Zilmet ZU0020 Multi Isolation Valve 1/2" NPT

The Zilmet ZU0020 Multi Isolation Valve controls fluid flow in hydronic heating systems, featuring 1/2-inch NPT threaded connections that integrate with piping networks serving boilers, expansion tanks, and circulator assemblies. It allows separation of system lines such as inlet flow, expansion vessel, and circulation loop without draining the entire setup. It is placed in HVAC systems such as boilers, radiant heating networks, and closed-loop hydronic circuits that provide independent section control, improved operational access, reduced system downtime, stable hydraulic separation, and accurate flow isolation. Sealing elements create a leak-tight closure against system pressures, preventing fluid migration during maintenance intervals.