8 inch Butterfly Valves

The 8” Butterfly Valve (DN200) is a popular choice for medium-to-large pipeline systems requiring efficient flow isolation and throttling. With a compact face-to-face dimension and lightweight design compared to traditional gate or globe valves, it offers excellent performance while reducing space and installation costs.Ideal for use in water treatment, HVAC, fire protection, marine, chemical, and industrial processing, the 8" butterfly valve is compatible with a wide range of media including water, air, steam, and various chemicals. Available in wafer, lugged, or double flanged configurations, this size ensures high flow capacity with low pressure drop thanks to its streamlined disc design.

Key Features

Key features and benefits.
1

Key Features

The 8" butterfly valve allows large volumes of fluid to pass through with minimal resistance thanks to its streamlined disc design. This ensures efficient operation and reduced energy consumption in high-flow systems.
2

Key Features

Compatible with flange standards such as PN10, PN16, ANSI 150, and JIS, the 8" valve can be installed in a wide range of global systems. Its wafer, lugged, or double flanged body options offer flexibility for both new and retrofit applications.
3

Key Features

Equipped with a standard ISO 5211 mounting pad, the valve is ready for integration with electric or pneumatic actuators. This makes it ideal for automated systems requiring reliable on/off or modulating control.

Ductile Iron Butterfly Valves

The 8” valve is compatible with multiple flange standards including ANSI 150, PN10, PN16, and JIS, allowing for seamless integration into global piping systems. Certification options include EN 10204 3.1 material certificates, pressure testing, and third-party witness testing, with custom documentation available upon request.

Backed by available spares and actuation options, the 8" Ductile Iron Butterfly Valve offers a cost-effective, heavy-duty flow control solution built to perform in both indoor plant and external environments.

Size Range: DN32-DN1600 (1 1/4"-64")
Body Materials: GJS500-7 Ductile Iron Rilsan Coated
Disc Materials: CF8M Stainless Steel
Seat Materials: EPDM, NBR Buna, Hypalon, Viton, Silicone, High Temperature, Polyisoprene, Epichloridine
Actuated Function: Lever Operated, Hand Wheel / Gear Box Operated, Extended / Extension Chain Wheel
Applications: Potable/Waste Water, Cooling Systems, Oil, Gases, Air
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Carbon Steel Butterfly Valves

Equipped with a CF8M stainless steel disc and a 304 stainless steel shaft, the valve ensures long-term operational reliability. Its concentric one-piece body design includes four flange-mounting holes for easy alignment and secure installation between ANSI 150, PN10, PN16, or JIS flanges. The replaceable elastomer seat provides excellent sealing performance for both on/off isolation and flow throttling duties.

Designed for ease of maintenance and automation, this 8" carbon steel valve can be supplied with manual levers, gear operators, or actuation packages, and is backed by a full range of certification options including EN 10204 3.1, pressure testing, and third-party witness testing.

Size Range: DN32-DN1600 (1 1/4"-64")
Body Materials: WCB Carbon Steel
Disc Materials: CF8M Stainless Steel
Seat Materials: EPDM, NBR Buna, Hypalon, Viton, Silicone, High Temperature, Polyisoprene, Epichloridine
Actuated Function: Lever Operated, Hand Wheel / Gear Box Operated, Extended / Extension Chain Wheel
Applications: Potable/Waste Water, Cooling Systems, Oil, Gases, Air
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Stainless Steel Butterfly Valves

The 8" 40W4040 Stainless Steel Butterfly Valve is engineered for demanding flow control applications where corrosion resistance, hygiene, and durability are key. Built with a robust stainless steel body and a concentric replaceable seat, this valve is ideal for both on/off isolation and throttling duties in tough environments.

Its design ensures a tight, bubble-free seal with bidirectional capability, thanks to the precision-fit disc and seat alignment. The stainless steel construction makes it highly suitable for industries such as food & beverage, chemical processing, water treatment, and marine applications, where aggressive media or sanitary requirements are present.

Size Range: DN32-DN1600 (1 1/4"-64")
Body Materials: CF8M 316 Stainless Steel
Disc Materials: CF8M 316 Stainless Steel
Seat Materials: EPDM, NBR Buna, Hypalon, Viton, Silicone, High Temperature, Polyisoprene, Epichloridine
Actuated Function: Lever Operated, Hand Wheel / Gear Box Operated, Extended / Extension Chain Wheel
Applications: Potable/Waste/Sea Water, Cooling Systems, Oil, Gases, Air, Corrosive, Chemical
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PTFE Lined Butterfly Valves

Lined entirely with high-purity PTFE, this valve provides exceptional chemical resistance, complete media isolation, and zero risk of cross-contamination, making it ideal for use in corrosive processing, pharmaceutical production, and fine chemical handling. The concentric sealing system delivers tight, bidirectional shutoff, suitable for both on/off and throttling operations.

Compatible with ANSI 150, PN10, PN16, and JIS flange standards, the 8” PTFE-lined butterfly valve supports a wide range of global piping systems. It withstands continuous operation at elevated temperatures up to 300°C, and for applications requiring higher abrasion resistance, a UHMWPE seat option is also available.

