valves as Nakakita's standard. We can also arrange and produce the butterfly vales for any partichlar service.

APPLICATION RANGE OF MATERIAL FOR SEAT RING

  NBR TNBR CR FPM Metal(Stellite) PTFE NBR
Fresh water ○ ○ ◎ ○ ○ ○
Sea water ○ ○ ◎ ○ ○ ○
Crude oil ◎ ○ - ○ ○ ○
Heavy oil ◎ ○ - ○ ○ ○
Light oil - ◎ - ○ ○ -
Kerosenes - ◎ - ○ ○ -
Naphtha - ◎ - ○ ○ -
Gasoline - - - ◎ ○ -
LPG - - - - ◎ -
LNG - - - - ◎ -
Air ○ ○ ○ ○ ○ ○
Steam - - - - ◎ -
Gas - - - - ○ ◎

  • NBR : Nitrile butadiene rebber
  • TNBR : Notrole butadiene rubber (Improved type)
  • CR : Chloroprene rubber
  • FPM : Fluoro propyelene monomer (Fluoric ruubber)
  • PRFE : Poly-tetra fluoride ethylene
  • The fluids other than above mentioned, Please inquire us for confirmation.