DON

DON
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DON

Product catalog summary
Overview: The document outlines the technical specifications and operational guidelines for the Positive Displacement Oval Gear Flow Meter Model DON, designed for measuring viscous liquids. It covers measuring ranges, materials, accuracy, and output options.
Specifications:
  • Measuring Range: 0.5 to 36 l/h and 150 to 2500 l/min.
  • Viscosity Range: Up to 1000 cP, with higher capabilities using special rotors.
  • Accuracy: ±0.2% to ±1% of reading.
  • Materials: Aluminium or stainless steel body, with various internal component materials.
  • Pressure and Temperature: Maximum pressure of 100 bar and temperature up to 150°C.
Principle of Operation: Utilizes positive displacement technology with oval gear rotors. Embedded magnets detect gear rotation, providing high-resolution pulse output, ensuring precise measurement regardless of liquid conductivity.
Applications: Suitable for petroleum, chemicals, grease, fuels, inks, and pastes. Stainless steel models are ideal for most products, while aluminium models are suited for fuels and lubricants.
Technical Details:
  • Accuracy: Varies by model and rotor material, with enhanced accuracy options available.
  • Temperature and Pressure Ratings: Includes ATEX and IECEx approvals for explosion protection.
  • Noise Levels: Provided for different sizes and materials.
  • Recommended Filters: Specifications based on model.
Output Options: Various pulse and analogue output configurations, including Reed switch and Hall sensor options. High-resolution and quadrature pulse outputs are available.
U-PACE Electronics: Features flow and temperature measurement, dosing functions, and a configurable TFT display. Supports multiple output configurations and diagnostic functions.
Installation and Maintenance: Guidelines for installation, including pressure ratings for threaded and flanged versions, and details on electrical connections and protection classes.
Conclusion: The KOBOLD Positive Displacement Oval Gear Flow Meter Model DON is versatile and precise, suitable for a wide range of industrial applications involving viscous liquids. Its robust design and multiple output options make it adaptable to various operational requirements.
Additional Specifications:
  • Temperature Range: Medium temperature up to +150 °C, ambient -20 to +80 °C.
  • Housing Material: PA6 GF35 UL94 HB/VO / PC UL94 V-2.
  • ATEX Approval: Available for certain models.
Pressure Drop and Viscosity:
  • Pressure drop curves for standard and special cut rotors, with special cut rotors reducing pressure drop by approximately 50%.
  • Pressure surges over 3 bar can block gears, especially in sizes x04 to x15.
Flow Rate Multiplier: Special cut rotors recommended for viscosities over 1000 cP to reduce pressure drop. Flow rate is de-rated for higher viscosities, with specific multipliers provided.
Output Pulse Resolution: Varies by model and sensor type (Reed switch, Hall sensor, etc.).
Order Details: Options for measuring range, housing material, connection type, O-ring material, electronics, and cable entry. Specific configurations available for different flow rates and materials, with ATEX compliance options.
MFR-DO Stainless Steel Version:
  • Two-part screwed body with female thread connections.
  • Nominal pressure PN 40, temperature range -20 °C to +180 °C.
  • Materials include stainless steel body, plug, screen, and bonnet, with PTFE body seal and FPM O-ring.
Dimensions and Weight: Detailed dimensions and weights for various sizes, from DN08 to DN50.
Electronic Options: Includes electronic displays like the Zx/xA LCD display and U-PACE electronics (DON-CT) for additional functionalities.
Notes: Disclaimer on errors and specification changes without notice. Optional features like cooling fins mentioned.
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Catalog excerpts

DON-1

Positive Displacement Oval Gear Flow Meter Measuring range: 0.5 … 36 l/h und 150 … 2500 l/min OO Viscosity range: up to 1000 cP (standard) (higher with special cut rotors) OO Accuracy: ±0.2 …1% of reading OO Material: aluminium or stainless steel OO pmax: 100 bar; tmax: 150 °C OO Pulse output, LCD display, 4…20 mA, alarms, mechanical register OO Bidirectional measuring OO U-PACE electronics: temperature measuring, IO-Link KOBOLD companies worldwide: AUSTRALIA, AUSTRIA, BELGIUM, BULGARIA, CANADA, CHINA, CZECHIA, FRANCE, GERMANY, GREAT BRITAIN, HUNGARY, INDIA, INDONESIA, ITALY, MALAYSIA, MEXICO, NETHERLANDS, PERU, POLAND, Republic of Korea, SPAIN, SWITZERLAND, THAILAND, TUNISIA, turkey, USA, VIETNAM KOBOLD Messring GmbH Nordring 22-24 D-65719 Hofheim/Ts. Head Office: +49(0)6192 299-0 +49(0)6192 23398 [email protected] www.

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DON-2

Positive Displacement Oval Gear Flow Meter Model DON Operation: Liquid travels around the crescent shaped chambers created by the rotational movement of the rotors Flow Liquid entering the meas. chamber Liquid exits the measuring chamber The output signal can be processed externally via a remote display controller or PLC or via a variety of output/display options available as accessories attached to the flow meters. The positive displacement flow technology allows for precise flow measurement of most clean liquids regardless of the media conductivity. Other liquid properties also have a minimal...

