Which butterfly valve seat design should be used?

Common designs include resilient seats and metal seats. Resilient-seated valves are generally used for water, air and low-leakage services at moderate temperatures. Metal-seated valves are selected for higher temperature, pressure or erosive industrial media. The final choice depends on the medium, temperature, pressure and required leakage class.

How do wafer, flanged and lug butterfly valves differ?

Wafer valves are compact and require little installation space. Flanged valves provide a stable pipeline connection for larger sizes or higher pipe loads. Lug valves can facilitate one-sided removal and maintenance. Selection depends on the piping standard, space, size and maintenance method.

Should a butterfly valve use pneumatic, electric or manual actuation?

Manual or gearbox operation suits local isolation. Pneumatic actuators provide fast response for frequent operation and hazardous areas. Electric actuators support remote control and modulation. The actuator must be sized for valve size, differential pressure, torque and control signal.

Which operating data are required for butterfly valve selection?

Provide the medium, design temperature, design pressure, nominal size, connection standard, body and seat materials, leakage class, flow direction, operating frequency, actuation method and any enclosure or explosion-protection requirements.

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Home > Valve Types > butterfly valve

A butterfly valve rotates a disc within the flow passage. Concentric, double-offset and triple-offset layouts describe different shaft and sealing geometries; a metal seat does not by itself establish a triple-offset design.

Butterfly valves: compare construction, connections and application requirements. Confirm materials, operating conditions and complete-valve ratings for your project.

Two way hard to hard all metal hard sealed butterfly valve

Fully lined EPDM rubber lug butterfly valve

High performance clamp butterfly valve with smooth stem

Ductile iron QT450 handle lug butterfly valve

Butterfly valve with limit switch signal feedback

Lock key switch anti-theft butterfly valve

Handle type high-performance butterfly valve

Fully welded butterfly valve with metal hard seal worm gear

JIS 20K metal hard sealed double flange butterfly valve

Vacuum double flange butterfly valve

Worm gear steel lined PTFE butterfly valve

JIS 10K Japanese standard butterfly valve - worm gear transmission

Ripple insulation cover high temperature clamp butterfly valve

German standard metal hard seal flange butterfly valve - triple eccentric

Large caliber hydraulic double eccentric double flange butterfly valve

Low temperature cryogenic treatment flange butterfly valve - triple eccentric/hard seal

Buried flange hard seal butterfly valve - triple eccentric

Extended stem double flange hard seal butterfly valve - triple eccentric

JIS20K Three Eccentric Clamp Butterfly Valve - Metal Hard Seal

ANSI American standard double flange metal hard seal butterfly valve - triple eccentric

Worm gear worm lug butterfly valve

Worm gear hard seal lug butterfly valve

Fluorine lined lug butterfly valve - PFA/PTFE/FEP

Stainless steel lug butterfly valve with handle - hand operated

High performance double flange butterfly valve with smooth stem

High platform and high-performance clamp butterfly valve

High performance light rod convex ear butterfly valve with double eccentricity

Worm gear high-performance butterfly valve D372F

Chain type switch flange butterfly valve

Insulated jacket flange butterfly valve - hard seal BWD343H

Butterfly valves — Selection and installation guide

Design and application checks

Check the disc clearance inside the mating pipe, liner or seat compatibility, permitted flow direction and actuator torque. Throttling duty requires a separate review of differential pressure, cavitation, noise and erosion, not just an on/off actuator.

What should I provide for a quotation?

Provide the fluid and composition, solids content, normal and design pressure and temperature, DN or NPS, connection standard, installation orientation, operating duty and required inspection documents. State any corrosion, vacuum, fire-safety or emissions requirements separately.

How do I confirm the pressure and temperature rating?

Use the approved data sheet, nameplate and pressure–temperature limits for the complete valve, including its seat, lining and seals. PN, ASME Class and JIS K are different designation systems, not a fixed numerical conversion. A shared nominal size does not establish flange interchangeability.

What must be checked before installation?

Compare the face-to-face dimension, flange drilling and facing, pipe bore, flow direction and maintenance clearance with the approved drawing. Clean and isolate the pipeline, release pressure and follow the product installation instructions. Do not use flange bolts to pull misaligned pipework into position.

butterfly valve

Butterfly valves — Selection and installation guide

Design and application checks

What should I provide for a quotation?

How do I confirm the pressure and temperature rating?

What must be checked before installation?

Related product categories

Butterfly Valve FAQs