... . 2. Main technical data and function:(1) valve body:Type: single seat ball valveDN: 32, 40, 50, 65, 80, 100, 125, ... packing, graphite packing, etc Pats in valveType of valve core: single seat piston type valve core Flow characteristics High precision characteristics of ... flow as per 2-2Metal valve seat Percentage characteristics (%CF) and Linear characteristics (LCF)Soft ...