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Keystone Resilient Seated Butterfly Valves - Figure 221/222

Keystone Resilient Seated Butterfly Valves - Figure 221/222



Keystone 221/222 Butterfly Valves 

An economical bonded resilient seated butterfly valve for bi-directional and end-of-line service.

• F221 Wafer style valve
• F222 Lugged style valve

Features:

• Bubble tight shut-off at full rated pressure in both directions.
• The F222 lugged version is suitable for bi-directional end-of-line service at full
pressure rating.
• Top and bottom bearings absorbs side thrust loads.
• A molded-in O-ring in the seat for flange sealing eliminates the need for flange
gaskets.
• Body locating holes for easy installation and centering between flanges.
• Extended neck allows adequate

Application:

Ideal for building services and irrigation applications that require shut-off control.
The valve has a molded in seat and can be used in full vacuum service.


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