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Series 62 Constant-Differential Relay

Brand: Siemens AG
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Series 62 Constant-Differential Relays serve as air-flow controllers maintaining a constant air purge for each setting of an integral needle valve.
Features
  • The ability to maintain constant-differential pressure drop across a built-in needle valve ensures a constant volumetric flow rate
  • Maintains constant bubbling rate in liquid level applications, eliminating the problems of typical conventional bubbling systems
  • The ability to produce reasonable purge rates eliminates the need for a supply regulator
  • Epoxy powder coating provides improved corrosion resistance

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Specifications

Brand

Ambient Temperature

  • -40° to 180° F (-40° to 82° C)
  • -40° to 160° F (-40° to 71° C) with Rotometer

Material of Construction

  • Relay: Brass, Stainless Steel, Neoprene, Aluminum, and Buna-N
  • Rotometer: Brass (Fitting), Stainless Steel, Borosilicate Glass, Aluminum, Ruby Saphire (Float), and Buna-N (O-Ring)

Purge Rate

  • 0.06 to 2.1 scfh

Supply Pressure

  • 5 to 150 psig

Rotometer Pressure

  • Maximum 200 psig (1,380 kPa)

Supply Pressure Effect

  • 0.18 scfh (Max.) Flow Change for 25 psi Increase of Supply

Documentation

Data Sheets

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