Keystone Figure 9 Butterfly Valve

Features

• 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.