Detailed Butterfly Valve Description

Specifications:
a) Standard compliance:
 1) Flange butterfly valves: MSS SP - 67
 2) Wafer butterfly valves: MSS SP - 68 or API 609
 3) Face to face dimensions: ANSI B16.10, MSS SP - 67, and MSS SP - 68 
 or 609
 4) Test: API 598
 5) End flange dimensions:
 ) NPS 1 1 / 2-24: ANSI B16.5
 ) NPS 30 - 72: MS SP - 44 or API 605
b) Type of construction:
 1) Flange butterfly valves (hard and soft )
 2) Wafer butterfly valves (hard and soft )
c) Type of connection:
 1) RF and RTJ flange ends to ANSI B16.5 or API 605 and MSS SP - 44 
 standard
d) Type of operation:
 1) Lever
 2) Worm gear, electric, or pneumatic actuator