General Specifications Model RAKC Short-tube Rotameter A conical float is guided into a cylindrical metal tube provided with an orifice plate. 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. FEATURES Standard design with internal thread Other process connections on request Without valve (vertical connection) With valve (horizontal connection) Controller with valve can be fitted Pressure resistant (40, 100, 160 bar). Other ratings on request. Optional output signal of 4-20 ma by electronic transmitter Intrinsically safe version Optional limit switch (Min., Max.) MEASUREMENT PRINCIPLE Float-flowmeter with sturdy magnetic indication attachment Figure 1. Measurement principle YOKOGAWA 4rd Edition
2 STANDARD SPECIFICATIONS Fluid to be measured : Liquid or gas Measurable flow rates : Refer to Flow table Measuring range : 10:1 Accuracy : According to VDI/VDE 3513 Class 4; for smallest range (Cone 31), 5% of endscale value Indicator scale : Flow units or percent Process temperature - Standard : -180 ºC to +150 ºC - With limit switch : -40 ºC to +150 ºC - For electronic transmitter: -40 ºC to +150 ºC For temperatures < 0 ºC or >100 ºC, please specify the /A1 option ('Isolation distance') Process connection - Inner thread : G 1/4"; 1/4 NPT; G 3/8"; 3/8 NPT - Cutting ring : 6 mm; 8 mm; 10 mm; 12 mm - Nozzle : 6 mm; 8 mm Materials : Medium wetted parts of 1.4571. Other materials on request Housing - material : Cast aluminium painted - Installation position : Vertical - Flow direction : Upwards - Installation length : Typically 125 mm - Protection : IP 64 - Color : Yellow Weight : Refer to Weight on page 7 LOCAL INDICATOR (SUFFIX CODE: T70) Ambient temperature : -50 ºC to +100 ºC Option : Limit switch ELECTRONIC TRANSMITTER (SUFFIX CODE: E70 NOT EX; SUFFIXCODE: X70 EX-VERSION) Power supply : 14-30 V DC Consumption : 20 ma - Load resistance Ri : 0-850 Ohm - Max. voltage : Umax = 30 V - Max. short circuit current : Imax = 30 ma Output signal : 4-20 ma The output signal is not linear with the flow, and should be linearized externally for optimization. Electrical classification : [EEx ib] IIC T6 - Certificate of conformity : DEMKO 90C.98014X - Internal capacity Ci : 30 nf - Internal inductivity Li : < 250 mh - Temperature range : T6:-20/+40 ºC, T4:-20/+50 ºC Electrical connection : PG7 - Cable diameter : 3-6 mm - Max. conductor : 1,5 mm 2 Connection diagram : See figures 1 and 2 POWER SUPPLY FOR ELECTRONIC TRANSMITTER Option code: /U2I : 220 V AC (Ex-version) Option code: /U4F : 24 V (Ex-version) Other voltages and current versions on request G + 2 F RAKC-E70 1 Output 4-20 ma + A l = 0-800 Ohm + Supply voltage 14-30 V DC Figure 1. Transmitter -E70424 without power supply (not intrinsically safe) G + 2 PA PA 2 Output 4-20 ma P l = 0-375 Ohm IN+ 18 17 Terminal 17 is at PApotential F RAKC-X70 1 1 IN- + NG 24 EX2- (EEx ib) IIC ~ ~ N 10 11 L1 Supply voltage 220 V AC TYP NG24EX2-220AC 110 V AC TYP NG24EX2-110AC 24 V DC TYP NG24EX2-024DC Ex - area non EX - area Figure 2. Transmitter -X70424 with power supply (intrinsically safe)
