Product description
The Mark 15 Series valve positioners is a line of compact instruments which incorporates a single-axes, 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 top works of the valve, with no external levers or other exposed mechanisms. Each positioned receives a single from a control instrument, and using an air supply as high as 45 psig (3,4 bar), the positioned strokes the valve actuator to the required position.
Control Valve MK15
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)
Output
- 0 – 100% supply pressure
Air Supply Pressure
- 35 – 45 psi reverse acting 3-9 / 9-15 / 3-15 / 6-30 ranges
- 20 – 25 psi direct acting 3 -9 / 9-15 / 3-15 ranges
- 35 – 45 psi direct acting 6-30
Operating Temperature Limits
- -40°F to +180°F (-40°C to +82°C)
Air Consumption
- 0.25 scfm @ 20 psi; (0.0007N/m3 @ 1,4 bar)
Connections
- 1/4″ FNPT
Features and Benefits
- Single-axes, force-balance 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
- Direct-mounted to top of pneumatic actuator
- Offers a smaller, more streamlined package with no external linkage
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