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The Beaver F21–F24 Butterfly Valve is a high-performance valve with a double-offset geometry. In this design, the stem is behind the disc (first offset) and slightly off the pipe centreline (second offset). This minimises the disc’s contact with the seat during opening and closing, resulting in less wear.

This is a highly reliable valve used for on/off or modulation in critical services in chemical and petrochemical, power and utilities, and hydrocarbon processing and storage applications.

The valve comes with two seat options: wear-resistant soft seat, which offers bubble-tight zero leakage, and temperature-resistant metal seat, which has an allowable leakage rate. It’s available with a wafer or lugged body design in Class 150 and 300.

Technical specifications




F21 (Wafer Class 150)
F22 (Lugged Class 150)
F23 (Wafer Class 300)
F24 (Lugged Class 300)

Size range

DN50–1200 (2–48”)

Pressure class

Class 150 and 300

Temperature range

ASME B16.34

Actuator options

Gear operated

Material specifications


WCB carbon steel
Duplex stainless steel
Nickel alloy
Austenitic stainless steel
Copper alloy



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1. Tell us what you need

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2. Choose the right solution

We’ll do all the analysis, discuss the options with you, and make a recommendation—the valves we’d choose in your shoes.

3. Get the job done

Get the right valves for the job, fitted out, tested, and ready to install. We’ve got your back with ongoing repairs and maintenance.

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