Specification Sheet

Non-return valves, type GNVP
3
Grundfos valves
1
1. Non-return valves, type GNVP
Fig. 1 GNVP valves
GNVP non-return valves are designed for installation
in pipe systems between two DIN flanges. Thanks to
their compact design, the GNVP valves are easy to
install. All composite parts have a wide range of
drinking water approvals, maintained at regular test
intervals. According to the DIN EN 13959 standard, all
GNVP non-return valves incorporate two test/drainage
plugs for user-friendly usage.
Applications
The GNVP non-return valves are designed exclusively
for installation in Grundfos booster systems where a
one-way water flow is required.
Drinking water approvals
WRAS
DVGW
ACS
BELGAQUA
For full details on approvals and certificates, please
reach out to your local Grundfos sales company.
Construction
The polyoxymethylene (POM) valve housing is
equipped with one or several insert valve cartridges,
depending on the size. GNVP DN 32, DN 40 and DN
50-I are equipped with one valve cartridge. GNVP DN
50, DN 65, DN 80 and DN 100 are equipped with
several valve cartridges. The DN 50-I is a special
version with a smaller seal diameter.
The valve cartridge components are made of POM, the
seals are made of NBR, and the spring is made of
stainless steel, for optimum functionality and reliability.
Head loss
Fig. 2 Head loss curves for non-return valves, type
GNVP
Dimensions
TM04 9408 4110
Maximum operating pressure: 16 bar (PN 16).
Liquid temperature: 0 °C to +60 °C.
TM04 9386 44170
Type
Outer
diameter
[mm]
Width
[mm]
Size of O-
ring seal
[mm]
Product
numbers
GNVP
DN 32 (1 1/4")
70 60 ∅45 x 3 91040183
GNVP
DN 40 (1 1/2")
90 60 ∅56 x 3 91040184
GNVP
DN 50-I (2")
108 60 ∅76 x 3 96155179
GNVP
DN 50 (2")
108 60 ∅83 x 3 98595908
GNVP
DN 65 (2 1/2")
125 60 ∅94 x 3 91040186
GNVP
DN 80 (3")
143 60 ∅110 x 3 91069032
GNVP
DN 100 (4")
160 60 ∅130 x 3 91040187
0 10 20 30 40 50 60 70 Q [m³/h]
0
1
2
3
4
5
6
[m]
H
GNVP
DN50-I
DN50
DN100
DN80
DN65
DN40
DN32