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Custom Built FISCHER Differential Pressure Switch model no DS1302VAYYYD0064

ALVI  Automation – India (http://www.alviautomation.com) offers Custom Built FISCHER/Germany Differential Pressure Switch model no DS1302VAYYYD0064

Principles of Operation

This differential pressure instrument is based on a rugged and uncomplicated diaphragm movement, suitable for overpressure, partial vacuum and differential pressure measurements. The system’s operating principle is identical for all applications of this type. In a state of balance, forces of springs on both sides of diaphragm are balanced. The Pressure or differential pressure to be measured creates an unbalanced force of springs for measuring range until a new balance is reached. When subjected to excessive pressure, the diaphragm rests on metal supporting plates. A centre-mounted tappet transfers motion of the diaphragm system to indicator movement and to initiating elements of the microswitches.

General Specifications : 

  • Measuring range : 0… 400 mbar up to 0… 25 bar (see ordering code)
  • Nominal pressure : 25 bar
  • Max. static operating pressure : acc. to measuring range (see ordering code)
  • Max. pressure load : one-sided overpressure protected up to nominal pressure on (+) – and (-) side of diaphragm, partial vacuum protected
  • Perm. ambient temperature : -10… +70°C
  • Perm. medium temperature : 70°C
  • Protection class : IP 54 acc. to DIN EN 60529
  • Mounting position : as desired
  • Measuring accuracy  : ± 2.5% FS
  • Zero adjustment : located in the dial

Measuring System

  • Measuring ranges < 16 bar : diaphragm measuring system, diaphragm of fabric back stayed elastomer
  • Measuring range 0-25 bar : diaphragm measuring system, diaphragm of DURATHERM®

Switching Elements

  • Contact output : 1 or 2 microswitches, 1-channel change-over contacts
  • Adjustment of switching points : external adjustment by standard value scales smallest adjustable value: approx. 5% FS
  • Switching hysteresis : approx. 2.5% FS
  • Load data / contacts : U ~ max. = 250 V AC, I max. = 5 A, P max. = 250 VA
    U = max. = 30 V DC, I max. = 0.4 A, P max. = 10 W
  • Electrical Connection : numbered cable, prewired terminal box, 7-channel plug
  • Pressure Connection : thread G1/4 female, cutting ring connection for 6, 8, 10,12 mm tube of brass, zinced steel or chrome nickel steel connection shank G1/4 male DIN EN 837

Materials

  • Pressure chamber : aluminium GkAlSi10(Mg), varnished black
    aluminium GkAlSi10(Mg) HART-COAT® chrome nickel steel 1.4305
  • Measuring diaphragm : diaphragm measuring system and gaskets of NBR or Viton®, diaphragm of DURATHERM® NiCrCo-alloy
  • Materials: medium : stainless steel 1.4310, 1.4305
  • Materials: housing : macrolon
  • Weight : pressure chamber of Al = 1.2 kg, pressure chamber of 1.4305 = 3.5 kg
  • Mounting : pipe mounting, pressure connections = (+), (-) symbols
    • by screwed-in cutting ring or clamping ring connection
    • by screwed-in connection shank acc. to DIN EN 837 for nipple fitting acc. to DIN 16288
    wallmounting
    • 3 fastening elements

For more info Click here to access the datasheet