Oval Wheel FIowmeter for low and high viscous liquids Measuring range: 0.5 … 36 l/h und 150 … 2500 l/min Viscosity range: 0…1000 cP (higher on request) Material: aluminium or stainless steel P ulse output, LCD display, 4…20 mA, alarms, mechanical register KOBOLD companies worldwide: ARGENTINA, AUSTRALIA, AUSTRIA, BELGIUM, BULGARIA, CANADA, CHILE, CHINA, COLoMBIA, CZECHIA, EGYPT, FRANCE, GERMANY, GREAT BRITAIN, HUNGARY, INDIA, INDONESIA, ITALY, MALAYSIA, MEXICO, NETHERLANDS, PERU, POLAND, Republic of Korea, ROMANIA, SINGAPORE, SPAIN, SWITZERLAND, TAIWAN, 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 info.de

Oval Wheel Flowmeter 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 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 effect on the performance of this type of meter. Flow profile conditioning is not required as with alternative flow technology options making oval gear installations simple to install in tight spaces and...

Oval Wheel Flowmeter Model DON Maximum Pressure (threaded version) Model DON-x55 DON-x60 with flanges, maximum pressure rating as above or as per flange rating, whichever is lower * max. pressure rating of 100 bar possible with steel screws (see order details) Recommended Filter (for example model MFR-DO...) DON-x05 ... DON-x15 <  75 μm micron (200 mesh) DON-x20 ... DON-x35 <  150 μm micron (100 mesh) DON-x40 ... DON-x60 <  350 μm micron (45 mesh) Pulse Output Reed switch pulse output (... R0 / RE) The reed switch output is a two wire normally open SPST voltage free contact ideal for installations...

Oval Wheel Flowmeter Model DON Electronic with LCD Display Model dual totaliser Dosing unit dual totaliser Selectable units Decimal point Function Power supply Battery-powered (outputs inactive) External (also for backlighting) LCD display Accumulative total Resettable total Rate display Input Un-powered sensors Reed switch Powered sensors Hall sensor Flow rate Alarm min./max. Pulse outputs Installation IP 65 Cable entries Medium temperature (Option: max. +120 °C) Ambient temperature Housing material ATEX approval No responsibility taken for error

Oval Wheel Flowmeter Model DON DON Pressure Drop Loss Curves vs Viscosity x05 /x10 Pressure drop limit verses flowrate The curves above represent the pressure drop for standard cut oval rotors. Special cut rotors option „S“ have alternate tooth relieve which effectively reduces the pressure drop by 50%. When sizing a meter, be sure your selection falls below the 1 bar maximum allowable pressure drop line on the graph. No responsibility taken for errors; subject to change without prior notice.

Oval Wheel Flowmeter Model DON Maximum Flowrate Multiplier (for higher viscosities) Viscosities (cP) Standard rotor Special cut rotors for higher viscosities For viscosity > 1000 cP, special cut rotors option "S" should be used to reduce pressure drop. This applies to DON-x15 and larger sizes. For higher viscosities, the flowmeter max. flowrate is de-rated according to the attached chart. Example: DON-x25 measuring oil at 8000 cP, max. flow 150 l/min x 0.5 = 75 l/min new maximum flow rate. Output Pulse Resolution Pulse/litre Measuring range [l/min] Quadr. hall sensor Dx Hall­ sensor, high-resolution...

Oval Wheel Flowmeter Model DON Order Details (Example: DON-105H R1 1 L0 M 0) Measuring range [l/min] Housing material4) Aluminium with PPS Rotor Stainless steel St. steel with PPS Rotor Cable entry O-Ring Material Reed switch pulse R0 = output RE = eed switch pulse R output ATEX (Exd) R4 = G ½ H0 = all sensor (PushH N4 = ½" NPT Pull)/ Reed switch, 5) = G ½ (100 bar) DON-120H DON-220H DON-820H H4 pulse output P45) = ½" NPT HE = H0 + ATEX (100 bar) B03) = or pulsating flow f BE3) = B0 + ATEX (Exd) R6 = G 1 T08) = all sensor (PushH N6 = 1" NPT Pull), +150°C, F6 = DIN flange, pulse output PN 16/40...

Oval Wheel Flowmeter Model DON Technical Details MFR-DO (version stainless steel) Design: two-part screwed body Connections: female thread G ½ ... G 1 DIN ISO 228 T1 Nominal pressure: PN 40 Temperature range: -30 °C ... +160 °C (air) Mesh size: 200 mesh/75 µm for G ¼, G 3⁄8 100 mesh/150 µm for G ½, G 1 Mounting position: cover toward bottom, note specified direction of flow Materials Body (1): Plug (2): Screen (4): Bonnet (9): Body seal (11): O-ring (31): stainless steel 1.4408, EN1503-1 stainless steel 1.4408, EN1503-1 stainless steel 316 stainless steel 1.4408, EN1503-1 PTFE FPM Dimensions...

Oval Wheel Flowmeter Model DON mounting surface pulse output pulse output Electronic with LCD display / Zx / Ex 21,6 with optional cooling fins 13 Thread connection Flange connection Pulse output Pulse output Note: Dimensions for DON-2/8... are specified in ( ) only when they are different from DON-1... No responsibility taken for errors; subject to change without prior notice.