3 TECHNICAL SPECIFICATION OF THE OPTIONS LIMIT SWITCHES (OPTION CODE: /K1.../K3) Type : Inductive switch SJ 3,5-N acc. DIN 19234 (NAMUR) Ambient temperature : -25 ºC to +100 ºC Nominal voltage : 8 V DC (Ri 1 kω) Supply voltage range : 16 V Output signal : 1 ma=0; 3 ma=1 LIMIT SWITCHES IN FAIL SAFE VERSION (OPTION CODE: /KS) Type : Inductive switch SJ 3,5-SN acc. DIN 19234 (NAMUR) in FAIL SAFE version Ambient temperature : -40 ºC to +100 ºC Other specifications : See type SJ 3,5-N Available with options /K1.../K3 only POWER SUPPLY FOR LIMIT SWITCHES (OPTION CODE: /WXX) Type : Transistor relay acc. DIN 19234 (NAMUR) Power supply : 230 V AC + 10%/-15%, 50/60 Hz (/W2A,/W2B) 24 V DC ± 20% (/W4A,/W4B) Relay output : 1 potential-free changeover contact (/W2A, /W4A) 2 potential-free changeover contacts (/W2B, /W4B) Switching capacity : Max. 250 V AC; max. 2 A Control circuit Entity parameters : Intrinsically safe [EEx ia] IIC : acc. certificate of conformity PTB Nr. Ex-94.C2086 CONTROLLER (OPTION CODE: /R1.../R4) Differential pressure controller for a constant flow at fluctuations of the process pressure. - Controller /R1 and /R2 for liquids with variable inlet or outlet pressure and for gases with variable inlet pressure and constant back pressure. - Controller /R3 and /R4 for gases with fluctuations of the back pressure. Max. liquid flow : 100 l/h Max. gas flow : 3000 l/h Max. pressure : 40 bar Recommended differential pressure : > 400 mbar Materials Housing Diaphragm Springs Control characteristics CrNi-steel PTFE CrNi-steel Brass Buna CrNi-steel : See diagram The curves V1 to V6 indicate how the flow depends on the inlet pressure for different valve settings. The back pressure at the outlet (ambient pressure) is 1 bar. l/h air at 20 ºC, 1.013 bar abs. Inlet pressure Figure 3. RAKC with limit switches and power supply Figure 4. Diagram control characteristics
4 MODEL SPECIFICATIONS Model Suffix code Description RAKC53 Connecting diameter 6 mm for process connection only RAKC54 Connecting diameter 8 mm C4; C6; C7; P1 RAKC55 Connecting diameter 10 mm for process connection only RAKC56 Connecting diameterr 12 mm C4; C6; C7 RAKC41 Connecting diameter 1/4 inch for process connection only RAKC42 Connecting diameter 3/8 inch R4; G4; G6; T4; T6; T7 Process -R4 Internal thread Rp PN40 connection -G4 Internal thread G PN40 for models -T4 Internal thread NPT PN40 RAKC41 -G6 Internal thread G PN100 RAKC42 only -T6 Internal thread NPT PN100 -T7 Internal thread NPT PN160 -C4 Cutting ring PN40 for models -C6 Cutting ring PN100 RAKC53, RAKC54, -C7 Cutting ring PN160 RAKC55 and RAKC56 -P1 Nozzle PN10 RAKC53 and RAKC54 only Material wetted SS 1.4571,(AISI 316 Ti) parts Cone - See Flow table Valve NNN Without valve (not with optional controller) Gasket Valve socket SAE With insertion valve in input 1) Buna Silver SBE With insertion valve in input 1) Viton Silver SAA With insertion valve in output 1) Buna Silver SBA With insertion valve in output 1) Viton Silver Indicator/transmitter -T Local indicator -E Electronic transmitter (not Ex) -X Electronic transmitter (Ex) Housing type 70 Aluminium Power supply, output NNN Use for local indicator/t 424 24 V DC (2-wire, 4-20 ma) Style code *A Style Options / See Options 1) Valve can only be used until PN16. The contents of