Concentric Flanged Butterfly Valve – Müller

Mô tả

A concentric flanged butterfly valve is used for flow control and on/off service, featuring a disc that rotates 90° and is centrally positioned within the valve body. The valve is connected by flanges in accordance with PN10/PN16/ANSI standards, ensuring secure installation and good pressure resistance.
This type of valve offers high sealing performance and smooth operation, making it suitable for potable water, wastewater, HVAC systems, fire protection, and industrial applications.
Construction:
– Valve body: Grey cast iron, ductile iron, carbon steel, stainless steel
– Disc: Ductile iron, stainless steel
– Shaft: Stainless steel 304 / 316
– Seat/Gasket: EPDM, NBR, Viton
– Top cover and neck
– Actuation: Lever, handwheel with gearbox, electric / pneumatic actuator
Concentric design: The shaft and disc are aligned on the same centerline, ensuring smooth operation and lower cost compared to eccentric designs.
Technical specifications:
– Size range: DN50 – DN350
– Working pressure: PN10 / PN16 (depending on material)
– Operating temperature: -10°C to 120°C (EPDM) / up to 180°C (Viton)
– Connection: Flanged, PN10 / PN16 / ANSI 150
– Control options: Lever, gear-operated handwheel, electric actuator, pneumatic actuator
– Service media: Potable water, wastewater, air, light oil, mild chemicals
Key Characteristics:
– Concentric design provides low operating torque during operation
– The seat is integrally molded or press-fitted into the body, ensuring superior sealing performance
– Quick open/close (90°), easy to operate
– Long service life and durable in mildly corrosive environments
– Flanged connection provides secure installation, suitable for large-diameter pipelines
– Can be equipped with electric or pneumatic actuators for automation
Benefits:
– Cost-effective
– Safe flanged connection with high rigidity
– Smooth operation and easy maintenance
– Good actuator compatibility
Disadvantages:
– Not recommended for pressures above PN25
– Not 100% leak-tight when used for throttling at small opening angles