Danfoss 2-Way Valve, VFGS 2
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VFGS 2 2-Way Valve

Brand: Danfoss
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The controller is a self-acting pressure reduction controller primarily for use in district heating systems. The controller is normally open and closes on rising differential pressure.

The controller has a control valve, an actuator with one control diaphragm and a spring for pressure setting.

Further on valve versions are available:
  • VFGS 2 for steam, with metallic sealing cone

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Specifications

Brand

Applications

  • Used in District Heating Systems

Approvals & Certifications

  • EN 1092-1 - for PN 40 Flange
  • EN 1092-2 - for PN 16 & 25 Flanges

Cone Material

  • 420 Stainless Steel (1.4021)
  • CA 6-NM Stainless Steel (1.4313)

Connection Style

  • Flange

Diaphragm Material

  • EPDM

Differential Pressure

  • psi: 145 to 290.1 (kPa: 1,000 to 2,000, bar: 10 to 20)

Enclosure, Body Material

  • Cast Steel GP240 GH (GS-C 25) - Valve PN 40
  • Ductile Iron EN-GJS-400 (GGG-40.3) - Valve PN 25
  • Grey Cast Iron EN-GJL-250 (GG-25) - Valve PN 16

Flange Size - 1-1/2” (DN 40)

  • 1-1/2” (DN 40) - PN 16
  • 1-1/2” (DN 40) - PN 25
  • 1-1/2” (DN 40) - PN 40

Flange Size - 1-1/4” (DN 32)

  • 1-1/4” (DN 32) - PN 16
  • 1-1/4” (DN 32) - PN 25
  • 1-1/4” (DN 32) - PN 40

Flange Size - 1” (DN 25)

  • 1” (DN 25) - PN 16
  • 1” (DN 25) - PN 25
  • 1” (DN 25) - PN 40

Flange Size - 1/2” (DN 15)

  • 1/2” (DN 15) - PN 16
  • 1/2” (DN 15) - PN 25
  • 1/2” (DN 15) - PN 40

Flange Size - 10” (DN 250)

  • 10” (DN 250) - PN 16
  • 10” (DN 250) - PN 40

Flange Size - 2-1/2” (DN 65)

  • 2-1/2” (DN 65) - PN 16
  • 2-1/2” (DN 65) - PN 25
  • 2-1/2” (DN 65) - PN 40

Flange Size - 2” (DN 50)

  • 2” (DN 50) - PN 16
  • 2” (DN 50) - PN 25
  • 2” (DN 50) - PN 40

Flange Size - 3” (DN 80)

  • 3” (DN 80) - PN 16
  • 3” (DN 80) - PN 25
  • 3” (DN 80) - PN 40

Flange Size - 3/4” (DN 20)

  • 3/4” (DN 20) - PN 16
  • 3/4” (DN 20) - PN 25
  • 3/4” (DN 20) - PN 40

Flange Size - 4” (DN 100)

  • 4” (DN 100) - PN 16
  • 4” (DN 100) - PN 25
  • 4” (DN 100) - PN 40

Flange Size - 5” (DN 125)

  • 5” (DN 125) - PN 16
  • 5” (DN 125) - PN 40

Flange Size - 6” (DN 150)

  • 6” (DN 150) - PN 16
  • 6” (DN 150) - PN 40

Flange Size - 8” (DN 200)

  • 8” (DN 200) - PN 16
  • 8” (DN 200) - PN 40

Flow Rate

  • 4 to 630 m³/hour (Kvs)

Materials of Construction

  • 316Ti Stainless Steel, 1.4542 - Bellows

Media

  • Steam

Mounting Position

  • Any Position for DN 15 to 80 Tmax ≤ 120° C (248° F)
  • Horizontal for DN 15 to 80 Tmax > 120° C (248° F), DN 100 to 250

Nominal Pressure

  • psi: 232.1 to 580.2 (kPa: 1,600 to 4,000, bar: 16 to 40)

Process Temperature

  • 2° to 350° C (35.6° to 662° F)

Seat / Seal Material

  • Sealing: Metal
  • Valve Seat: 420 Stainless Steel (1.4021)

  • District Heating Systems

Documentation

Data Sheets

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