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HIGH PERFORMANCE BUTTERFLY VALVE FOR HIGHLY EROSIVE SLURRY CONTROL > BODY: In sizes 50nb to 150nb (2 to 6Ԕ) a compact wafer style ductile iron body enables easy installation. In sizes 200nb (8) and larger double flanged bodies provide a method of installation and alignment more suited to larger, heavier valves. The larger size valves have lifting points provided on the body casting. 316 stainless steel bodies are available in some smaller sizes. The Series 39 valve features blow-out proof stem protection. A retaining ring is installed between the machined stem groove and gland retainer step providing...

SINGLE OFFSET DISC: The single offset disc is the heart of the Series 39 valve. A butterfly valve disc is most prone to wear in the first 25% of opening. The single offset disc design allows the disc to open the leading edge first (left side as pictured below). This in effect causes a larger opening in the foremost position of the valve, in turn allowing the high velocity fluid the most amount of distance to recover whilst still inside the ceramic lined valve. The operating fluid is also effectively deterred from accelerating across the front face of the disc minimizing wear in regions such as...

Size Mtg Details Std Bracket Mass ins mm >

Item Name Material > 1 Body Ductile Iron ASTM A395 > Stainless Steel ASTM A351 CF8M 2 Disc Chrome-Molly Iron (Hardened) > PSZ Ceramic (Partially Stabilized Zirconia) 3 Stem 17-4 PH SS ASTM A564-Type 630 4 Liner S-SiC Ceramic (Sintered Silicon Carbide) 5 Upper Hub PSZ Ceramic (Partially Stabilized Zirconia) 6 Spacer 316 Stainless Steel ASTM A276-Type 316 7 Bearing 316 Stainless Steel with TFE & Glass Fabric Liner 8 Thrust Washer 316 Stainless Steel ASTM A276-Type 316 9 Stem Seal PTFE Rings, plus 1 x Carbon Fibre Top Ring 10 Gland Ring 316 Stainless Steel ASTM A276-Type 316 11 Retaining Ring 18-8...

PROTECTING FLANGE CONNECTION FACES: > INSTALLATION AND MAINTENANCE INSTRUCTIONS: >