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NVD 802 Non-Return Valve
Brand: Danfoss
Specifications
- Operating position: horizontal and vertical
- Easy to install and dismantle, space-saving
- Minimum head loss
- Does not generate hammering
- Closing system: disc with parabolic edges with return spring; lateral guiding by 3 or 4 ribs (DN 32 to 100)
- Closing system with back axial guiding and return spring (DN 125 to 200)
- Metal/metal seal (machined trim)
- Using these check valves on networks equipped with piston pumps or compressors is not recommended
Specifications
Brand
Approvals & Certifications
- CE
- PED 97/23/EC
Enclosure, Body Material
- Cast Iron
- DZR Brass
- Epoxy
Flange Size - 1-1/2" (DN40)
- 1-1/2" (DN40) - PN 16
- 1-1/2" (DN40) - PN 6
Flange Size - 1-1/4" (DN32)
- 1-1/4" (DN32) - PN 16
- 1-1/4" (DN32) - PN 6
Flange Size - 2-1/2" (DN65)
- 2-1/2" (DN65) - PN 16
- 2-1/2" (DN65) - PN 6
Flange Size - 2" (DN50)
- 2" (DN50) - PN 16
- 2" (DN50) - PN 6
Flange Size - 3" (DN80)
- 3" (DN80) - PN 16
- 3" (DN80) - PN 6
Flange Size - 4" (DN100)
- 4" (DN100) - PN 16
- 4" (DN100) - PN 6
Flange Size - 5" (DN125)
- 5" (DN125) - PN 16
Flange Size - 6" (DN150)
- 6" (DN150) - PN 16
Flange Size - 8" (DN200)
- 8" (DN200) - PN 16
Flow Rate
- 18 to 546 m³/hour (Kvs)
Materials of Construction
- 304L Stainless Steel - Stop Guide
- 316L Stainless Steel - Closing System, Stop Guide
- Cast Iron - Closing System, Stop Guide
- Epoxy - Closing System, Stop Guide
Media
- Glycol Solution - Drinking Water or Chilled Glycolic Water up to 50%
- Water - Circulation Water
Process Temperature
- 10° to 200° C (50° to 392° F)
Ring Material
- Bronze
Spring Material
- 302 Stainless Steel