Mark 57
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CRN Registration Number Available Externally Piloted Back Pressure Regulators The Mark 57 provides accuracy that approaches that of controller-operated valves and should be considered on most critical applications before other costly, more sophisticated instrumentation. The Mark 57 is part of the sliding gate regulator offering. As with all sliding gate products, a much shorter stroke than the standard globe or plug style valve is achieved. The shorter stroke combined with the action of the pilot valve creates a faster and more accurate response (less build-up). This allows a shorter travel for the seats to reach optimal positioning, with less diaphragm movement. High turn-down ratios – up to 50:1 Sliding gate seats – Jordan Valve's pilotoperated regulators feature advanced sliding gate seat technology: –  Straight-through flow for reduced turbulence –  Short stroke for fast response and accurate regulation –  Easily interchangeable Cv's and trim sets –  Tight shutoff Due to the piloted sliding gate design, one can expect enhanced control performance in the areas of droop and rangeability. Build-up for this valve will be in the 3 - 5% range. Rangeability can be as high as 50:1. • Versatile application – for use on steam, water, air, gas and chemicals Jordan Valve a division of Richards Industries 3170 Wasson Road • Cincinnati, OH 45209 513.533.5600 • 800.543.7311 • 513.871.0105 (f) info@richardsind.com • www.jordanvalve.com Mark 57 Externally Piloted Back Pressure Regulator Operation The Mark 57 main valve and pilot are normally closed. The inlet pressure passes through the inlet pilot tubing beneath the pilot diaphragm. When the setpoint is reached, the force of the adjusting spring is overcome and the pilot valve opens. This allows the inlet pressure to enter the chamber above the main diaphragm and opens the main valve. When the pressure drops below the setpoint, the adjusting spring overcomes the force of the pressure beneath the pilot diaphragm, and the pilot and main valve close. Pressure Regulators

Mark 57 Externally Piloted Back Pressure Regulators Specifications Line Sizes: 1/2" (DN15) through 6" (DN150) End Connections • Threaded – FNPT, BSPT, BSPP – 1/2" - 2" (DN15 - 50) • Companion Flanges – 1/2" - 2" (DN15 - 50) • Integral Flanges – 2-1/2" - 6" (DN65 - 150) Body Materials • Ductile Iron • Cast Iron • Carbon Steel – A216 WCB • Stainless Steel – A351 CF8M Body Materials • Ductile Iron • Cast Iron • Carbon Steel – A216 WCB • Stainless Steel – A351 CF8M Trim Materials • 303SS – Standard on DI, CI or CS valves • 316SS – Standard on SS Valves Seat Materials • Jorcote on SST – Standard...

Mark 57 Externally Piloted Back Pressure Regulators Threaded Ends, Metric Dimensions (inches) Valve Size Flanged Ends Valve Size Flanged Ends, Metric Dimensions (inches) A

Mark 57 Externally Piloted Back Pressure Regulators Ordering Schematic Model No Size Body Mat'l Model Standard Body Material Ductile Iron Carbon Steel (WCB) Stainless Steel (CF8M) Cast Iron End Connections 1/2" - 2" Size Range PT Actuator For Metal Diaphragm Jordan Valve a division of Richards Industries 3170 Wasson Road • Cincinnati, OH 45209 513.533.5600 • 800.543.7311 • 513.871.0105 (f) info@richardsind.com • www.jordanvalve.com