These valves have revolutionized the installation of circulator pumps. Our original Isolator uni-flange ball valve design has evolved into the largest flanged ball valve program in the industry today.

Webstone The Isolator Uni-Flange Ball Valve with Drain and Purge, Series: 4041, 1 in Nominal, IPS FIP x Flanged Connection, 1 in Opening, Lever Operator, 600 lb/sq-in WOG Pressure, 100 deg F, Forged Brass, Chrome-Plated Steel Handle, Brass Packing Material, PTFE Stem Seal, PTFE Seat, Brass Stem, HCP Brass Ball Trim, 4-3/16 in L

• With adjustable packing gland nut and bolt
• Conical inlet to minimize turbulence
• Slotted holes for high velocity pumps
• Fits virtually any circulator pump

• Catalog https://assets.unilogcorp.com/267/ITEM/DOC/Webstone_H_50416HV_Catalog.pdf
• Specification Sheet https://assets.unilogcorp.com/267/ITEM/DOC/Webstone_H_40414HV_Specification_Sheet.pdf