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Series 63 Constant-Differential Relay

Brand: Siemens AG
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Series 63 Constant-Differential Relays are used in conjunction with an external needle valve to provide constant volume flow rates of liquids or gases over a continuously adjustable range.
Features
  • Versatile and design accommodates liquids or gases and wide range of OEM needs 
  • Powder coating provides improved corrosion resistance
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Series 63 Constant-Differential Relays are used in conjunction with an external needle valve to provide constant volume flow rates of liquids or gases over a continuously adjustable range.
Features
  • Versatile and design accommodates liquids or gases and wide range of OEM needs 
  • Powder coating provides improved corrosion resistance
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Specifications

Brand

Ambient Temperature

  • Model 63BU, 63BUL, 63BD & 63BDL: -40° to 180° F (-40° to 82° C)
  • Model 63SU, 3SUL, 63SD & 63SDL: -40° to 250° F (-40° to 121° C)

Body Material

  • Brass
  • 316 Stainless Steel

Material of Construction

  • Valve Plunger & Seat: 303 Stainless Steel, 316 Stainless Steel
  • Plunger Spring: 316 Stainless Steel, Phos. Br.
  • Disphragm: Neoprene, Kynar
  • Differential Spring: 18-8 Stainless Steel, 316 Stainless Steel

Supply Pressure

  • 50 to 500 psig

Range Limit

  • Model 63BU & 63SU: 0.01 to 1.1 scfm @ 20 psig Supply
  • Model 63BUL & 63SUL: 13 to 2,800 sccm @ 20 psig Supply
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Documentation

Data Sheets

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