Swagelok B-QC4-D-4PMK3 Quick Connect Stem Valve

Swagelok B-QC4-D-4PMK3 is a Brass Instrumentation Quick-Connect Stem with Valve, designed for 1/4 in QC4 connections and green-key (K3) mating components. This stem integrates a built-in shutoff valve, enabling inline isolation without disconnecting the line, making it well suited for instrumentation piping in lab and process environments. Made from brass for corrosion resistance and compatibility with Swagelok QC4 bodies, it carries Swagelok’s green-key designation (K3) to ensure correct pairing with green-key accessories. In typical instrumentation setups—such as analytical instrumentation lines, gas delivery, and sampling systems—the B-QC4-D-4PMK3 provides a compact, easy-to-use connection that preserves a clean flow path and allows quick disassembly for maintenance, while delivering leak-tight seals when mated to the corresponding QC4 body. For system integrity, pair this stem with a QC4 body of the same size and green-key (K3) configuration.