"Keystone" Butterfly valve Fig.221-222
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20/09/2012 15:41
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Figures 221 and 222 Resilient Seated Butterfly Valve
Figures 221 (wafer) and 222 (lug style) with molded-in seat design are suited for heating, ventilation, air conditioning and general industrial services.
Features & Benefits:
- Molded-in resilient seat provides bubble-tight shutoff to 250 psi.
- Offered in two body styles: wafer and lug. The lugged body is drilled and tapped for isolation and removal of downstream piping at full rated pressure.
- Round, polished disc and hub edge provides 360 degree concentric seating, minimum flow restriction, lower torques and longer seat life.
- Upper and lower inboard bronze bearings ensure longer service life with low operating torques.
- Thru-stem design provides high strength and positive disc control with standardized end connection for operator interchangeability.
- Extended neck allows adequate clearance for flanges and insulation.
- Bi-directional, self-adjusting stem seal, located in the upper journal, is suitable for vacuum and pressure while also preventing external contamination of the stem area.
- Heavy-duty corrosion resistant top bushing, located in the upper journal, absorbs actuator side thrust.
- Cast-in top plate is an integral part of the body and is standardized to allow direct mounting of all Tyco actuators.
- Each valve is factory tested to 110 percent of specified pressure rating.
Size Range: 2" to 12"
Pressure Rating: 250 psi
Bi-directional Dead End Rating: 250 psi
Temperature Rating: -40°F to +250°F
Flange Accommodation: ASME 125/150
