Deltaflow DF Pitot Tube

The deltaflow differential pressure flowmeter (dp) is a cost- and energy efficient flowmeter for gases, liquids and steam. Due to the special probe profile the deltaflow pitot tube can assure the highest level of precision and excellent process liability, even under extreme conditions. Averaging pitot tubes are causing the lowest pressure loss of all dp-flow meters and are therefore highly energy efficient. The deltaflow differential pressure flow meter has been installed several ten thousand times in all industrial fields. Compared with traditional ISO 5167 primary elements such as orifices or venturis, gas flow meter deltaflow is not only saving energy but is also more inexpensive and causes less mounting costs. deltaflow’s high tolerance on non-ideal flow profiles ensures high accuracies even under short inlet conditions.

Typical applications are flow measurement of steam, the metering of pressurized air, liquid flow measurements of water, oil, benzene. deltaflow is used to measure stack gas and flare gas, natural gas, bio gas and many more…

The deltaflow averaging pitot tubes are used in thousands of industrial plants such as power plants, sewage plants, breweries, automotive plants, steel plants… For the calculation and design of the deltaflow flowmeter a self-explanatory software is free for your download.

Specifications

Advantages

• Low pressure drop, therefore high energy saving potential
• Easier to install, no need to disconnect pipework
• Low weight even for large diameters
• Very high accuracy (deltaflow from 0.4%)
• Very high measurement dynamics, up to 1:30 depending on application
• Highly resistant to dirt and condensate
• Low initial cost, even for large diameters
• Proven principle

Flow measurement with the deltaflow pitot tube is based on the same principles as classic primary elements (orifice, venturi, nozzle), so integration into a measurement computer or DCS is straightforward.

LSP Air Purge Unit

Perfect for contaminated, dusty gases:  The optimised measuring profile with 8 mm differential pressure holes locally increases the flow velocity to 2.5 times the pipe velocity, blowing dust away from the probe. The deltaflow reliably and accurately measures most dry dusts up to a particle load of around 100 mg/m3.

For higher loads or sticky dusts, use the LSP air purge unit: The LSP is connected between the deltaflow and the differential pressure transmitter and automatically purges the probe with compressed air at a selectable interval. This keeps the probe free of dust and provides accurate measurement results.