Confirm the exact configuration
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

SMC
The SMC 21-VV5Q21-04 is an official catalog model belonging to the 10/21-VQ Clean Room Valve series featuring a clean series designation of 10 and 21 for copper, fluorine, and silicon-free construction with low particle generation. This VV5Q21 configuration supports multiple stations, cylinder port options including C4, C6, C8, and 01 thread sizes, alongside various cabling kits and operational options such as back pressure check valves and DIN rail mounting styles. Submit the exact part number, quantity, and application requirements to receive an official quote for this SMC component.
Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued SMC references — within one business day.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against SMC 21-VV5Q21-04. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.