Operation
Butterfly valve 411 is an on-off and control valve for demanding industrial pipelines. The valve is tight to both directions of flow.

Nominal pressure
PN 25

Closing pressure difference CS
20 bar DN 80 - 350
16 bar DN 400 - 600

Closing pressure difference TS
25 bar DN 80 - 350
16 bar DN 400 - 600

Temperature and tightness class
AISI 316 max +260 °C/ min -40 °C ISO5208, EN 12266-1 RATE B
PTFE+C max +180 °C/ min -40 °C ISO5208, EN 12266-1 RATE A

The max pressure difference depends on the working temperature.

Design
The body of this wafer type butterfly valve is made of stainless steel. The double eccentric disc and stem are of stainless steel as well. Stem seals are tightable graphite seals and O-rings.
The butterfly valve is delivered with bare shaft, handlever, manual gear, electric, pneumatic or hydraulic actuator according to customer’s needs.

Face to face lenghts
According to ISO 5752, EN 558-1 series 20, DIN 3202 K1.

Connection: Between flanges SFS 2123 = DIN 2501 PN 25, PN 16, PN 10 ANSI CLASS150

Nominal sizes
DN 80 - 600

Product code
411CS _ _ _ metal seated
41102TS _ _ _ teflon seated

411.. _ _ _ with handlever
411.. _ _ _Z with bare shaft
411.. _ _ _M with manual gear

Special order for steam
41101CS_ _ _ FIRE SAFE accepted

Conform with the requirements of the Council Directive 97/23/EC on Pressure Equipement, marking:
Class: Gas, group 1

411_uk.pdf (207.0 kb)