Foxboro Eckardt SRD991 Intelligent Positioner

The intelligent positioner SRD991 is designed to operate pneumatic valve actuators and can be operated from control systems (e.g. the Foxboro I/A Series System), controllers or PC-based configuration- and operational tools such as PC20 / IFDC or PC50 (FDT Software). The positioner is available with different communication protocols.

The multi-lingual full text graphical-LCD in connection with the 3 push buttons allows a comfortable and easy local configuration and operation as well as the display of valve specific data, and status- and diagnostic messages.

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Features of Foxboro Eckardt SRD991 Intelligent Positioner

  • Stroke 8 to 120 mm / 260 mm (0.3 to 4.7 in / 10.2 in)
  • Angle range up to 95 °
  • Supply air pressure up to 6 bar (90 psig),with spool valve up to 7 bar (105 psig)
  • Single or double-acting
  • Mounting on linear actuators according to NAMUR
  • Mounting on rotary actuators acc. to VDI/VDE 384
  • Protection class IP 65, NEMA 4X
  • Explosion protection: Intrinsic safety according to ATEX and FM/ CSA

Specification of Foxboro Eckardt SRD991 Intelligent Positioner

  • Stroke range . . . 8 to 260 mm (0.3 to 10.2 in)with standard feedback levers; special levers on
  • Rotation angle range . . . up to 95° without mechanical stop
  • Supply air pressure . . . . . . . 1.4 to 6 bar (20 to 90 psig) with spool valve 1) . . . . . . 1.4 to 7 bar (20 to 105 psig)
  • Output to actuator . . . . . . . . 0 to ~100 % of supply air
  • pressure (up to 5.5 bar at 6 bar supply air pressure)
  • with spool valve heavy duty2): 4 to 10 bar
  • Air supply. . . . . . . . . . . . . . . according to ISO 8573-1
  • – Solid particle size and density class 2
  • – Oil rate. . . . . . . . . . . . . . . class 3

 

 

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