Double Eccentric Design Offset Disc Wafer Type Butterfly Valve

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Double Eccentric Design Offset Disc Wafer Type Butterfly Valve Specification

Connection
Wafer Type - Fits Between Flanges as per EN, DIN, ANSI standards

Valve Type
Double Eccentric Design Offset Disc Wafer Type Butterfly Valve

Material
Body - Cast Iron / Ductile Iron / Carbon Steel / Stainless Steel, Disc - Stainless Steel / Duplex, Seat - PTFE / EPDM / Metal Seated

Power Source
Manual, Electric, Pneumatic

Pressure
PN10 / PN16 / PN25 / Class 150

Media
Water, Oil, Gas, Chemicals

Working Temperature
-29C to +200C (Depending on Seat & Material)

Port Size
DN50 to DN1200 (2 to 48)

Shape
Wafer

Application
Water Treatment, HVAC, Oil & Gas, Chemical & Process Industries, Power Plants

Corrosion Resistance
High, due to selected materials and coatings

Flow Characteristic
Bi-directional, Bubble-tight Shutoff

Testing Standard
API 598, EN 12266-1

Design Standard
API 609, EN 593

Operation
Lever, Gear, Pneumatic Actuator, Electric Actuator

Shaft Material
Stainless Steel AISI 410 / 431 / 316

End Connection Compatibility
EN 1092-1, ANSI B16.5, DIN, BS

Face to Face
ISO 5752 Series 20

Mounting
ISO 5211 Direct Mounting Pad

Leakage Class
Class VI (Soft Seated) / Class IV (Metal Seated)

Body Coating
Fusion Bonded Epoxy / Polyester Coating

Disc Seat Material
PTFE / EPDM / Metal

About Double Eccentric Design Offset Disc Wafer Type Butterfly Valve

Size Range: 2 inches to 48 inches, 65mm to 1200mm

Design Specification:

Design and Manufacturing: API 609 category "B" / MSS-SP - 68

Valve Face-to-Face Dimensions: API 609 Category "B" / ISO 5752 / MSS-SP -68

Flange Standard Conformity: ASME B 16.5 Class 150

: ASME B 16.47 Series "A" Class 150

Inspection And Testing: API 598

Pressure Temperature Rating: ASME B16.34

Top Flange Dimensions: Bolt Hole ISO 5211

Stem Dimensions: Square Drive to ISO 5211

Leakage Class: Class VI as par ANSI B 16, 16.104

Exceptional Durability and Corrosion Resistance

Built with premium materials such as stainless steel, duplex steel, and cast iron, the valve is highly resistant to corrosion. The fusion bonded epoxy or polyester coatings provide an extra layer of protection, making it ideal for harsh industrial environments and increasing the valve's operational lifespan even in challenging conditions.

Versatile Actuation Options for Flexible Operation

This butterfly valve supports multiple operation methods, including lever, gear, pneumatic actuator, and electric actuator. The ISO 5211 direct mounting pad enables easy integration with various automation systems, ensuring efficient and customized valve control tailored to specific process requirements.

Compliant with International Standards for Quality Assurance

Designed and manufactured according to API 609, EN 593, API 598, and EN 12266-1, the valve guarantees superior quality, reliable performance, and adherence to industry norms. Its testing and face-to-face dimensions comply with ISO 5752 Series 20, ensuring straightforward replacement and compatibility with global piping standards.

FAQ's of Double Eccentric Design Offset Disc Wafer Type Butterfly Valve:

Q: How does the double eccentric offset disc design benefit valve performance?

A: The double eccentric offset disc design significantly reduces friction between the disc and seat during operation, minimizing wear and ensuring a longer service life. This design enables bubble-tight shutoff, maintaining reliable and leak-free sealing over repeated cycles.

Q: What are the available actuation methods for this butterfly valve?

A: This valve can be operated manually using a lever or gear, or automatically through pneumatic and electric actuators. The ISO 5211 direct mounting pad allows for easy installation of actuators to suit your control and automation needs within various process applications.

Q: When should you select PTFE, EPDM, or metal seat material for this valve?

A: PTFE seats are best for chemical resistance and high temperatures, EPDM is ideal for water and general non-oily fluids, and metal seats are suited for high-pressure or abrasive services. The choice depends on your media compatibility, operating conditions, and leakage class requirements.

Q: Where can this valve be used and what applications does it serve?

A: This butterfly valve is widely used in water treatment plants, HVAC systems, oil & gas pipelines, chemical and process industries, and power generation facilities across India and globally. Its versatile design accommodates diverse media like water, oil, gas, and chemicals.

Q: What is the process for installation and connection of this wafer type valve?

A: Installation involves placing the wafer valve between flanges following EN, DIN, or ANSI standards, with a port size from DN50 to DN1200 (2" to 48"). The face-to-face dimension conforms to ISO 5752 Series 20, allowing straightforward fitting and reliable sealing between pipeline sections.

Q: What are the key benefits of using this valve in corrosive media?

A: The valve's body and disc are made from corrosion-resistant materials, and coatings like fusion bonded epoxy or polyester further enhance durability. This construction ensures performance and reliability when used with aggressive fluids, minimizing maintenance and replacement frequency.

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