Krohne VA40/ VA45 Variable area flowmeter

Krohne  VA40 VA45 Variable-area flowmeters     1.   VA40 VA45 Variable-area flowmeters   The VA40 flowmeter is suitable for measuring the flow rate of liquids or gases. The VA45 flowmeter is suitable for measuring gases at low operating pressures   Highlights • Consistently used overall length concept • Low loss of pressure for gas applications • Low maintenance • Optional limit switches • Simple installation and start-up • Simple float guidance • Shatter protection Industries Can be used in all industrial sectors, for example: • Chemical • Food and beverages • Heating, cooling, and air conditioning • Iron, steel and metal • Mining and building materials • Oil and gas • Pharmaceutical • Power plants • Mechanical engineering • Pulp and paper • Water • Furnace construction Applications • Measuring gas • Burner controlling • Water circuits   2. Technical data   • The following data is provided for general applications. If you require data that is more relevant to your specific application, please contact us or your local sales office. • Additional information (certificates, special tools, software,...) and complete product documentation can be downloaded free of charge from the website (Download Center). 2.1Measuring system   2.2Operating conditions 2.2 Materials  2.3Limit switches   (only VA40)    2.4  Use of the limit switch   3.0 Dimensions and weights   Dimensions VA40   3.1 Dimensions VA45   3.2 Measuring ranges Measuring ranges VA40 The oper. press. should be at least twice the pressure loss for liquids, and at least 5   times the pressure loss for gases! The specified pressure drops are valid for water and air at   maximum flow rate. Other flow ranges on request.Conversion of other media or operating data   (pressure, temperature, density, viscosity) isperformed using the calculation method in   accordance with VDI /VDE Directive 3513. Measuring ranges VA45 The operating pressure should be at least 5 times the pressure loss for gases! The specified pressure drops are valid for water and air at maximum flow rate. Other flowranges on request. Conversion of other media or operating data (pressure, temperature, density, viscosity) is performed using the calculation method in accordance with VDI /VDE Directive 3513. 3.3 Installation condtitions When installing the device in the piping, the following pointsmust be observed:   • The variable area flowmeter must be installed vertically (measuring principle). Flow direction   from bottom to top. For installation recommendations please refer also to VDI/VDE 3513   Sheet 3.   • Before connecting, blow or flush out the pipes leading to the device.   • Pipes for gas flow need to be dried before the device is installed.   • Use connectors suitable for the particular device version.   • Align the pipes centrically with the connection bores on the measuring device so they are free   of stresses.   • If necessary, support the pipeline to reduce vibrations being transmitted to the measuring   device.   • Do not lay signal cables directly next to cables for the power supply.                    

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