1" Tri Clover Economy Ball Valve.  Ball valves tend to do a better job at controlling flow rates than tri clover butterfly valves.  We usually recommend butterfly valves at vessel outlets and on fermenters and tri clover ball valves on pump outlets and vessle returns like mash tun sparge and vorlauf returns. This ball valve is a 2-piece economy style valve.  It can be taken apart for cleaning and should be treated as a threaded ball valve and cleaned after each use.