Cast iron butterfly valve (C201R type)

High sealing performance by centripetal self-sealing.

The seat is a long service life.


Lever operated valve CL201R type	Pneumatically operated ON-OFF valve (double acting) CPN1200R type	Pneumatically operated ON-OFF valve (reverse acting) CPO1200R 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

Valve type	C201R
Body	FC200
Disc	FCD450 + Nickel-plating
Stem	SUS420J2
Seat	・Synthetic rubber seat: AB(NBR), EP(EPDM) ・Fluorocarbon resin seat: TF(PTFE+EPDM) ・CF (reinforced PTFE+EPDM containing carbon fiber) ・CM (reinforced PTFE+SUS304 containing carbon fiber)
Gland packing	NBR、EPDM、FKM
Connection	Wafer JIS5K, 10K