Mark 15 Top Mounted Pneumatic Valve Positioners
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Jordan Valve, a Division of Richards Industries 3170 Wasson Road • Cincinnati, Ohio 45209 Telephone 513-533-5600 • Fax 513-871-0105 Toll-FreeTelphone: 800-543-7311 (U. S. A. & Canada) E-Mail: info@richardsind.com • URL: www.jordanvalve.com Mark 15 Top Mounted Pneumatic Valve Positioners The Mark 15 positioner uses the full force of its air supply to drive and maintain a pneumatic actuator to position a valve to what is required by control instrument, regardless of the presence of forces that change valve position. This line of compact instruments incorporates a singleaxis, force-balance principle of operation to ensure accurate and stable control valve positioning. In all cases, including bottom-loading applications, a MK15 is mounted directly on the topworks of the valve, with no external levers or other exposed mechanisms. Each positioner receives a signal from a control instrument, and using an air supply as high as 50 psig (3,4 bar), the positioner strokes the valve actuator to the required position. Like all valve positioners, the MK15 has feedback circuits designed to measure the position of the actuator’s piston or diaphragm. The positioner then supplies or exhausts air to bring the actuator within the required range for its corresponding control instrument. The position of the valve actuator is sensed by the amount of compressive force exerted by a spring on the valve positioner’s diaphragm assembly. By selecting the appropriate spring from the wide selection available almost any combination of valve stroke (from 1/4” to 4”; 6,4mm to 102mm) and instrument spans of 6,12, and 24 psi (0,4, 0,8 and 1,7 bar) can be obtained. Valve Positioners Mark 15 Top Mounted P/P Positioners FEATURES • Single-axis, force-balance principle of operation, ensures accurate and stable positioning • Feedback circuits direct the actuator’s position, ensuring adherence to the control instrument signal • Accommodates a wide variety of valve strokes and instrument spans • Can be direct-mounted to top of pneumatic actuator • Offers a smaller, more streamlined package with no external linkage

MK15/1205/10K/AB MK15 TOP MOUNTED PNEUMATIC VALVE POSITIONERS SPECIFICATIONS • Input: 3-15, 6-30, 3-9 or 9-15 psi (0,2-1,0; 0,4-2,1; 0,2-0,6; or 0,6-1,0 bar ) Air Supply Pressure Minimum: 3 psi (0,2 bar) above required actuator pressure Maximum: 50 psi (3,4 bar), or as limited by actuator Valve Travel Minimum: 1/16” (1,6 mm) Maximum: 4” (102mm) • Output: 0-100% supply pressure • Operating Temperature Limits: -40°F to +180°F (-40°C to + 82°C) • Air Consumption (@20 psi): 0.25 scfm; (@ 1,4 bar: 0.0007N/m3) • Flow Capacity: 4.4 scfm (0.125N/m3) (for 3-15 psi output pressure change) (0,2-1,0...