Flow-rate Characteristics Port size (Nominal diameter) Body material Orifice diameter (mmo) Min. operating pressure differential Note 1) (MPa) Max. operating pressure differential (MPa) AC DC 0 1.0 1.5 Model Max. system pressure (MPa) 10 15 20 25 0.7 1.0 Aluminum Resin C37, Stainless steel C [dm3/(s・bar)] b Cv . 185 400 720 1100 . 1300 Flow-rate characteristics Normally Closed (N.C.) N.C. Fluid and Ambient Temperature 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 20 for the selection. Note 3) When the product is used with low vacuum (to 133 Pa.abs), give caution to the external leakage outlined above. NBR (FKM) Note 2) Seal material Leakage rate (Air) Note 1) 15 cm3/min or less (Aluminum body type) 15 cm3/min or less (Resin body type) 1 cm3/min or less (Metal body type) NBR (FKM) Note 2) Seal material Leakage rate (Air) Note 1) 15 cm3/min or less (Aluminum body type) 15 cm3/min or less (Resin body type) 1 cm3/min or less (Metal body type) Weight (g) For Air Effective area (mm2) Note) Dew point temperature: .10°C or less Ambient temperature (°C) .20 to 60 Fluid temperature (°C) .10 Note) to 60 External Leakage Symbol 6.2 5.3 8.0 8.5 9.3 23.0 36.0 0.38 0.44 0.43 0.34 0.26 1.7 1.2 2.0 2.4 2.6 6.0 9.4 o10 o3/8" o12 1/4 (8A) 3/8 (10A) 1/2 (15A) 3/4 (20A) 1 (25A) VXZ230 VXZ240 VXZ250 VXZ260 Note 1) The operation of the valve may be unstable due to the capacity of the pressure supply source such as pumps and compressors or the pressure loss by the orifice of piping. Please contact SMC to check if the required valve size can be used in the application. Please contact SMC for the compatibility of the circuit flow and valve size. (Refer to page 23.) Note 2) Weight of grommet type. Add 10 g for conduit, 30 g for DIN terminal, and 60 g for conduit terminal type respectively. !Refer to “Glossary of Terms” on page 30 for details on the max. operating pressure differential. 2 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. . Can be used with low vacuum (up to 133 Pa.abs). Note 2) 4 Series VXZ