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DON-3

Positive Displacement Oval Gear Flow Meter Model DON 2/04 - 2026 Maximum Pressure (threaded version) Technical Details (cont'd) Accuracy for pulse outputs or volume counter (under reference conditions*): ± 3 % of reading 0.5 - 3.6 l/h (DON-x04) ± 1 % of reading (DON-x05...DON-x15) SS-rotors: ± 0.5 % of reading with optional Z3/3A-electronics based on linearisation function) with optional Z3/3A-electronics based on linearisation function) (better accuracy for higher viscosities on request) Additional max. inaccuracy for electrical signal outputs: analog output 4-20 mA for -Lx and -Zx electronics:...

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DON-4

Positive Displacement Oval Gear Flow Meter Model DON Pulse Output (H0/HE/HA) Options H0/HE/HA are equipped with a Reedswitch pulse output and a Hall sensor pulse output. Reed switch pulse output The reed switch output is a two wire normally open SPST voltage free contact ideal for installations without power or for use in hazardous area locations when Intrinsically Safe (I.S.) philosophy is adopted. Note: when using the reed switch output the liquid temperature must not change at a rate greater than 10 ºC per minute. Average switching life of reed contact (MTTF): max. load (30 V / 10 mA) 5 x...

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DON-5

U-PACE electronics (...CT) The universal U-PACE electronics (Universal Precision and Control Electronics, order code CT) features two outputs arbitrarily configurable by the customer. In addition, the U-PACE electronics offers various diagnostic functions and the following features: • Flow- and temperature measurement • Monitoring, dosing and transmitter function • Dosing function with external control input • Coloured, multi-parameter configurable TFT-display, rotatable in 90° steps • Bidirectional measuring • Intuitive setup menu via 4 optical touch keys • 2 configurable outputs (pulse-/frequency-/alarm-...

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DON-6

Electronic with LCD Display 1 Replaces solid state outputs, for details see data sheet ZOK 2) Battery operation only applicable with the reed switch sensor of electronics options H0/HE/HA 3) Options Z5, Z6, Z7, Z8 and Z9 are shipped without batteries No responsibility taken for errors; subject to change without prior notice.

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DON-7

Positive Displacement Oval Gear Flow Meter Model DONDON Pressure Drop Curves versus Viscosity DON x04 ... x15 8 © Standard rotors 100 % of full scale (2) Standard rotors 50 °% of full scale Special cut rotors 100 %o of full scale (5) Standard rotors 25 °% of full scale Special cut rotors 50 %o of full scale © Standard rotors 12.5 °% of full scale Special cut rotors 25 %o of full scale © Standard rotors 5 %o of full scale Special cut rotors 10 %o of full scale © Standard rotors 2.5 °% of full scale Special cut rotors 5 %o of full scale DON x20 ... x60 © Standard rotors 100 %o of full scale © Standard...

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DON-8

Maximum Flowrate Multiplier (for higher viscosities) The values in above mentioned table are only approximate guidelines. The actual value for pulse rate can deviate from the values in this table and is mentioned in calibration certificate delivered with the flow meter. * The flow indicator can be reduced to a value of 0 l/min by minimizing the cutoff parameter of the U-PACE user interface. However, the accuracy of the measured value below the measuring range start value is not guaranteed. No responsibility taken for errors; subject to change without prior notice.

 Open the catalog to page 8
DON-9

Positive Displacement Oval Gear Flow Meter Model DONOrder Details (Example: DON-105H R1 1 L0 M 0) Measuring 9 = special materials (not for ATEX) Cable entry Pulse output Hall sensor (Push / Pull) / Reed switch Pulse output Hall sensor (NPN) / Reed switch, supply 5-30 Vdc Pulse output Hall sensor (Push / Pull) for pulsating flow Pulse output Hall sensor (Push-Pull), +150°C Pulse output Hall sensor (Push-Pull), high resolution (x2) Pulse output Hall sensor (Push-Pull), high resolution (x4) 2 phased outputs Hall sensor (Push-Pull) F/I transmitter, output: 4-20 mA "loop powered" analogue output LCD...

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DON-10

Positive Displacement Oval Gear Flow Meter Model DON Order Details (cont'd) (Example: DON-320H R4 1 L0 M 0) Measuring 9 = special materials (not for ATEX) Cable entry H0 = Pulse output Hall sensor (Push / Pull) / Reed switch HU14) = Pulse output Hall sensor (NPN) / Reed switch, supply B03 = Pulse output Hall sensor (Push / Pull) for pulsating flow T08) = Pulse output Hall sensor (Push-Pull), +150°C K09) = Pulse output Hall sensor (Push-Pull), high resolution (x2) G02) = Pulse output Hall sensor (Push-Pull), high resolution (x4) D0 = 2 phased outputs Hall sensor (Push-Pull) 4-20 mA "loop powered"...

 Open the catalog to page 10

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