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RAKD Rotameter Flow Meter
Brand: Yokogawa Electric CorporationA Float is Guided Concentrically in a conic Metal tube. The position of this float is magnetically transmitted to the indicator.
The short-tube Rotameter is used for measurement of low flow rates of liquids and gases.
Its special application is in troubled, opaque or aggressive mediums and under high pressure.
The instrument is mounted in a vertical pipeline with flow direction upwards. When the process conditions are changed the scale needs to be replaced by a new one of which the values should be calculated.
Features- Different process connections like internal threads and flanges
- With fine control valve (horizontal connection) and without valve (vertical connection)
- All wetted parts of stainless steel AISI 316Ti (1.4571)
- Measuring accuracy acc. Directive VDI/VDE 3513 sheet 2 (qG=50%)
- Round industrial standardized stainless steel housing with degree of protection IP 66/67
- Light, guided floats resulting in low pressure loss and stable float movement
- Maximum flow range 1-250 l/h water resp. 40-8000 l/h air, portioned in 13 flow ranges with a relation of 1:10
- Pressure controller (normal up to 25 bar at 20°C) for a maximum flow of 100 l/h water resp. 3.250 l/h air (only in combination with valve)
- Electronic µP-controlled transmitter with linearized output
- Electrical connection by fast connection technique (Quickon)
- Limit switches, also available as “Fail Safe” version
- Connection of common transformer isolated barriers and transmitter power supplies possible
- Intrinsically safe version (Ex-i): ATEX, IECEx, FM, CSA, NEPSI, PESO
- Suitable for SIL application, FMEDA report available
Specifications
Ambient Temperature Range
- 0° to 100° C (32° to 212° F)
Approvals & Certifications
- CE
- CSA Explosion-proof - Class I, II, III, Div. 1, Groups A, B, C, D, E, F, G
- EMC: EN 61326-1: 2006, Class A, Table 2 EN 61326-2-3: 2006
- FM
- GOST
- IEC Ex ia IIC T6 to T4 Gb
- ISO 13849-2
- KEMA 00-ATEX-1037X
- KOSHA: 2009-BO-0157
- NEPSI
- PESO
- RTN
Approvals & Certifications
- Compliance with the Order According EN 10204: 2004-2.1 & Test Report According EN 10204: 2004 -2.2
- FMEDA
- Material Certificate
- Pattern Approval Certificate for Measuring Instruments
- Pressure Test Report Measuring System
- SIL Certification
BSP Connection
- G 1/4” Female
- G 3/8” Female
Capacity
- 2 A, Max.
- 250 Vac, Max.
Diaphragm Material
- PTFE
Distance
- 0.31” (8 mm) Min. Distance between 2 Contacts (Hysteresis of Limit Switches)
Electrical Connectors
- M12-Connector According IEC 61076-2-101
- Quickon-Plug
Enclosure, Body Material
- AISI 304 Stainless Steel 1.4301
- Stainless Steel
Environmental Protection
- Dust-Proof
- Explosion-proof
- Flameproof
- IP66
- IP67
Flange Size - 1” (DN 25)
- 1” (DN 25) - 150# ASME B16.5
- 1” (DN 25) - 300# ASME B16.5
- PN 40
Flange Size - 1/2” (DN 15)
- 1/2” (DN 15) - 150# ASME B16.5
- 1/2” (DN 15) - 300# ASME B16.5
- PN 40
Flow Rate
- 1 to 250 L/hr - Water
- 40 to 8,000 L/hr - Air
Frequency
- 4 Hz, Max.
Gasket Material
- PTFE
Hysteresis
- < 0.5 mm - Limit Switches
- ≤ ± 0.15 % of Full Scale: Analog Output, AC-Part of Analog Output (Electronic Transmitter)
Length
- 125 mm (with Flange 250 mm) - Face to Face
Linearity
- ≤ ± 0.25 % of Full Scale: Analog Output (Electronic Transmitter)
Load
- 700 ohms: Power Supply for Electronic Transmitter
Maximum System Pressure
- psi: 362.6 (kPa: 2,500, bar: 25)
Measurement Accuracy
- 4 % According to Directive VDI/VDE 3513 Sheet 2
Media
- Fluids to be Measured: Liquids & Gases
NPT Connection
- 1/4” NPT Female
- 3/8” NPT Female
Output
- ≤ 1 mA or ≥ 3 mA - Limit Switches
- 200 ms: Pulse Length
- 21.5 mA - Max.
- 4-20 mA - Analog Output & Power Supply for Electronic Transmitter
- Electronic Switch with Galvanic Isolation (Pulse Output)
- Pulse Output - Qmax ≤ 1 → 0.0001, 1 < Qmax ≤ 10 → 0.001 etc, 4 Hz (Frequency), 200 milliseconds (Pulse Length)
Power Supply
- 115 Vac ± 10 %, 45-65 Hz for Limit Switches
- 14-30 Vdc
- 230 Vac ± 10 %, 45-65 Hz for Limit Switches
- 24 Vdc ± 25 % for Limit Switches
Power Supply Effect
- ≤ ± 0.1 % of Full Scale
Process Temperature
- -25° to 250° C (-13° to 482° F)
Ratio
- Measuring Range - 10:1
Relay Output
- 1 or 2 Potential-Free Change over Contact
Repeatability
- ≤ ± 0.16 % of Full Scale: Analog Output (Electronic Transmitter)
Resistance
- 500 ohms, Max.
Response Time
- Approximately 1 second
Scale Panel Material
- Removable Aluminum Plate with Scale (Double Scale as Option) - Indication Scale
Seat / Seal Material
- PCTFE
- Silver
Size
- Cable Diameter: 4 to 6 mm (Electrical Connection)
Spring Material
- Stainless Steel - Controller
Stability
- ≤ ± 0.2 %/Year: Long Time (Analog Output)
Storage Temperature
- -40° to 110° C (-40° to 230° F)
Supply Voltage
- 20-250 Vdc/ac, 50/60 Hz: Power Supply for Electronic Transmitter
- 8 Vdc: Nominal Voltage for Limit Switches
Switch Type
- Inductive Proximity Limit Switch SC2-NO
Temperature Coefficient
- ≤ ± 0.5 % / 10 K Full Scale Analog Output - Electronic Transmitter
Temperature Range
- -25° to +65° C (-13° to 149° F) - Electronic Transmitter
- -25° to 80° C (-13° to 176° F) - Controller
Wetted Materials
- 316Ti Stainless Steel, 1.4542
