Steca VM1 flowmeter

The TA VM1 flow rate measurement component allows flow rate measurement of the water/water-glycol heat transfer fluid.

A contact sensor (e.g. reed relay) is used to send a pulse to the solar controller (e.g. Suntana / Suntana 2 / TR 0603 / TR 0704) every time a defined quantity of fluid passes through the system (e.g. 1 litre = 1 pulse). At the same time, the controller determines the temperature difference between the supply and return temperatures and then calculates the quantity of heat generated, by using this difference, the flow rate and the specific material characteristics of the heat transfer fluid. The heat volume calculated is then finally stored in the controller and displayed as kWh.

Features

• Nominal size: DN 15
• Nominal flow rate Qn: 1.5 m³/h
• Pulse rate: 1 l/Imp.
• Maximum operating temperature: 120 °C
• Operating pressure: up to 16 bar according to DIN 2401
• Installation and connection dimensions according to DIN ISO 4064
• For horizontal and vertical installation
• Hard-metal bearings up to 120 °C
• Contact loading: 24 V (without series resistor)
• Cable length: 3 m

Special features

• This series is equipped with special hard-metal, dryrunning bearings for the through-flow paddle counter,it uses magnetic coupling and has been conceived according to the latest technology.
  
• To avoid disturbances caused by unclean water, only the paddle wheel sits in the fluid path.
• The roller counter is evacuated and sealed against dust and water to avoid cracking the glass pane under extreme temperature fluctuations.
• The counter can be rotated for easier reading.