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A resilient seated butterfly valve with superior design features and materials of construction to provide repeatable tight shutoff in severe abrasive and corrosive environments for a variety of applications.

Standard of Centerline Butterfly Valve

• Flange Standard.:DIN2501, BS10-D, BS4504, ANSI B16.1, B16.42, JIS B2239
• Valve Tested: API598
• Face to Face: DIN3202-K1, EN558-1 20 SERIES, BS5155, MSS SP-67

Material of Centerline Butterfly Valve

o	Parts Name	Material
1	Body	C.I. / D.I. / C.S. / S.S.
2	Disc	A536 60-40-18 / CF8 / CF8M / Br / AI-Br
3	Seat	NBR / EPDM / VITON / PTFE
4	Stem	SS410 / SS304 / SS216
5	Pin	SS304 / SS316
6	Bushing	PTFE / Bronze
7	O-Ring	NBR / EPDM / VITON
8	Key	Carbon Steel / SUS304 / SUS316

Design Features of Centerline Butterfly Valve

Corrosion Resistance

With Centerline Butterfly Valves only two parts of the valve come in contact with the medium. This means that neither the body nor mechanical parts such as the shaft are exposed to the corrosive environment.

The only two parts in contact with the medium are the body lining and the disc. These are available in a selection of materials so that a suitable corrosion-resistant combination can be chosen for most any application.

Bi-directional Shutoff

Centerline Butterfly Valves are liquid and gas-tight in both flow directions. The disc presses with uniform compression into the elastic cartridge seat over the entire circumference of the valve.

Replaceable Seat

The replaceable seat consists of a reinforced backup ring, on which the elastomer seat material is vulcanized. When mounting the valve between the pipe flanges this stable seat cannot be deformed or displaced. The cartridge design also prevents deformation when the valve is cycled, such as stretching and bulging of the elastomer in front of the moving disc.

The fixed connection between the elastomer and the backup ring allows the use of the valve in a full vacuum and high flow velocities. The slightly protruding sealing lip of the seat also serves as the flange seal.

Features of Centerline Butterfly Valve

• Suitable for both gaseous and liquid service
• Phenolic Backed Seat for superior sealing and long term use
• Single-piece stem design assures even torque distribution
• Positive shutoff bi-directionally
• Direct mount automation

Applications of Centerline Butterfly Valve

• HVAC
• Chemical/Petrochemical Processing
• Food and Beverage
• Power and Utilities
• Pulp and Paper