Flowserve NAF-Check Non Return Check Valves - Manual

A
2
Non-Return Valves
PN 10 –
0 100
DN 40 – 1000
(1½" – 40")
NAF-CHECK
NAF-Check
Non-Return Valves
PN 10 – 0 100
DN 40 – 1000 (1½" – 40")
Issue date: 12/99
Application
for liquids, gases, vapours, corrosive fluids
and low temperatures.
Pressure/Temperature Rating
■ Wafer-type valve for sandwiching
between flanges
■ Short overall length acc. to DIN EN 558-1,
series 16 (=
^ ISO 5752)
■ Suitable for flanges to DIN, BS and ANSI ²) Max. service temperature for valve with spring: + 300 °C (572 °F)
Types
Type PN DN Max. service pressure in [bar g] and [psig]
526 822 / 32 100 65 – 400 0 100 0 100 0 100 0 100 0 100 0 100 0 100 00 97 00 85 0 54 0 37
2½" – 16" 1450 1450 1450 1450 1450 1450 1450 1407 1233 783 537
Related temperature 2 ) °C 00 20 0 100 0 150 0 200 0 250 0 300 0 350 0 400 0 450 500 525
°F 00 68 0 212 0 302 0 392 0 482 0 572 0 662 0 752 0 842 932 977
High-temperature steel at – 10 °C and nominal pressure
Type PN DN (mm) Max. service pressure in [bar g] and [psig]
528 620 / 30 40 40 – 250 0 40 0 33 0 31 0 29 0 28 0 26 0 26 - 0 - 0 - 0 - 0
1½" – 10" 580 479 450 421 406 377 377 - 0 - 0 - 0 - 0
528 520 / 30 25 300 – 1000 0 25 0 20 0 19 0 18 0 17 0 16 0 16 - 0 - 0 - 0 - 0
12" – 40" 363 290 276 261 247 232 232 - 0 - 0 - 0 - 0
Related temperature 2 ) °C 0 20 100 150 200 250 300 350 400 450 500 525
°F 0 68 212 302 392 482 572 662 752 842 932 977
Stainless Steel at – 40 °C and nominal pressure
Type PN DN (mm) Max. service pressure in [bar g] and [psig]
526 620 / 30 40 40 – 250 0 40 0 40 0 40 0 38 0 36 0 32 0 25 0 18 0 11 - 0 - 0
1½" – 10" 580 580 580 551 522 464 363 261 160 - 0 - 0
526 520 / 30 25 300-1000 0 25 0 25 0 25 0 24 0 22 0 20 0 15 0 11 00 6 - 0 - 0
12" – 40" 363 363 363 348 319 290 218 160 0 87 - 0 - 0
Related temperature 2 ) °C 20 100 150 200 250 300 350 400 450 500 525
°F 68 212 302 392 482 572 662 752 842 932 977
Steel at – 10 °C and nominal pressure
Type PN DN (mm) Version
526 822 40 – 100
65 – 400¹)
without spring
2½" – 16"
526 832 40 – 100
65 – 400¹)
with spring
2½" – 16"
High-temperature steel
¹) DN 400 only for PN 40 and 63
Type PN DN (mm) Version
528 620 10 – 40
40 – 250
without spring
1½" – 10"
528 630 10 – 40
65-250
with spring
2½" 10"
528520 10 – 25
300-1000
without spring
12" – 40"
528 530 10 – 25
300-1000
with spring
12" – 40"
Stainless steel
Type PN DN (mm) Version
526 620 10 – 40
40 – 250
without spring
1½" – 10"
526 630 10 – 40
65 – 250
with spring
2½" 10"
526 520 10 – 25
300 – 1000
without spring
12" – 40"
526 530 10 – 25
300 – 1000
with spring
12" – 40"
Steel