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NVD 812 Non-Return Valve
Brand: Danfoss
Specifications
- Operates in any position
- 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 15 to 100)
- Closing system with back axial guiding and return spring(ND 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 Conformity Directive 97/23/CE
- PED
Enclosure, Body Material
- 304 Stainless Steel
- 316L Stainless Steel
Flange Size - 1-1/2" (DN40)
- 1-1/2" (DN40) - PN 40
Flange Size - 1-1/4" (DN32)
- 1-1/4" (DN32) - PN 40
Flange Size - 1" (DN25)
- 1" (DN25) - PN 40
Flange Size - 1/2" (DN15)
- 1/2" (DN15) - PN 40
Flange Size - 2-1/2" (DN65)
- 2-1/2" (DN65) - PN 40
Flange Size - 2" (DN50)
- 2" (DN50) - PN 40
Flange Size - 3" (DN80)
- 3" (DN80) - PN 40
Flange Size - 3/4" (DN20)
- 3/4" (DN20) - PN 40
Flange Size - 4" (DN100)
- 4" (DN100) - PN 40
Flange Size - 5" (DN125)
- 5" (DN125) - PN 40
Flange Size - 6" (DN150)
- 6" (DN150) - PN 40
Flange Size - 8" (DN200)
- 8" (DN200) - PN 40
Flow Rate
- 4.24 to 546 m³/hour (Kvs)
Materials of Construction
- 302 Stainless Steel - Clips
- 304 Stainless Steel - Closing System, Stop/Guide
- 304L Stainless Steel - Stop/Guide, Centering Collar
- 316L Stainless Steel - Stop/Guide, Closing System
- Copper - Discharge Anti-Static Braid
Media
- Glycol Solution - Drinking Water or Chilled Glycolic Water up to 50%
- Water - Circulation Water
Process Temperature
- 10° to 350° C (50° to 662° F)
Spring Material
- 302 Stainless Steel