The small metal Rotameter RAKD differentiates itself from other comparable variable area meters by means of light and guided float design offering the smallest measurable flow ranges in the market. RAKD meters can be fitted with a fine control valve and are designed with horizontal process connections.
An integrated flow controller based on the differential pressure principle, which allows a constant flow rate to be maintained regardless of any variations in process pressure, is just one of the many different options available. The RAKD with either standard or fail safe limit switches is suitable for safety applications up to SIL level 2. The configuration with valve and controller reaches SIL level 1.
The RAKD Rotameter combines several benefits of the float principle: a robust design, reliable measurements, independence of the electrical power supply when operated as mechanical pointer instruments and an electrical output signal. They are moreover easy to install and require no maintenance. Both the RAMC and the RAKD are packaged in an attractive, all-stainless steel housing and boast a long service life under the harshest industrial conditions.
|For Pipe Sizes||DN 15 to DN 150 (1/2" – 6")|
|Process Connections||Flange, threaded or Triclamp|
|Measuring Range||Water 20°C: 0,1 l/h to 250 l/h
Air 20°C 1 bar abs.: 4 l/h to 8000 l/h
|Wetted Parts Material||1.4571 (AISI 316Ti) Hastelloy, Monel and Titanium on request|
|Process Temperature||-25°C to + 250°C|
|Process Pressure||100 bar, higher pressures on request|
|Ambient Temperature||-25°C to 100°C|
|Accuracy acc. VDE/VDI 3513-2 (qG =50%)||4 %|
|Ex-approvals||ATEX, NEPSI, FM, CSA|
|Signal Outputs||Analog 4-20mA, pulse output|
|Power Supply||24 V DC 2-wire|
|Degree of Protection||IP66/IP67|
|Suitable for Applications acc. IEC 61508
and Machinery Directive ISO 13849
|Additional Features||Limit switches for low/high alarms
Fine control valves
Easy installation with Quickon connector
With the increased interest in green energy and renewable fuel sources, Biodiesel has emerged as a viable alternative to standard petroleum based diesel and home heating oil. It has zero CO2 emissions and can be created from waste vegetable oil or rendered animal fat. The number of Biodiesel processing plants has grown to over 2500 in the US alone.
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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The Variable Area Flowmeter is one of the oldest and mature principles in flow measurement with its simple design: a float rises inside a conically shaped glass tube as the flow increases and its position on a scale can be read off as the flow rate.In the 1990s, Yokogawa strengthened its focus on flowmeters through cooperation with and the eventual acquisition of the German flowmeter manufacturer ROTA. In so doing Yokogawa gained access to 100 years of flowmeter expertise and completed its flowmeter portfolio by adding the Rotameter (variable area) and Rotamass (Coriolis) product lines.
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