API609 Cast steel Butterfly valve 150# Technical Requirement: 1. Globe valves API609 2. Face to face API609 3. End flanges ANSI B16.5 4.Inspection and test API 598 Actuator Flange: Accommodates all types of actuators, handles, gear operators, electric actuators, and pneumatic actuators. Bushings: Stem bushing reduces torque and isolates the stem from the valve body, preventing seizure of the stem due to corrosion in the stem journal baring. Precision Profile Disc: Provides bubble-tight shut-off and assures minimum torque and longer seat life. Shaft Weather Seal: (Below bushing on some models) Seat Face: Eliminates need for flange gaskets. Phenolic Backed Seat: Non-collapsible, stretch resistant, blow-out proof, field replaceable.