Description
The QBKB is a differential pressure flow meter without moving parts for pipes DN 15 … DN 250. It is particularly suited to liquids and to organic and inorganic solutions, steam on request, where a maintenance-free device with analogue signal is required.
Differential pressure across a fixed restriction, no field calibration. Flow 0.4 … 12 500 L/min depending on the pipe size, repeatability < 2 % of the actual flow rate. Accuracy is not documented. Output signal 4 … 20 mA, 1 … 5 V or 0 … 10 V. Supply 18 … 30 V DC, connection M12 × 1, 4-pin. No display in the standard type; communication output and LED or colour display on request.
Wetted parts stainless steel SUS 304, 316L on request. Threaded flange or flange depending on the nominal size. Pressure range 0 … 1.0 MPa, pressure rating 1.0 MPa, 1.6 or 2.5 MPa on request. Medium temperature -20 … +80 °C in the standard type, high-temperature types up to -40 … +350 °C, ambient -10 … +65 °C. Protection grade and weight are not documented. A declaration of conformity is not documented in the data sheet. Before sizing, note: Accuracy, protection grade, response time and weight have to be requested. The pressure rating is given as 1.0 MPa, while the standard flange is offered as PN16 with 1.6 MPa.
Advantages at a glance
- No moving parts, maintenance-free
- No field calibration
- Nominal sizes DN 15 … DN 250
- Ranges per nominal size in a range table
- Analogue output 4 … 20 mA, 1 … 5 V or 0 … 10 V
- High-temperature types up to +350 °C
- Wetted parts stainless steel, 316L on request