Dimensions and mass
Working pressures and temperatures
 Face-to-face length
The NAF-Check valve is manufactured in DIN, VIS and BS standard versions with face-to-face lengths in accordance with SS-ISO 5752, as detailed in the table and drawing above. The face-to-face lengths in the ANSI and API versions correspond to ANSI dimensions as given on the ANSI 150-300 page.
Connection
As standard, the NAF-Check valve is intended for clamping between PN 10, 16, 25, 40, 64 and 100 pipe flanges in accordance with DIN, VIS, BS, ANSI and API standards.
| Test pressures |
Pressure |
Test pressure*, bar |
class, |
Positive pressure - water |
PN |
Open valve |
Closed valve |
100 |
150 |
110 |
40 |
60 |
44 |
25 |
38 |
28 |
16 |
24 |
18 |
| * Leakage does not exceed 1 cm3/minute, irrespective of size, at the specified test pressures. Test medium is water. |
Material specifications - see illustration above
Valve code table
Introduction
Installation & Maintenance
ANSI 150-300
Limitations
Certification
Sizing & Pressure Drop
|
Site Navigation
Products
Norval
Products
