NIHON KOSO CO.
Nihon Koso Butterfly Valves Disc Damper
Manufacturer: NIHON KOSO CO., LTD.
Features
- Metal seal ring with a cut-end is set around the disc.
- This construction realizes low seating force and better shut off performance.
- It also provides more resistance against very high operating temperature.
- The seat ring’s thermal expansion with fluid temperature fluctuation makes the valve best suited to high-temperature fluid service.
Specifications
| Body type | 600B | 600S | 610S | |
|---|---|---|---|---|
| Body size | 3″(80A) to 60″(1500A) | 3″(80A) to 128″(3200A) | 6″(150A) to 36″(900A) | |
| Body rating | ANSI Class 150 to 900, JIS 5K to 63K | ANSI Class 125, JIS 2K to 10K | ANSI Class 125, JIS 2K to 10K | |
| Fluid temperature | -45 to +600° | -45 to +750° | ||
| Connections | Wafer type | Flanged (RF) | ||
| Body materials | SCPH2/WCB, SCS13A/CF8, SCS14A/CF8M. etc. | SS400, SUS304, SUS316. etc. | SUS304, SUS316 etc. | |
| Disc materials | SCS14A/CF8M | |||
| Rangeability | 60° Opening/15:1 90° Opening/30:1 | 100:1 to 150:1 | ||
| Flow characteristics | Approximate Eq% (Inherent Characteristics) | |||
| Seal ring materials | – | – | SUS316 or Inconel | |
| Seat Leakage | Standard | 90°Cv × 2.5 to 0.5% | 90° Cv × 5.0 to 1.5% | 90°Cv × 2.5 to 0.1% |
| 15° seal | – | 90° Cv × 0.5 to 0.2% | – | |
| Back seat | – | 90° Cv × 2.0 to 1.0% | – | |
| Actuator combination | 6300RB, 6500RA, 7300RA: Pneumatic Cylinder Actuator 3500RB, 3600RB: Solid State Electronic Actuator 5200TA: Pneumatic Diaphragm Actuator | |||
