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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/§² | - | - | - | - | 150~400 | 150~800 | |
5 kg/§² | 50~200 | 150~1500 | 150~1500 | 200~1000 | - | - | |||
10 kg/§² | 50~200 | 150~1500 | 150~1500 | 200~1000 | - | - | |||
16 kg/§² | - | 150~1500 | 150~1500 | 200~1000 | - | - | |||
Usable Temperature | ¡Â70¡É | ¡Â80¡É | -253~+423¡É | 70¡É | |||||
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 | ¡Û | ¡Û | ¡Ý | ¡Û | ¡Û | ¡Û |
Sea water | ¡Û | ¡Û | ¡Ý | ¡Û | ¡Û | ¡Û |
Crude oil | ¡Ý | ¡Û | - | ¡Û | ¡Û | ¡Û |
Heavy oil | ¡Ý | ¡Û | - | ¡Û | ¡Û | ¡Û |
Light oil | - | ¡Ý | - | ¡Û | ¡Û | - |
Kerosenes | - | ¡Ý | - | ¡Û | ¡Û | - |
Naphtha | - | ¡Ý | - | ¡Û | ¡Û | - |
Gasoline | - | - | - | ¡Ý | ¡Û | - |
LPG | - | - | - | - | ¡Ý | - |
LNG | - | - | - | - | ¡Ý | - |
Air | ¡Û | ¡Û | ¡Û | ¡Û | ¡Û | ¡Û |
Steam | - | - | - | - | ¡Ý | - |
Gas | - | - | - | - | ¡Û | ¡Ý |
- 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.