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Technical guide · August 2, 2026

Wafer, Lug and Flanged Butterfly Valves: How to Choose

Compare wafer, lugged and double-flanged butterfly valve body styles for water and industrial pipelines.

Wafer, Lug and Flanged Butterfly Valves: How to Choose

Body style affects installation, alignment, end-of-line capability, weight and maintenance access. Selection should reflect the pipeline arrangement and service duty rather than price alone.

Wafer body

Compact and economical between two flanges, but normally depends on the complete flange-and-bolt assembly.

Lug body

Threaded lugs can support equipment isolation and downstream pipe removal when the selected design and rating permit.

Double-flanged body

Provides rigid alignment for large diameters, buried mains and important water infrastructure.

Installation checks

Confirm flange drilling, pipe inside diameter, disc clearance, gasket practice and bolt tightening sequence.

Information to include with an enquiry

Provide nominal size, pressure rating, medium, temperature, connection standard, materials, operating method, required testing and project documentation. Greysen will review the duty and confirm the final configuration in the approved data sheet.

Talk to an engineer

Specify the right butterfly valve for your project.

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