Normally Closed (N.C.) Size Port size Orifice diameter (mmo) Model Maximum operating pressure differential (MPa) 1 0.6 0.2 1 0.15 1 0.3 0.1 0.1 300 300 300 460 460 580 580 580 630 2 3 5 4 7 5 8 10 10 1/8, 1/4 1/4, 3/8 1/4, 3/8 1/2 1 2 3 AV (x 10.6 m2) 0.23 0.42 0.63 0.63 1.08 0.75 1.58 2.21 2.21 5.5 10.0 15.0 15.0 26.0 18.0 38.0 53.0 53.0 Conversion Cv Flow-rate characteristics VX212 VX222 VX232 Normally Open (N.O.) Size Port size Orifice diameter (mmo) Model Maximum operating pressure differential (MPa) 0.9 0.45 0.2 0.8 0.15 0.8 0.3 320 320 320 490 490 620 620 2 3 5 4 7 5 8 1/8, 1/4 1/4, 3/8 1/4, 3/8 1 2 3 AV (x 10.6 m2) 0.23 0.42 0.63 0.63 1.08 0.75 1.58 5.5 10.0 15.0 15.0 26.0 18.0 38.0 Conversion Cv Flow-rate characteristics VX242 VX252 VX262 Note) Weight of grommet type. Add 10 g for conduit type, 30 g for DIN terminal type, 60 g for conduit terminal type respectively. . Refer to “Glossary of Terms” on page 35 for details on the maximum operating pressure differential. 1 2 1 2 1.0 Max. system pressure (MPa) 1.0 Max. system pressure (MPa) . This valve can also be used with air. (Refer to the valve specifications for air.) For Water Single Unit Series VX21/22/23 Model/Valve Specifications N.C. Symbol N.O. Symbol 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. 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. Weight (g) Weight (g) Note) Note) Note) With no freezing 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. Fluid and Ambient Temperature Valve Leakage Rate Ambient temperature (°C) .20 to 60 Fluid temperature (°C) 1 to 60 Note) NBR (FKM) Seal material Note 2) Leakage rate (Water) Note 1) 0.1 cm3/min or less NBR (FKM) Seal material Note 2) Leakage rate (Water) Note 1) 0.1 cm3/min or less Internal Leakage External Leakage A 14