Size Range: DN40-DN300 (1 1/2"-12")
Body Materials: GJS500-7 Ductile Iron Rilsan Coated
Disc Materials: CF8M Coated PTFE FDA Approved
Seat Materials: PTFE FDA Approved, UHMWPE
Actuated Function: Lever Operated, Hand Wheel / Gear Box Operated, Extended / Extension Chain Wheel
Applications: Chemical, Pharmaceutical, Petrochemical, Corrosive, Food & Beverage, Water, Vacuum
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High Performance Butterfly Valves

The 8" High Performance Butterfly Valve is engineered for demanding industrial environments where precise control, pressure handling, and long-term reliability are essential. Designed with a double or triple eccentric body, this valve provides tight shutoff and exceptional sealing performance, even under high pressures and temperatures.

Built for durability, the valve is available with metal or PTFE seats, making it suitable for aggressive media, high-cycle operations, and critical isolation points. Its offset disc design reduces seat wear, lowers operating torque, and extends service life—perfect for throttling or modulating applications.

Size Range: DN50-DN600 (2"-24")
Body Materials: Cast Carbon Steel A216 WCB, Stainless Steel CF8M
Disc Materials: Stainless Steel CF8M
Seat Materials: RPTFE Soft Seat, F-316L Stainless Steel Hard Seat, Stellite, Hard Chromium
Actuated Function: Lever Operated, Hand Wheel / Gear Box Operated, Extended / Extension Chain Wheel
Applications: Vacuum, Chemical, LPG/LNG, Hydrocarbons, Steam, Air, Bitumen, Corrosive, Thermal Oil
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Aluminium Bronze Butterfly Valves

Designed with a concentric seat layout, the 8” valve provides tight shutoff for both on/off and throttling duties, making it suitable for fire protection, cooling water systems, potable water, ballast control, and HVAC operations. The valve is compatible with flange standards including ANSI 150, PN10, PN16, and JIS, ensuring versatile installation across global applications.

The 80LM580 is part of a proven Aluminium Bronze valve range trusted in marine and offshore sectors, where long-term stability and minimal maintenance are crucial. Standard options include EN 10204 3.1 certification, hydrostatic pressure testing, and third-party inspection. Additional certification packages are available upon request.

Size Range: DN32-DN1600 (1 1/4"-64")
Body Materials: B148 C9500 Aluminium Bronze
Disc Materials: B148 C9500 Aluminium Bronze
Seat Materials: EPDM, NBR Buna, Hypalon, Viton, Silicone, High Temperature, Polyisoprene, Epichloridine
Actuated Function: Lever Operated, Hand Wheel / Gear Box Operated, Extended / Extension Chain Wheel
Applications: Potable/Waste/Sea Water, Cooling Systems, Oil, Gases, Air, Desalination, Marine Applications
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Bronze Disc Butterfly Valves

The 8" 20W3080 Bronze Disc Butterfly Valve is engineered for medium-to-large flow systems where corrosion resistance and reliability are key. Featuring a robust ductile iron body with a B148 Aluminium Bronze disc, this valve offers long-lasting performance in marine, offshore, and industrial chemical environments.

Its concentric design includes a replaceable rubber-lined seat, forming a tight seal on both sides of the disc for bidirectional flow control. Whether you're isolating or throttling flow, the 8" valve delivers smooth operation and consistent performance in demanding conditions.

Size Range: DN32-DN1600 (1 1/4"-64")
Body Materials: GJS500-7 Ductile Iron Rilsan Coated
Disc Materials: B148 C9500 Aluminium Bronze
Seat Materials: EPDM, NBR Buna, Hypalon, Viton, Silicone, High Temperature, Polyisoprene, Epichloridine
Actuated Function: Lever Operated, Hand Wheel / Gear Box Operated, Extended / Extension Chain Wheel
Applications: Potable/Waste/Sea Water, Cooling Systems, Oil, Gases, Air
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Frequently Asked Questions

The standard face-to-face dimension for an 8" wafer or lugged butterfly valve is typically between 95mm and 127mm, depending on whether it follows EN 558, API 609, or other regional standards.

An 8" butterfly valve generally offers a Cv value between 2,500 and 3,000, providing excellent flow control for medium to high-capacity systems.

Common pressure classes include PN10, PN16, and ANSI 150, with high-performance versions capable of handling higher pressure ratings when using double or triple offset designs.

Body materials include ductile iron, carbon steel, stainless steel, and Aluminium Bronze. Disc materials vary from CF8M stainless steel to Duplex and bronze, depending on the application's corrosion resistance needs.

Typical seat materials include EPDM, NBR, Viton, PTFE, and Silicone, each offering compatibility with different temperatures, pressures, and media types.

Yes. 8" butterfly valves come with an ISO 5211 mounting pad, allowing for easy automation using pneumatic or electric actuators for both on/off and modulating applications.

Absolutely. The disc design and wide range of actuation options make 8" butterfly valves ideal for throttling flow in addition to simple open/close isolation.

These valves are commonly used in HVAC, water treatment, marine, chemical processing, fire protection, and general industrial systems due to their reliable performance and adaptability.

Yes. Most 8" butterfly valves are designed to operate bi-directionally, meaning flow can pass in either direction without affecting performance or sealing.

Yes. They are available with lever or gearbox operation, although gearbox-operated options are preferred at this size due to torque requirements.

These valves are typically compatible with ANSI 150, PN10, PN16, and JIS flanges, offering flexibility for installation across a wide range of systems.

Yes. Most manufacturers provide replacement seats, seals, discs, and shafts, helping extend the valve's service life and simplify maintenance procedures.

FAQ

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8 inch Butterfly Valves