Gemue 806
The Gemue 806 is the odd one out in the 800 series: a variable area flowmeter with a guided float in 1.4571 (316Ti) stainless steel, and it exists only in DN 65. The guide keeps the float on the pipe axis instead of letting it float freely — which steadies the reading exactly where the large cross sections of the top nominal size would otherwise make it restless. The group is correspondingly narrow: 60 versions, against thousands in the free-floating groups. Almost all of them are scaled in cubic metres per hour.
Float and measuring principle
The guided float is the whole difference. In the other groups it floats freely in the conical tube; here it runs in a guide and therefore stays steady even at the large cross sections of DN 65. Consistently, the metering tube comes in only two cone sizes — cone 75 and cone 77 — rather than the nineteen of the free-floating groups. No nominal size other than DN 65 exists in this group; for DN 20 to DN 50 in stainless steel, use the Gemue 807.
Scale, unit and medium
The range of media is as narrow as the group — the scales are calibrated for one medium: water (54 versions). That matches the application: DN 65 with a guided float is a size for large volume flows, not for the chemistry of special scales. The unit is equally clear-cut: 50 of the 60 versions are printed in cubic metres per hour, not a single one in litres per hour. Sealing is by O-rings in EPDM (50) and FPM (10).
Metering tube, seal and connection
Despite the small number of articles, all three metering tube materials are represented: clear PA (32), PSU (20) and clear PVC-U (8). Connection is made via 9 connection types and 7 material combinations — at DN 65 these include plastic lapped flanges to EN 1092 PN 10, which play no part in the smaller nominal sizes. The body is a straight through tube. If you need a version not listed here, ask us: GEMÜ builds this series largely to order.
Where it sits in the 800 series
The 806 is the only group in the 800 series with a guided float and the only one that exists in a single nominal size. All other groups cover DN 20 to DN 65 and let the float float freely: Gemue 801 and Gemue 811 in PVC, Gemue 805 and Gemue 815 in PP, Gemue 807 and Gemue 817 in 1.4571 stainless steel — in each pair the second one with a magnet for contactless evaluation. For the same material without a guide in DN 65, the Gemue 807 is the direct neighbour. Smaller nominal sizes from DN 10 are covered by the 850 series, for example the Gemue 855. Air is measured by the Gemue 875 for air, accessories are under Gemue accessories for flowmeters. All series: Gemue brand page.
