... Keystone Series GRF (ISO) Resilient Seated Butterfly Valve . Top and bottom bearings absorbs side thrust loads. Other Keystone Butterfly Valves we can provide include: Keystone Fig.

A complete butterfly valve line to provide optimal performance Our complete range of butterfly valves extends from general purpose to severe service models used for isolation and throttling applications. Keystone Butterfly Valves Figure AR1/AR2 General Purpose Valve KEYSTONE SERIES GR RESILIENT SEATED BUTTERFLY VALVES GRW/GRL MATERIAL SPECIFICATION Part name Material Material specification Remark DN 50-300 Body Ductile iron ASTM A536 Gr 65-45-12 Disc Super duplex ASTM A890 Gr 5A 316 stainless steel ASTM A351 Gr CF8M 304 stainless steel ASTM A351 Gr CF8 Aluminium bronze ASTM B148 UNS C95200 AR1/AR2 Butterfly Valves (replaceable seats), Keystone Fig. 129/139 Butterfly Valves (Naval & Marine MIL SPEC V-22 133C), Keystone Fig. An economical bonded resilient seated butterfly valve for bi-directional and end-of-line service• F221 Wafer style valve• F222 Lugged style valve Features Bubble tight shut-off at full rated pressure in both directions. 920 Lug Style Two-Piece Butterfly Valves (replaceable seats), Keystone Fig. See Table 1 for tabulated Cv’s for the Figure AR1/AR2 Butterfly Valve. through the valve. A split body thin disc valve for high flow and modulating serviceFigure 990 - Wafer body designFigure 920 - Lugged body design Features bstruction to flow, resulting in highest Cv, lowest pressure drops and best control characteristics. The higher the Cv, the greater the flow and the better the control characteristics. 360/362 & 370/372 K-LOK High Performance Butterfly Valves (150 & 300 PSI; Fire-Safe Option for Temperatures … With a tradition of more than 70 years, Keystone built its reputation on providing industrial process butterfly valves known for their reliability, long service life, and reduced operating costs. Manual & automated Resilient Seated, High Performance & Triple Offset butterfly valves engineered for reliability and backed by over 30 years of proven performance. Independent, third-party life-cycle testing has shown that Keystone resilient-seated butterfly valves last 2.5 times longer than competitors' butterfly valves. The F222 lugged version is suitable for bi-directional end-of-line service at full pressure rating.

Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life and tight shut-off. Throttling characteristics are shown in the same manner with Cv’s at the various disc openings.