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.

Festo
This Festo 4451866 industrial component is a 3-way mechanical ball valve featuring an L bore, a soft sealing principle, and an Rp3/4 fitting connection based on EN 10226-1 and ISO 5211 norms. Engineered with a nominal width DN of 20, a nominal pressure PN of 40, and an inside diameter of 17.6 mm, it supports reversible flow directions for compressed air, inert gas, water without water vapor, and neutral liquids across a medium temperature range of -20 °C to 130 °C. The unit includes an F03 flange hole pattern, an 8 Nm breakaway torque at nominal pressure, a flow rate Kv type L of 41 m³/h, and a slot direction matching the flow direction for switching position indication. Submit the exact part number, quantity, and application requirements for a formal quotation.
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 Festo 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 Festo 4451866. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.