the selection table should be noted for determining the model code. Recommended Please specify in the following order - controller/without controller - valve/without valve - connecting diameter RAKC and process connection - flow range - model, suffix and option code. Ordering instructions: Standard 1. Model, suffix and option code 2. Flow conditions a. Temperature b. Pressure c. Viscosity d. Density For gases : cross-reference of the scale Option /BG : customer specification notes
5 OPTIONS Options Option code Description Isolation distance /A1 Indicator with isolation distance for t > 100 ºC or t < 0 ºC Mark /B1 Stainless steel tag plate /BG Tag number. Please specify. Tests/Certificates /H1 Certificate of degrease /P2 Certificate of compliance with the order (acc. to DIN 50049, 2.1) /P3 Test report (acc. to DIN 50049, 2.2) /P6 Inspection certificate (acc. to DIN 50049, 3.1b: pressurised parts) /PP Inspection certificate for pressurised air Limit switch /K1 MIN contact /K2 MAX contact /K3 MIN-MAX contact, MIN-MIN-contact, MAX-MAX-contact For T-indicator only /KS FAIL-SAFE version, MIN-contact /K7 FAIL-SAFE version, MAX-contact /K8 FAIL-SAFE version, MIN-MAX-contact /K9 FAIL-SAFE version, MIN-MIN-contact /K10 FAIL-SAFE version, MAX-MAX-contact Limit switch in FAIL-SAFE version (-40 C to + 100 C), only in combination with options /K1... /K3 Controller /R1 Inlet controller (of 1.4571) with valve in the input For gases with variable /R2 Inlet controller of brass with valve in the input inlet pressure and liquids with variable inlet and back pressure /R3 Back pressure controller (of 1.4571) with valve in the output For gases with variable /R4 Back pressure controller of brass with valve in the output back pressure Additional /U2I Power supply 220 V AC; 4-20 ma; 24 V Ex Instruments /U4F Power supply 24 V DC; 4-20 ma; 24 V Ex /W2A Transistor relay KFA6-SR2-Ex1.W/230 V AC; 1 channel, changeover contact /W2B Transistor relay KFA6-SR2-Ex2.W/230 V AC; 2 channels, changeover contacts /W4A Transistor relay KFD2-SR2-Ex1.W/24 V DC; 1 channel, changeover contact /W4B Transistor relay KFD2-SR2-Ex2.W/24 V DC; 2 channels, changeover contacts Options can be added to the model code.
6 FLOW TABLE Recommended combinations Water/Liquids Air/Gases* 20 C 20 C,1 bar absolut Optional Design R Process connection Max. Cone Pressure Max. Cone Pressure controller (valve) A Flow drop Flow drop K C [l/h] code [mbar] [I/h] code [mbar] 1 31 28 45 31 39 2,5 33 29 100 33 41 53 -C4/-C6/-C7/-P1 4 34 29 160 34 41 54 -C4/-C6/-C7/-P1 6 37 27 230 37 38 without NNN 55 -C4/-C6/-C7 10 41 27 370 41 38 56 -C4/-C6/-C7 16 42 28 570 42 39 41 -G4/-G6/-T4/-T6/-T7 25 43 28 850 43 39 40 44 27 1500 44 38 60 47 28 2100 47 39 100 51 29 3300 51 41 53 -C4/-C6/-C7/-P1 54 -C4/-C6/-C7/-P1 without NNN 55 -C4/-C6/-C7 160 52 29 5200 52 41 56 -C4/-C6/-C7 250 53 34 8000 53 48 42 -G4/-G6/-T4/-T6/-T7 1 31 28 45 31 39 SAE 2,5 33 29 100 33 41 4 34 29 160 34 41 SBE 53 -C4/-P1 6 37 27 230 37 38 without 54 -C4/-P1 10 41 27 370 41 38 SAA 55 -C4 16 42 28 570 42 39 56 -C4 25 43 28 850 43 39 SBA 41 -R4/-T4 40 44 27 1500 44 38 60 47 28 2100 47 39 100 51 29 3300 51 41 160 52 29 5500 52 41 250 53 34 8000 53 48 1 31 28 45 31 39 R1, R2 SAE 2,5 33 29 100 33 41 4 34 29 160 34 41 SBE 53 -C4/-P1 6 37 27 230 37 38 54 -C4/-P1 10 41 27 370 41 38 41 -R4 16 42 28 570 42 39 R3, R2 SAA 25 43 28 850 43 39 40 44 27 1500 44 38 SBA 60 47 28 2100 47 39 100 51 29 3300 51 41 Higher measuring ranges with process connection 1/2" (old design KCl 400-1000) on request. Valve model is advised
