Control Valve Study Bench

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Control-Valve-Study-Bench

Product Code: AEMM007

Control Valve Study Bench Manufacturer

Teaching objectives

  • Determination of the experimental KVS of the valve with and without positioner.
  • Drawing and study of the curves.
  • Intrinsic features of the valve.
  • Qv = f(control) at constant head loss.

Feature of the installed valve :

  • Qv and ΔP = f (control).
  • Function of the positioner and phenomenon of hysteresis.

Functioning

  • A pneumatic servomotor valve is supplied by the water network via a needle control valve. The flow is measured by a rotameter. A regulator allows to adjust the pressure of the network.
  • The difference of pressure between the upstream and downstream of the control valve is measured with the help of a differential pressure transmitter with local display.
  • The influence of the positioner on the answer of the valve is determined with the help of a current generator (4/20 mA) allowing the control of the control valve servomotor via an I/P converter (0,2 to 1 bar) or via a pneumatic electro-positioner.
  • The device is mounted on a welded stainless steel frame, equipped of 4 adjustable feet.

Technical specifiations

  • A regulator 0-3 bar of the water supply circuit with manometer.
  • A needle flow adjusting valve made of stainless steel.
  • A pneumatic needle control valve with variable Cv made of stainless steel.
  • An electro-positioner.
  • A regulator, with air oil separator and manometer.
  • A differential pressure transmitter with local display and bleeding manifold.
  • A rotameter (scale 60 to 600 l/h).
  • An electrical cabinet, IP 55, including .
  • A padlocked main switch.
  • A ON light.
  • An emergency stop button with key.
  • A current generator (4/20 mA) with potentiometer and indicator.
  • Control signal output by safety plugs.
  • Technical manual in English

Essential requirements

  • Power supply: 230 V, 50 Hz, 250 W
  • Compressed air: 6 bar, 3 Nm3/h.
  • Water: network clean water 3 bar, 20 °C, 1000 l/h.

Dimensions

  • 850 x 425 x 940 mm
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