Italy

bullet acquedottoAIR VALVES COMBINATI ON TYPE FROM DUCTILE IRON AND PA


MOD. 5371 | PN 16 | DN 50-250
MOD. 5372 | PN 25 | DN 50-250
Flanged connection, stainless steel fasteners.

 

 valvole di sfiato combinato ghisa composite 1

valvole di sfiato combinato ghisa composite 2

valvole di sfiato combinato ghisa composite 3

valvole di sfiato combinato ghisa composite 4

 

 

SPECIAL FEATURES:

  • Double orifice type, fully automatic triple function for releasing air during pipe filling and bringing air in (anti-vacuum) during pipe emptying, releasing air under pressure.
  • Kinetic function carried out by ductile iron unit, air releasing under pressure executed by PA unit.
  • Performances according to the requirements of EN 1074.
  • Body and cover high quality polyamide (Rilsan – PA11) powder coated (fusion bonded), coating thickness DFT min. 250 micron, zero porosity (tested with 3000V), high impact resistance and cross-linkage according to DIN 30677-2 and DIN 3476.
  • Floats from non-corrosive material.
  • Body provided with threaded drilling for discharging ball valve connection (available on request).
  • Flanged connection with multi-size universal drilling to reduce stock variances (DN 50-65 PN 16-25; DN 80 PN 16-25 and DN 100 PN 16-25).
  • From DN150 slip-on flange version: versatility and orientation changing on field option.
  • Inner basket (up to DN80) or special guides into body casting (from DN150) to keep float in optimal position during operation.
  • Minimum operating pressure for watertight: 0,5 bar.

>> PERFORMANCES:
FUNCTIONAL DIAGRAMS

MATERIALS:

Body and cover:
Kinetic unit - Ductile iron EN-GJS-400-15 / EN 1563 (former to DIN GGG40)
Air release unit - Polyamide PA fibre glass reinforced

Float:
Kinetic unit - Up- to DN80: polyamide, fully EPDM rubber lined – PN10/16 or stainless steel 1.4301/ EN ISO10088 (equivalent to AISI304), fully rubber lined (DN 50/65)
PN 25 From DN100: stainless steel 1.4301/ EN ISO10088 (equivalent to AISI304) Air release unit - Polypropylene foam

Seat:
Brass CuZn40Pb2

Seat sealing:
Outlined EPDM rubber, potable water approved

Basket:
ABS

O-Rings:
EPDM rubber, potable water approved

Gasket air release unit:
Silicone, potable water approved

Bolts/nuts/washers:
Stainless steel A2-70 / EN ISO 3506.
Stainless steel A4-70 on request

Plug:
Galvanised malleable iron, or stainless steel on request

 

valvole di sfiato combinato ghisa composite 5

All metal, rubber, and coatings used have been designed for contact with water for human consumption, pursuant to the terms of Italian Health Ministry decree n° 174, dated 6/4/2004.

 

 


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RACI Srl

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