4 inch Butterfly Valves

The 4" (DN100) butterfly valve is a widely used size across multiple industries, striking the perfect balance between flow capacity and ease of handling. Whether used for isolation, throttling, or automated flow control, this size is ideal for medium-duty systems in sectors such as water treatment, HVAC, chemical processing, and food production.At Actuation Valve, we supply 4" butterfly valves in a range of body materials including ductile iron, stainless steel, carbon steel, and PTFE-lined options. With TTV’s reliable construction, you can expect precise shutoff, low torque operation, and excellent corrosion resistance.

Key Features

Key features and benefits.
1

Key Features

The 4" butterfly valve offers an excellent flow rate while maintaining a compact form, making it suitable for medium-duty pipelines. It balances performance and efficiency, reducing pressure loss across the system.
2

Key Features

Available with a wide selection of body and seat materials, including stainless steel, carbon steel, and PTFE-lined configurations. This flexibility allows it to perform in a variety of environments—from clean water to corrosive chemicals.
3

Key Features

Fitted with an ISO 5211 mounting pad, the valve is ready for direct connection to pneumatic or electric actuators. This allows for quick installation and effortless upgrade from manual to automated operation.

Ductile Iron Butterfly Valves

The TTV 20W3040 is a Rilsan Coated Ductile Iron Bodied Valve with a CF8M Stainless Steel Disc & 304 Stainless Steel Shaft. A one piece body concentric design features four entering lugs which allows for easy installation between two flanges at intermediate points within the process pipeline. Suitable for General Purpose applications for a range of industries the 20W3040 is both economical and versatile. A single piece shaft design brings high strength and engineering with direct mount capabilities for actuation assemblies. The “Dry Shaft” feature ensures fluid is again isolated from both the shaft and the body of the valve.

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
Find Out More

Carbon Steel Butterfly Valves

The TTV 50W3040 is a Rilsan Coated WCB Carbon Steel Bodied Valve with a CF8M Stainless Steel Disc & 304 Stainless Steel Shaft. A one piece body concentric design features four entering lugs which allows for easy installation between two flanges at intermediate points within the process pipeline. Suitable for more demanding and rigorous applications to that of the 20W3040, this carbon steel valve offers solutions for both on and off or throttling applications. The quarter turn action offers quick opening or closing with ease of operation and the valve has good flow control characteristics. In the wide open position, the only obstruction to flow is that due to the thickness of the disk, so the pressure drop across the valve is small.

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
Find Out More

Stainless Steel Butterfly Valves

The 40W4040 Manual Butterfly range from Actuation Valve provides positive shutoff performance and reliability for both external and internal corrosive applications. The stainless steel valve body promotes longevity with a replaceable concentirc rubber lined seat. Whether you are looking for a simple Lever Operated solution or multi turn Gear Box operated product, we have a range of Worm Gear and Chain Wheel valve packages to suit your requirements. Fully stainless steel materials. This package is designed to be used in harsh, external environments and mediums that are aggressive towards the material itself. It can be used for a variety of applications ranging from food & beverage to chemicals & petrochemicals.

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
Find Out More

PTFE Lined Butterfly Valves

Mainly for use in highly corrosive environments and higher service temperatures, the High Performance Wafer Pattern PTFE 20WP4040F0T features a split body design with four flanged hole drillings for easy maintenance and installation between flanges at desired locations within the pipeline where weight and space saving is a priority. The complete PTFE Seat avoids any possibility of cross-contamination providing a valve that is extremely resistant to chemicals and solvents with complete insolubility to 300°C. For additional abrasion resistance the option of a UHMWPE also is 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
Find Out More

High Performance Butterfly Valves

High-performance Metal Seated Manual Valves are designed for use in exceptionally harsh conditions with critical shutoff isolation and throttling control applications for both gases and liquids.  The aptly named Colossus is available in Double Eccentric Metal Seated, Double Eccentric PTFE Seated and Triple Eccentric Metal Seated body designs. These Firesafe Valves are now more commonly being used over that of equivalent sized Gate, Globe & Ball Valves. The Colossus Series offers exceptional performance at an affordable price point, making them perfect for a wide range of industrial applications. These PTFEand metal seated valves feature double offset construction which allows them to handle higher operating pressures.

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
Find Out More

Aluminium Bronze Butterfly Valves

The 80LM580 builds on the previously succesful 80LK8N & TTV-ABABM ranges of Aluminium Bronze Valves that are predominantly supplied for seawater applications or valves that are exposed to the open marine environment. Aluminium Bronze is favoured for its corrosion resistance and used in marine applications where it may be subject to salt water or brackish conditions. Ali Bronze maintains long term stability and is used on fire protection, potable water, cooling, ballast & HVAC systems. Actuation Valve have extensive experience providing these valves within the Marine and Offshore Industry sectors providing quality product solutions for some of the most remote and demanding environments. Alumiunium Bronze Valves are available for next day delivery for sizes up to 12".

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
Find Out More

Bronze Disc Butterfly Valves

Fitted with a B148 Aluminium Bronze disc, this valve delivers long-term durability and corrosion resistance, making it a trusted choice for demanding flow control tasks. The concentric body design includes a replaceable seat that conforms to both sides of the disc, ensuring a reliable, bubble-tight seal for both on/off and throttling functions.

The 20W3080 is compatible with a wide range of flange standards, including ANSI 150, PN10, PN16, and JIS, allowing for flexible integration across global systems. We offer various certification options, including EN 10204 3.1, witness testing, and pressure test reports, with additional documentation available upon request. With readily available spare parts and stock support, this valve is ideal for maintenance-driven environments that require both performance and longevity.

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
Find Out More

Frequently Asked Questions

Most 4" wafer or lugged butterfly valves conform to EN558-1 Series 20 or API 609, with face-to-face lengths typically around 64mm to 75mm, depending on the design and standard.

Common pressure ratings include PN16 for metric systems and ANSI 150 for imperial/ASME standards. High-performance models can also handle higher pressure classes.

Popular body materials include ductile iron, carbon steel, and stainless steel, while discs are available in CF8M stainless steel, Aluminium Bronze, or Duplex for corrosive or seawater applications.

Seat options include EPDM, NBR, Viton, Silicone, and PTFE, depending on media compatibility and temperature requirements.

Yes. Butterfly valves in the 4" size are commonly used for both on/off isolation and flow modulation, offering precise throttling control when required.

Absolutely. Most 4" valves feature an ISO 5211 mounting pad, allowing quick and direct mounting of electric or pneumatic actuators for automated control.

A standard 4" butterfly valve typically has a Cv value ranging from 300 to 400, depending on the disc shape and internal design, offering excellent flow performance.

Yes—with the right material selection such as Aluminium Bronze or Rilsan-coated Carbon Steel, 4" butterfly valves are perfectly suited for outdoor, marine, and offshore use.

Manual operation usually requires 20–50 Nm of torque, depending on pressure and media. For automated setups, actuator sizing is based on system conditions and safety factors.

Yes. Most designs are bi-directional, meaning they can be installed to allow flow in either direction without compromising performance.

Yes. Manual 4" valves can be fitted with a worm gear operator or chain wheel for smoother control, especially under higher pressure or for frequent operation.

Common sectors include HVAC, water treatment, chemical processing, marine and offshore, food & beverage, and fire protection systems.

FAQ

Request more information or Advice

Please feel free to request information and advice using the form below or call us on 0151 547 1221

4 inch Butterfly Valves