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What is BS EN 593 butterfly valve? How to customize it?

BS EN 593 combines European norms (EN) for butterfly valves with British Standards (BS). It outlines specific requirements for butterfly valves, covering design, materials, dimensions, and testing methods. These standards ensure compatibility with European markets while adhering to British practices. BS EN 593 defines the minimum requirements for metal butterfly valves, applicable to various pipe end connections, for isolation, regulation, or control purposes.

BS EN 593 species the class and size ranges, and PNs of butterfly valves. It can be apply to all kinds of industrial-use metallic butterfly valves.

Additional requirements given in the relevant application standards can apply to metallic butterfly valves used for more specific applications (for example, in the water industry, the chemical and petrochemical process industry, and the oil and gas industry). 

For some more specific applications, like oil and gas, the petrochemical and chemical process and water industry, there should be some additional requirements based on BS EN 593.

BS EN 593 Revisions

BS EN 593 has undergone several revisions.

BS EN 593:2009+A1:2011 has been withdrawn, and the current standard followed is BS EN 593:2017.

 BS EN 593:2017 includes some technical changes with respect to BS EN 593:2009+A1:2011. These include: 

a. The extension of the dimensions to cover PN 2,5 to PN 160, Class 150 to Class 900 and DN 20 to DN 4000.

b. The inclusion of single, double, and triple eccentric designs.

c. A reference to EN 16668 for valves subject to European legislation on pressure equipment.

d. The addition of informative Annex D giving the correspondence between DN and NPS.

e. The addition of informative Annex E on valve torque curves at different flow velocities.

Industries that need BS EN 593 Metallic butterfly valves

a. Marine industries

b. Residential uses

c. Manufacturing sectors

d. Oil and natural gas

e. Chemical plants

f. Petrochemicals

g. Industries with gas storage tanks

Entities that may have to be familiar with BS EN 593 standard

a. Inspection bodies

b. Mechanical engineers

c. Quality control personnel

d. Research and development team

e. Design engineers

How to customize BS EN 593 butterfly valve from a reliable valve manufacturer?

To customize a BS EN 593 butterfly valve from a reliable manufacturer, you can follow these steps:


Begin by researching reputable manufacturers known for producing high-quality butterfly valves that meet BS EN 593 standards.

Tianyu Valve Technology Co., Ltd. is a professional BS EN 593 butterfly valve company that integrates research, development, design, manufacturing, and sales services. Currently, we possess over 200 sets of large and medium-sized production equipment, such as CNC machine tools and machining centers.

Reach out to the manufacturer directly through their website, email, or phone to discuss your customization requirements.

Specify Requirements:

Clearly communicate your specifications and customization needs, including desired materials, dimensions, end connections, and any additional features or modifications.


Engage in a consultation with the manufacturer’s engineering team to discuss technical details and feasibility of your customization requests.

Design Approval:

Review and approve the design proposals provided by the manufacturer to ensure they align with your requirements and comply with BS EN 593 standards.

Butterfly Valve Design

Butterfly Valve Design


Once the design is finalized and approved, the manufacturer will proceed with the production of your customized BS EN 593 butterfly valve.

Butterfly Valve Production

Butterfly Valve Production

Butterfly Valve Production

Butterfly Valve Production

Quality Assurance:

Ensure that the manufacturer adheres to strict quality control measures throughout the manufacturing process to guarantee the reliability and performance of the customized valve.

Testing and Inspection:

Request testing and inspection certificates to verify that the customized butterfly valve meets all necessary standards and specifications.

At Tianyu Valve, all BS EN 593 butterfly valves undergo rigorous testing processes to meet your requirements. We will provide corresponding inspection reports to you.


Coordinate with the manufacturer for the delivery of your customized BS EN 593 butterfly valve according to your timeline and requirements.


Are BS EN 593 butterfly valves suitable for high-pressure applications?

Yes, BS EN 593 butterfly valves can be suitable for high-pressure applications, depending on their design and construction. While some butterfly valve designs may have limitations regarding pressure ratings, manufacturers offer models specifically engineered to withstand high pressures.

In these high-pressure applications, it’s crucial to select butterfly valves that comply with the necessary standards and have been tested to ensure their ability to handle the required pressure levels safely. Additionally, proper installation and maintenance are essential to ensure optimal performance and prevent potential issues such as leakage or valve failure.

Ultimately, consulting with valve manufacturers or industry experts can help determine the most appropriate butterfly valve for specific high-pressure applications, ensuring reliable and efficient fluid control in demanding environments.

What are the main differences between wafer, lug, and flanged butterfly valves?

Wafer Butterfly Valve:

a. Compact and lightweight.

b. Fits between flanges.

c. Ideal for low-pressure, space-limited applications like HVAC systems.

Lug Butterfly Valve:

a. Features threaded inserts (lugs).

b. Easy installation without pipeline disruption.

c. Suitable for higher pressure ratings and versatile maintenance.

Flanged Butterfly Valve:

a. Integral flanges for direct bolting.

b. Robust construction for high pressure and temperature.

c. Commonly used in industrial settings for reliable sealing and performance.

How often should butterfly valves be inspected and maintained?

Butterfly valves should be inspected regularly, typically every six months to a year, to check for wear, corrosion, and proper operation. Maintenance tasks like lubrication and seal replacement should follow manufacturer guidelines for optimal performance and longevity. Following this schedule helps prevent issues and ensures continued safe operation.

Can butterfly valves be used for throttling applications?

Yes, butterfly valves can be used for throttling applications, but they’re better suited for quick on-off control rather than precise flow adjustment. Factors like valve size and system requirements should be considered, and consulting with experts can help determine suitability.

What safety precautions should be followed when working with butterfly valves?

a. Ensure personnel are trained.

b. Wear proper PPE.

c. Use lockout/tagout procedures.

d. Relieve pressure before maintenance.

e. Secure valve position.

f. Regularly inspect for wear or damage.

g. Follow manufacturer guidelines.

h. Know emergency procedures.


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