Spirax-Sarco 687441 Three-Port Control Valve DN80

Spirax-Sarco QLM QLD Series Three-Port Control Valve, part number 687441, in 3" DN80 size, is a three-port liquid-flow control valve designed for process piping where a single inlet can feed two outlets. As a member of Spirax-Sarco's QLM/QLD family, the valve supports mixing or diverting service depending on the internal plug and seat arrangement, enabling the flow to be directed to or combined from ports A and B as required. The 3" DN80 footprint aligns with mid-range piping in many industrial liquid systems, offering a compact, two-way routing solution for precise flow distribution. In three-port configurations, the valve's behavior—whether it mixes flows or diverts a portion of the stream—depends on the trim and installation, a general characteristic described by Spirax-Sarco for three-port valves.