Control valve

3582 pneumatic valve positioners and the 3582i electro‐pneumatic valve positioner shown in figure 1 are used with
diaphragm‐actuated, sliding‐stem control valve assemblies. The pneumatic valve positioners receive a pneumatic
input signal from a control device and modulate the supply pressure to the control valve actuator. The positioner
adjusts the actuator supply pressure to maintain a valve stem position proportional to the pneumatic input signal.
3582NS positioners are designed for nuclear power applications. The 3582NS construction includes materials that
provide superior performance at elevated temperature and radiation levels. The O‐rings are EPDM (ethylene
propylene) and the diaphragms are EPDM/meta‐aramid fabric. EPDM demonstrates superior temperature capability
and shelf life over nitrile. The meta‐aramid diaphragm fabric demonstrates improved strength retention at elevated
temperature and radiation conditions
Specifications for 3582 positioners include 3582A, 3582C, 3582D, 3582G, and 3582NS unless otherwise indicated
3582—Pneumatic valve positioner with bypass and instrument, supply, and output pressure gauges.
3582A—Pneumatic valve positioner without bypass and without pressure gauges.
3582C—Pneumatic valve positioner without bypass and with automotive tire valves instead of pressure gauges.
3582D—Pneumatic valve positioner with bypass and with automotive tire valves instead of pressure gauges.
3582G—Pneumatic valve positioner without bypass and with instrument, supply, and output pressure gauges.
3582NS—Pneumatic valve positioner for nuclear service applications with or without bypass and with automotive tire
valves instead of pressure gauges.
3582i—Electro‐pneumatic valve positioner without bypass; with 582i converter; and with: supply and output pressure
gauges, automotive tire valves, or pipe plugs.
582i—Electro‐pneumatic converter with: supply and output pressure gauges, automotive tire valves, or pipe plugs.
Used for conversion of a 4‐20 mA input signal to a 0.2 to 1.0 bar (3 to 15 psig) input signal for the pneumatic valve
positioner.
3583—Pneumatic valve stem position transmitter with supply and output pressure gauges.
3583C—Similar to the 3583 valve stem position transmitter except with automotive tire valves in place of pressure
gauge