Japan, Nippon Daiya Valve
Nippon Daiya Valve C201R Type Cast Iron Butterfly Valves
Made in Japan
Manufacturer: Nippon Daiya Valve
Model: C201R type
Cast iron butterfly valves(C201R type)
①Long Life with double off-center Mechanism
Same as KM200 type, the drive shaft of the disc is double eccentric (double off-center). The disc and the seat do not contact until just before they are fully closed, so the seat has a long service life with little wear.
②High sealing performance by centripetal self-sealing
The sealing surface of the disc has a spherical surface centered around the point “O” of the figure and the seat has a clearance of the “C” on its outside. Therefore, the valve is fully closed and a uniform contact with sealing surface is obtained by simply placing the seat. In addition, the seat has a self-sealing mechanism that generates surface pressure on the seal surface of the disc by the fluid pressure, enabling a good seal from vacuum to high pressure.
③Easy maintenance
The seat can be easily replaced simply by removing the seat cover.
Applicable field
Chemicals, Environment and Water Treatment, Steel, Ships, Power Stations, Air Volume Control, etc.
Standard Specifications
| Component | Specification |
|---|---|
| Valve Type | C201R |
| Body | FC200 |
| Disc | FCD450 + Nickel-plating |
| Stem | SUS420J2 |
| Seat | ・AB(NBR) – Synthetic rubber seat ・EP(EPDM) – Synthetic rubber seat TF(PTFE+EPDM) – Fluorocarbon resin seat |
| Gland Packing | NBR, EPDM, FKM |
| Connection | Wafer JIS5K, 10K |
