The RAGL Laboratory Rotameter is ideal for measuring low flows of liquids and gases, designed with a conical glass metering tube that has a free rotating float, which is mounted in a vertical pipeline with flow direction upwards. In addition, its anti-static metering tubes allow for measurement of small quantities of gas, delivering high accuracy at low flow rates.
The flow is indicated by the top of the float and can be read from the standard scale on the metering tube or from a connected scale.
Meets High Safety Standards
The RAGL’s tube is sealed with o-rings and additional tube gaskets, which are fixed with pressure flanges for high tightness, providing a higher level of safety.
Additional Features & Options
|For Pipe Sizes||1/4" to 3/8"|
|Process Connections||Threaded, Swagelok, cutting ring, nozzle|
|Measuring Range||Water 20 °C: 2 ml/h - 600 l/h
Air 20 °C 1 bar abs.: 0,1 l/h - 6300 l/h
|Wetted Parts Material||Borosilicate glass, 1.4571 (AISI 316Ti) or Polypropylene
Various float materials available
|Gaskets||NBR, FKM, PTFE|
|Process Temperature||-25 °C to + 130 °C|
|Process Pressure||16 bar|
|Ambient Temperature||-25 °C to 80 °C|
|Accuracy acc. VDE/VDI 3513-2(qG =50%)||1,6 % / 2,5 % / 4 % /|
|Suitable for Applications acc. IEC 61508
and Machinery Directive ISO 13849
|Additional Features||Limit switches for low/high alarms
Fine control valves
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One of the most widely used methods of monitoring / controlling liquid level in a tank is the use of Bubble Tubes with Pressure or Differential Pressure Transmitters. A small but uninterrupted flow of air or inert gas is forced down through a dip tube which extends to near the bottom of the tank. The back pressure of the introduced gas is a function of the liquid level or head in the tank. The pressure transmitter takes the back pressure and converts it to an analog signal that is sent to the control room. The plant operator will then be able to monitor the exact level in the tank.
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