7 DIMENSIONS 158 Cutting ring Figure 5. Version NNN (without valve) Cutting ring Figure 6. Version SAE and SBE (with valve in input) Figure 7. Version SAA and SBA (with valve in output) Cutting ring Cutting ring 168 Figure 8. Versions SAE and SBE with option /R1 or /R2 (with valve in input and with inlet controller) Figure 9. Versions SAA and SBA with option /R3 or /R4 (with valve in output and back pressure controller) WEIGHT Weight Measuring range Dimension a Without valve With valve With control max. 100 l/h water G1/4 or 1/4 NPT ca. ca. ca. 1800 g 160 + 250 l/h water G3/8 or 3/8 NPT 600 g 1000 g -
YOKOGAWA EUROPEAN HEADQUARTERS Yokogawa Europe B.V. Vanadiumweg 11, 3812 PX AMERSFOORT The Netherlands Tel. +31-33-4641 611 Fax +31-33-4641 610 E-mail: info@yokogawa.nl THE NETHERLANDS Yokogawa Nederland B.V. Computerweg 1, 3606 AV MAARSSEN Tel. +31-346-59 12 11 Fax +31-346-56 61 96 AUSTRIA Yokogawa Austria Ges.m.b.H. Franzensbrückenstrasse 26 A-1021 WIEN Tel. +43-1-216 50 43 Fax +43-1-216 50 43 33 BELGIUM Yokogawa Belgium N.V./S.A. Minervastraat 16 1930 ZAVENTEM Tel. +32-2-719 55 11 Fax +32-2-725 34 99 FRANCE Yokogawa Contrôle Bailey S.A. Vélizy Valley 18-20 Rue Grange Dame Rose 78140 VELIZY VILLACOUBLAY Tel. +33-1-39 26 10 00 Fax +33-1-39 26 10 30 GERMANY Yokogawa Deutschland GmbH Berliner Strasse 101-103 D-40880 RATINGEN Tel. +49-2102-4983 0 Fax +49-2102-4983 22 ITALY Yokogawa Italia S.r.l. Vicolo D. Pantaleoni, 4 20161 MILANO Tel. +39-2-66 24 11 Fax +39-2-645 57 02 SPAIN Yokogawa España S.A. C/Francisco Remiro, N 2, Edif. H 28028 MADRID Tel. +34-1-724 20 80 Fax +34-1-355 31 40 UNITED KINGDOM Yokogawa United Kingdom Ltd. Stuart Road, Manor Park, RUNCORN Cheshire WA7 1TR Tel. +44-1-928 597100 Fax +44-1-928 597101 AUSTRALIA Yokogawa Australia Pty Ltd. Private mail bag 24 Centre Court D3 25-27 Paul Street North NORTH RYDE, N.S.W. 2113 Tel. +61-2-805 0699 Fax +61-2-888 1844 SINGAPORE Yokogawa Engineering Asia Pte. Ltd. 11, Tampines Street 92 SINGAPORE, 528872 Tel. +65-783 9537 Fax +65-786 2606 Manufactured by: GERMANY Rota Yokogawa GmbH & Co. KG Rheinstrasse 8 D-79664 WEHR Tel. +49-7761-567 0 Fax +49-7761-567 126 SOUTH AFRICA Yokogawa South Africa (Pty) ltd. 67 Port Road, Robertsham Southdale 2135, JOHANNESBURG Tel. +27-11-680-5420 Fax +27-11-680-2922 UNITED STATES OF AMERICA Yokogawa Industrial Automation 4 Dart Road NEWNAN, GA 30265-1040 Tel. +1-770-254 0400 Fax +1-770-251 6427 ISO 9001 CERTIFICATED FIRM CENTRAL/EAST REGION Via Yokogawa Austria: Czechia, Slovakia, Hungary, Poland, Croatia, Slovenia, Jugoslavia, Bulgaria, Romania, Macedonia, Bosnia & Herzegovina Distributors in: Denmark, Finland, Greece, Norway, Portugal, Russian Federation, Sweden, Switzerland and Turkey. Block 03,01-98 Subject to change without notice Copyright Printed in The Netherlands, 04-802 (A) Q