Butterfly Valves
Verified by Mel Sykes, Industrial Supply Chain Specialist - April 2026
| Specification | Details |
|---|---|
| Types | Wafer, lug, double flange, high performance |
| Materials | Cast iron, ductile iron, stainless steel |
| Sizes | DN50 to DN2000 |
| Standards | BS EN 593, API 609 |
What are Butterfly Valves?
Butterfly valves are quarter-turn rotational motion devices used to control fluid flow in pipelines. They feature a circular disc that rotates perpendicular to the direction of flow within the valve body.Types and Variants
Butterfly valves come in several types, each designed for specific applications:- Wafer Type: Compact design fits between flanges; suitable for smaller lines (DN50 to DN400).
- Lug Type: Doesn't require bolts on both sides of the valve; ideal for high-pressure applications up to 16 bar.
- Double Flange Type: Features bolted flanges on each side, providing additional strength and sealing capability; typically used in large diameter pipes (DN500 to DN2000).
- High Performance Butterfly Valve: Designed with a strong construction that offers better control over flow rates and pressures.
Materials and Specifications
Butterfly valves are available in various materials:- Cast Iron: Durable for general use, suitable for water and wastewater applications (e.g., BS EN 593).
- Ductile Iron: Offers higher strength and resistance to corrosion; ideal for severe service conditions.
- Stainless Steel: Corrosion-resistant, suitable for harsh chemical environments such as pharmaceuticals or food processing. Common grades include A2-70 stainless steel.
Dimensions range from DN50 up to DN2000, with pressure ratings typically ranging from 1 bar to 40 bar depending on the material and type of valve. Temperature ranges vary by material but generally cover -20°C to +350°C.
Selection Criteria
Choosing the right butterfly valve involves considering:- Flow Requirements: Ensure the valve can handle the required flow rate without excessive pressure drop.
- Pressure Ratings: Select a valve that meets or exceeds system pressures. For example, lug type valves are rated up to 16 bar while double flange types can go as high as 40 bar.
- Material Compatibility: Choose materials based on the fluid's chemical composition and operating environment.
- Installation Space: Wafer types fit snugly between flanges, whereas lug and double flange styles may require more space.
UK Suppliers
MLC lists verified suppliers from Companies House who meet strict quality criteria. These companies provide a range of butterfly valves with detailed technical documentation and compliance certificates for standards like BS EN 593 and API 609. By sourcing from these suppliers, you ensure that Butterfly Valves meet industry requirements.Common Applications
Butterfly valves are widely used in various industries:- Water Treatment Plants: For regulating flow in large pipes.
- Chemical Processing: High-performance valves handle corrosive fluids with ease.
- Pharmaceutical Industry: Stainless steel valves maintain hygiene and purity standards.
- Food & Beverage Production: Ensures compliance with strict sanitary regulations.
By carefully selecting the right butterfly valve based on material, type, and application requirements, engineers can optimize performance and reduce maintenance costs.
References
Verified UK Suppliers
| Company | Company No. | Location |
|---|---|---|
| Hayward Tyler Limited | 03450138 | 1 Kimpton Road, Luton, Bedfordshire, LU1 3LD |
| Fohen Limited | 11858967 | Fourth Floor Abbots House, Abbey Street, Reading, |
| Tmh Trading Limited | 11493534 | 2 Michaels Court Hanney Road, Southmoor, Abingdon, |
| Rotaflow Fv Limited | 01851533 | Rotec House, Bingswood Ind. Est., Whaley Bridge, H |
| Rotaflow Group Limited | 08368595 | Rotec House Bingswood Trading Estate, Whaley Bridg |
Frequently Asked Questions
What are Butterfly Valves?
Butterfly Valves are engineering components used in industrial applications. Browse verified UK suppliers on MLC.
Where can I buy Butterfly Valves in the UK?
MLC lists verified UK butterfly valves suppliers with Companies House data. Browse by product category or search by location.
What are Butterfly Valves and what types do they come in?
Butterfly valves are quarter-turn rotational motion devices used to control fluid flow in pipelines. They come in various types, including wafer, lug, double flange, and high performance.
How do you choose the right type of Butterfly Valve for a specific application?
Selecting the correct butterfly valve depends on factors like line pressure, diameter, and material requirements. For instance, lug types are ideal for high-pressure applications up to 16 bar, while double flange valves work best in large diameter pipes (DN500 to DN2000).
What materials are used in the construction of Butterfly Valves?
Butterfly valves can be made from cast iron, ductile iron, or stainless steel. The choice depends on factors such as corrosion resistance and strength requirements.
Which standards apply to Butterfly Valves in the UK?
In the UK, butterfly valves adhere to BS EN 593 and API 609 standards, ensuring compliance with quality and safety regulations.
Where can I find reliable suppliers of Butterfly Valves for industrial use in the UK?
Reliable suppliers of butterfly valves in the UK include MLCSpares and other reputable industrial supply chain partners who offer a wide range of valve types suitable for various applications.
What is the size range available for Butterfly Valves, and which sizes are most common?
Butterfly valves come in sizes ranging from DN50 to DN2000. Commonly used sizes include DN150, DN300, and DN400, catering to a variety of industrial pipeline needs.
How does the cost of Butterfly Valves vary based on type and material?
The cost of butterfly valves varies significantly depending on their type (wafer, lug, double flange) and material (cast iron, ductile iron, stainless steel). High-performance types made from more durable materials like stainless steel tend to be more expensive.
What is the typical lifespan and maintenance requirements for Butterfly Valves?
The lifespan of butterfly valves can range from 10 to 30 years depending on operating conditions and material. Maintenance typically involves regular inspection, lubrication, and seal replacement to ensure optimal performance.