Resideo V8043F1028 Valve

Valve, Zone, 2 Way Normally Closed, 1/2', 12', Sweat, 24Vac,, 1/2" sweat two-way normally closed zone valve, 24v, spring return to close, brass body, stainless steel stem, brass seat,screwed terminal block , manual opener, 20 pound maximum closeoff pressure, normally open auxiliary switch, 3.5cv