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NON RETURN VALVES LL
venturi type NON RETURN VALVES 7
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.
special features Mod. 7211-7216
• 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 Mod. 7221-7226
Body: DN L Weight (kg)
Cast iron, GJL 250 UNI EN 1561 (former to DIN GG25)
for PN 10/16 and DN 40-50 PN 25/40 PN 10 PN 16 PN 25 PN 40 PN 64
Ductile iron, GJS 400-15 UNI EN 1563 (former to DIN
GGG40) for other DN and PN 40 120 7 7 7 7 12
Ogive: 50 120 7 7 7 7 12
Brass CuZn40Pb2 for DN 40-100 PN 10/16/25/40/64
Cast iron, GJL 250 UNI EN 1561 (former to DIN GG25) 65 150 11 11 11 11 16
for DN 125-400 PN 10/16
Ductile iron, GJS 400-15 UNI EN 1563 (former to DIN 80 180 17 17 17 17 21
GGG40) for other DN and PN in single block execution
Aluminium for two parts body execution 100 240 23 23 27 27 34
Shutter: 125 300 33 33 40 40 53
Stainless steel 1.4301/ EN ISO10088 (correspondent
to AISI304) for DN 40-150 PN 10/16 150 350 45 45 54 54 75
Cast iron, GJL 250 UNI EN 1561 (former to DIN GG25)
for DN 200-600 PN 10/16 200 400 75 75 100 106 125
Ductile iron, GJS 400-15 UNI EN 1563 (former to DIN
GGG40) for other DN and PN 250 450 115 115 130 220 280
Seat on body and counter seat on shutter: 300 500 135 145 170 300 420
Stainless steel 1.4301/ EN ISO10088
(correspondent to AISI304) 350 600 210 220 390 440 -
Stem: 400 700 300 315 480 520 -
Stainless steel 1.4301/ EN ISO10088
(correspondent to AISI304) 450 750 465 490 600 670 -
Spring:
Stainless steel 1.4301/ EN ISO10088
(correspondent to AISI304)
Guide bushes:
Brass CuZn40Pb2
500 850 720 780 940 1050 -
600 1000 830 900 990 - -
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.
info@raci.it - www.raci.it - Tel. +39 02 262.351 7.1 © RACI srl - ISO 9001 - Catalog Ed 10/2016
