... ). Pneumatic three-piece ball valveModel : ZTQ61(6,8,2)F (N, P, H, Y )Bore: DN10-100mmPressure: 1.6, 2.5, 4 ... ), Stainless steel(CF8, CF8M, CF3, CF3M)Seat material: PTFE, PPL, N, H, YMode of action: double-acting, single-acting (spring reposition ...