Single part butterfly valve centrally pivoted and flowfriendly dimensioned. Sealed closure in both flow directions with exchangeable seal vulcanised onto a carrier ring. The butterfly valve is pneumatically driven and available in double or single acting construction. On customer request the butterfly valve will be configured with spring loaded open or closed default position. The butterfly valve is designed for flange clamping according to DIN 2501. The pneumatic control of the actuator is selectable realised with either a direct mounted or separate 5/2– as well as 3/2-way-valve, both being capable to be electrically, pneumatically or manually activated.


The butterfly valve is suited for flow media such as neutral gases and fluids with a viscosity up to 120 mm²/s. Please note that media whichlead to an increase of the operation torque may require higher actuator force classification. With respect to aggressive media please refer to our material resistance table ZXWBT343.






Technical Data

Nominal width
Mounting position   
Nominal-/Operating pressure
Overall Length
Operating Temperature Range
Valve materials  
Flow direction 
Flow media
Pneumatic control  
DN 40 to DN 600
DN 40 to DN 300 max. PN16
DN 350 to DN 600 max. PN10
According to DIN EN 558-1 Series 20 (K1)
with seat EDPM = -30° C to +120° C
with seat NBR = -20° C to +80° C
GGG40 (JS1030)
EDPM, vulcanised onto carrier ring, exchangeable
Stainless steel 1.4408 (CF8M)
Stainless steel 1.4021 (AISI420), one-piece
neutral gases and liquids; viscosity up to 120 mm²/s
choice of 5/2– as well as 3/2-way valves either directly 
mounted or separate both available with electrical,
pneumatic or manual operation