Technical data sheet
Type 291NF
01 System
EA anti-pollution non-return valve
Applications and special features
· Operates in any position · Minimum head loss · Silent and robust · Does not generate hammering · Closing system : double axial guiding · Excellent sealing at high as well as at low
with return spring
pressure ensured by a specially designed lip ring-seal. · Drilled bosses 1/4» with plug
Technical description
DN
mm 15/21 20/27 26/34 33/42 40/49 50/60 66/76
"
1/2 3/4 1 1 1/4 1 1/2 2 2'' (*)
PFA (bar) L1 10 10 10 10 10 10 10
PS (bar) L2 G1 G2 10 10 10 X X X x 10 10 10 10 10 10 10
Cat. References 3.3 3.3 3.3 3.3 3.3 3.3 3.3 149B 2220 149B 2212 149B 2222 149B 2213 149B 2214 149B 2215 149B 2216
Vvs-nr
10 10 10 10 10 10 10 10 10 10 10 10 10 10
· Connection : female/female, BSP thread · Permissible operating pressure PFA - water- (for supply, distribution and disposal of water) : See table · Maximum permissible pressure PS - other mediums : See table · Mini. -10 °C Maxi. 80 °C · Mediums : Clear liquids, gas · Approvals : ACS
BELGAQUA
* Connection 2''1/2
Important notice : The indicated pressure for the different categories of fluids (L1/L2/G1/G2) is under no condition a guarantee of use. Therefore, it is essential to validate the use of products under given operating conditions.
· International construction Standards : NF Antipollution according to NF EN 13959 - EN 1717 Thread connection according to NF E 03-005 ISO 228
Overall dimensions
Connections A
" 1/2 3/4 1 1 1/4 1 1/2 2 2''1/2 mm 15/21 20/27 26/34 33/42 40/49 50/60 66/76
B
mm 65 75 90 110 120 150 150
C
mm
