RATERMANN Cryogenics T (844) 341-3433 S F (844) 341-3444 S Website: www.rmicryo.com S Email: [email protected] 37M-2 Series 51/52 Flanged Ball Valves Series 51/52 Flanged Ball Valves F lowserve’s Series 51/52 is a standardized line of flanged ball valves in sizes 1/2"–10" with flange ratings of ANSI Class 150 and 300. The combination of elements of this standardization provides a manually operated or automated valve which exceeds the production requirements of your process. Such requirements include high-cycle operation, pressure integrity, material compatibility, speed of operation, automatic control and high temperature endurance. Tight Shutoff Series 51/52 valves are two-way flow ball valves designed to seal bi- directionally against resilient seats. The ball is forced downstream under pressure against the downstream seat to effect and maintain a seal. The resiliency of the seats is a result of design as well as the characteristics of materials used. Consequently, the valve will give bubble-tight shutoff throughout a long service life. The seats are also designed to perform a wiping action during each cycle. This wiping action cleans foreign materials off both the seat and ball, assuring leak-tight sealing. A pair of seats with relief slots makes downstream sealing possible. The result is less friction, lower operating torque, less seat wear, and longer service life. The seats also permit the valve to operate at a higher pressure differential with lower torques than double- sealing valves in which there is sealing between both seats and the ball. Downstream sealing prevents seat damage and lowers operating torque while providing full bidirectional capability. The Flowserve design results in smoother, more efficient valve operation. Leak-Tight Stem Design Flowserve’s Series 51/52 valves outperform globe and gate valves. Not only are they easier to automate, best of all, they won’t leak as sliding stem valves often do. The no-leak rotary stem seal features a bottom- entry, adjustable, self-compensating stem design. A hole in the ball’s stem slot prevents any possibility of damage due to trapped cavity pressure when the ball is open. The stem seal package consists of one or two thrust washers and one or a series of stem seal rings, depending on valve size. On 1/2"–2" valves, a pair of Belleville washers acts as a spring to compensate for wear and thermal expansion. On larger valves, the deep stuffing box with additional packing provides resiliency. S Designed to Automate, Control, Contain and Shut Off Your Process TOP VIEW Performance to Match Your Process A wide variety of body, seat and seal materials coupled with advanced seat technology means dependable, high-cycle control on steam, petroleum products, chemicals, and abrasive liquids. Series 51/52 flanged ball valves are used for manual on/off operation with lever handles or gear operators. They are also easy to automate pneumatically or electrically. In addition, these valves can be very flexible in operation. You can open and close them as frequently as necessary and at any speed you choose. Closing too rapidly, however, may cause pressure shock (hammer) in the piping system. As for special applications, Flowserve can provide flanged valves to handle them. Special applications include toxic chemicals, cryogenics, viscous fluids, vacuum sealing, chlorine, steam and high-cycle production. For the Series 51/52 solution to your control problems, contact your local Worcester Controls stocking distributor or area sales manager. • One-Piece Body Construction • High-Cycle Stem Seals • Compact, Safe, Blowout-Proof Stem • Smooth, Two-Way Flow Path • Seat Design Downstream Sealing • Separate Body Seal • 150# or 300# ANSI Flanges • Pre-Drilled Mounting Pad For Actuation
