neoperl - flow, stop and go
NV/OV/OF/OD Line
product database
Check valves NV Line

NV Line
non-captive seal
with snap-fit tabs

Check valves OV Line

OV Line
captive seal 
with snap-fit tabs

Check valves OF Line

OF Line
captive seal
without snap-fit tabs

Check valves OD Line

OD Line
 captive seal 
with snap-fit tabs

NV/OV/OF/OD Line

Check valves of the NV/OV line are open cartridges and provide a superior flow performance (reduced head loss). They can only be assembled against the direction of flow but require no retainer («snap-fit» design with flexible tabs).

The distinguishing feature between NV and OV lines is the positioning of the outer seal (NV: non-captive seal, OV: captive seal). OV cartridges cover a size range from 10 mm to 40 mm, NV cartridges cover a size range from 15 to 50 mm.

OF cartridges feature an O-ring in groove but no snap-fit tabs. They can be assembled both in the direction of flow and against it; Therefore, the OF combines easy assembly and superior flow performance. OF check valves are now available in sizes 7 to 20 mm.

With the OD type we have combined the advantages of the aforementioned lines, thus offering the highest flexibility. OD check valves can be assembled in both flow directions and are equipped with snap-fit tabs. Available in sizes 8 to 13 mm.