Size Orifice diameter (mmo) Model Maximum operating pressure differential (MPa) 1.0 0.6 0.2 1.0 0.15 1.0 0.3 2 3 5 4 7 5 7 1 2 3 C [dm3/(s・bar)] b 0.23 0.41 0.62 0.62 1.08 0.75 1.08 0.63 0.68 0.39 0.52 0.44 0.55 0.44 0.63 1.05 2.20 1.90 3.99 1.96 3.99 Cv Flow-rate characteristics Normally Closed (N.C.) VX2A0 VX2B0 VX2C0 Normally Open (N.O.) Size Orifice diameter (mmo) Model Maximum operating pressure differential (MPa) 0.9 0.45 0.2 0.8 0.15 0.8 0.3 2 3 5 4 7 5 7 1 2 3 C [dm3/(s・bar)] b 0.23 0.41 0.62 0.62 1.08 0.75 1.08 0.63 0.68 0.39 0.52 0.44 0.55 0.44 0.63 1.05 2.20 1.90 3.99 1.96 3.99 Cv Flow-rate characteristics VX2D0 VX2E0 VX2F0 Common SUP type 2 (OUT) 1 (IN) 2 (OUT) 2 (OUT) 1 (IN) 2 (OUT) 1.0 Max. system pressure (MPa) 1.0 When the valve is closed, flow is blocked from port 1 to port 2. However, if the pressure in port 2 is higher than port 1, the valve will not be able to block the fluid and it will flow from port 2 to port 1. Model/Valve Specifications Series VX21/22/23 . For other fluids, please contact SMC. For Air Manifold Symbol N.C. Common SUP type N.O. Symbol Fluid and Ambient Temperature Note) Dew point temperature: .10°C or less Ambient temperature (°C) .20 to 60 Fluid temperature (°C) .10 Note) to 60 Valve Leakage Rate Internal Leakage Note 1) Leakage is the value at ambient temperature 20°C. Note 2) For seal material/FKM, refer to “Other Options” on page 21 for the selection. External Leakage NBR (FKM) Seal material Note 2) Leakage rate Note 1) 1 cm3/min or less NBR (FKM) Seal material Note 2) Leakage rate Note 1) 1 cm3/min or less Max. system pressure (MPa) A 8