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