Low Maintenance Integrated Pressure and Industrial temperature sensors In most applications, the deltaflow can func- tion for years without requiring any mainte- nance at all. In media with high particulate content or in polluted media, we recommend using the LSP1 cleaning attachment from sys- tec Controls for periodic cleaning cycles. The deltaflow can easily be equipped with integrated pressure and temperature sen- sors in order to compensate for pressure or temperature if necessary, eliminating the need for separate attachments. High Pressures and Temperatures The deltaflow DF25-HD3 can be used for live steam at pressures far exceeding 600 bar and temperatures far hotter than 600°C. Tests were performed in accordance with pressure equip- ment guidelines 97/23/EC (formerly TRD). And because special demands are made on materials used in high-pressure applications, we have developed the DF25-HD3 with a unique flow profile specifically intended for use with live steam. This profile has the most minimal toler- ances and is manufactured from solid blocks, which means that it is not subject to any influ- ence from heat used in weld- ing processes. Advantage: Maximum measurement pre- cision, maximum durability, maximum security. The deltaflow DF25 and DF50 were successfully subjected to a three-month durability test con- ducted by the TÜV Compliance Board in accor- dance with clean air requirements identified in § 13 and 17 of the Federal Emission Control Ordi- nance and were included in the Environmental Control Agency’s clean-air guidelines for water- steam saturated flue and exhaust gasses. By the way: the deltaflow was neither heated nor cleaned throughout the entire test. Tested by the TÜV (German TechnicalInspection Authority) for Compliance with the § 13 and 17 of the Federal Emission Control Ordinance Production Tolerance of <0.025 mmThrough New Manufacturing Processes The deltaflow uses heat- milled precision profiles. The measurement toler- ance at the edge to edge width does not exceed +/- 0.025 mm. Absence of Capillaries Prevents Measure-ment Errors Caused by Water Columns All differential pressure pipes measure a minimum of 8 mm, so that any occurring condensation can flow freely back into the conduit. This means that there is no capillary effect to cause errors.

lt

No Measuring Errors Caused by Wel-ded Seams at Probe’s Cross Section Most dynamic pressure probes are con- structed of two outer walls and a separat- ing wall welded between the two cham- bers. These are generally manufactured by welding them in sideways and then manu- ally adjusting them, resulting in production tolerances at the edge to edge width of between 1 and 2 mm. But a production tol- erance of as little as 1 mm can result in a measuring error of up to 10% in a conduit measuring 100 mm, and the error can be even greater in conduits of smaller diame- ter! To solve this problem, systec deve- loped a production process in which the deltaflow’s welds are located along the probe’s curves instead of at the critical cross section.

a fl ow

Conventional probe profile: Welded seamsand surface adjustment at the critical frontsurfaces, resulting in asymmetries and toler-ances at the edge to edge width. Flow profile of the DF25: Weldedseams are located on the noncriticalcurves; there is no impact on the meas-urements at the edge to edge width.The precision profile of the DF25-HD3 ismanufactured from solid steel—no assem-bly processes, no heat-impacted surfaces.

5