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A,Model specification

MFC . A-I- 20
1, 2, 3, 4, 5

1: Superposition type one-way speed regulating valve

2:02: nominal diameter NG6 (CETOP3 D03); 03:NG10(CETOP5,D05)
04:NG16(CETOP7,D07)

3: function action hole A: A hole;B: B hole;W: kathi Jones from A&B hole

4:Throttling way Blank: export throttling; I: inlet throttling
5: design code 

Second, the specification table