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Keystone Figure 9 Resilient seated butterfly valve

Keystone™ figure 9 is a resilient seated butterfly valve for general purpose application.

Keystone

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End Connection	Wafer
Application	Air Circulation, Facilities & Process Utilities
Material	316 Stainless Steel, Cast Iron
Operating Temperature	Up to 250 F (120 C)
Pressure Class	ASME
Process Connection Type	150RF
Seat/Seal Type	Resilient
Shutoff Class	Zero Leakage
Valve Size Standard	NPS
Valve Type	Butterfly
Media	Air, Liquids, Water
Stem	O-ring

Bubble-tight shut-off at full pressure rating (PTFE lined configuration is drop tight).
The seat and the disc are the only two valve parts in contact with the medium.
Superior design for abrasive and erosive media.
Famous Keystone dovetail seat design.
Very low pressure drop.
Large number of material combinations available.
Standardized actuator flange for easy operator interchangeability.
Top bushing absorbs side thrust loads.
Hub seal provided by preloaded contact between flatted seat surface and disc hub area for positive sealing at all disc positions.
One-piece wafer thin disc stem gives the very minimum obstruction to flow.
Field replaceable seat isolates the body and stem from the flow.
Molded-in O-rings provides flange sealing and eliminates need for gaskets.