Italy

bullet acquedottoNON RETURN VALVES VENTURI TYPE


MOD. 7211| PN 10/16  | DN  40-400|
MOD. 7212| PN 25       | DN  40-300|
MOD. 7214| PN 40       | DN  40-200|
MOD. 7216| PN 64       | DN  40-200|
Flanged non return valve, single block body.

MOD. 7221| PN 10/16  | DN 450-600|
MOD. 7222| PN 25       | DN  350-600|
MOD. 7224| PN 40       | DN  250-600|
MOD. 7226| PN 64       | DN  250-300|
Flanged non return valve, body in two parts.

 valvole di non ritorno tipo venturi 1

valvole di non ritorno tipo venturi 2

 

 

 

 

 

SPECIAL FEATURES:

  • Non return valve with shutter ogive and contrast spring designed to take the advantages of Venturi effect.
  • Low head losses and noiseless thanks to inner profile.
  • From DN 40 to DN 250 PN 10-16-25 single block body version, from DN 250 and for big working pressure PN 40 and PN 64 reinforced version with body composed by two parts assembled by steel fasteners.
  • Body high quality EPOXY powder coated.

MATERIALS:

Body:
Cast iron, GJL 250 UNI EN 1561 (former to DIN GG25) for PN 10/16 and DN 40-50 PN 25/40
Ductile iron, GJS 400-15 UNI EN 1563 (former to DIN GGG40) for other DN and PN

Ogive:

Brass CuZn40Pb2 for DN 40-100 PN 10/16/25/40/64
Cast iron, GJL 250 UNI EN 1561 (former to DIN GG25) for DN 125-400 PN 10/16
Ductile iron, GJS 400-15 UNI EN 1563 (former to DIN GGG40) for other DN and PN in single block execution
Aluminium for two parts body execution

Shutter:

Stainless steel 1.4301/ EN ISO10088 (correspondent to AISI304) for DN 40-150 PN 10/16
Cast iron, GJL 250 UNI EN 1561 (former to DIN GG25) for DN 200-600 PN 10/16
Ductile iron, GJS 400-15 UNI EN 1563 (former to DIN GGG40) for other DN and PN

Seat on body and counter seat on shutter:
Stainless steel 1.4301/ EN ISO10088 (correspondent to AISI304)

Stem:

Stainless steel 1.4301/ EN ISO10088 (correspondent to AISI304)

Spring:

Stainless steel 1.4301/ EN ISO10088 (correspondent to AISI304)

Guide bushes:
Brass CuZn40Pb2

 

 

valvole di non ritorno tipo venturi 3

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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