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

Oval Wheel Flowmeter Model DON Principle of Operation Oval gear flowmeters are categorised as positive displacement flow technology. When liquid flows through this type of positive displacement flowmeter, two oval geared rotors measure a constant volume per rotation within a precisely machined measuring chamber. With each rotation, a constant volume of liquid is measured. The rotation of the oval gears is sensed via magnets embedded within the rotors. These magnets transmit a high resolution pulse output. The output signal can be processed externally via a remote display controller or PLC or...

Oval Wheel Flowmeter Model DONMaterial screws For aluminium housing: stainless steel (standard) steel, coated with GEoMeT® 321 (DON-A25) For stainless steel housing: stainless steel (standard) steel, coated with GEoMeT® 321 (optional) for higher pressure rating (see order details) Accuracy (under reference conditions*): ± 3 % of reading 0.5 - 3.6 l/h (DON-x04) (DON-x20...DON-x60) ± 0.2 % of reading (DON-x20...DON-x60; with optional Z3/E3-electronics based on linearisation function) Maximum Pressure (threaded version) ± 0.5 % of reading (DON-x20...DON-x60; with optional Z3/E3-electronics based...

Oval Wheel Flowmeter Model DON 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 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 (100 V / 10 mA) 5 x 105 switching cycles max. load (<5 V / 10 mA) 5 x 108 switching cycles Power supply: max. 30 VDC, max. 200 mA...

Electronic with LCD Display 1 Replaces solid state outputs, for details see data sheet ZOK 2) Battery operation only applicable with reed switch sensor »Rx« 3) Options Z6, Z7, Z8 and Z9 are shipped without batteries No responsibility taken for errors; subject to change without prior notice.

Oval Wheel Flowmeter Model DON DON Pressure Drop Curves versus Viscosity 1 1 Standard rotors 100 % of full scale Pressure drop (bar) drop (bar) Pressure Standard 2 rotors 100% Standard rotors 50 % of full scale Standard rotors 50%/Special rotors 100% special cut rotors 100 % of full scale Standard rotors 25%/Special cut rotors 50% 3 rotors 100% Standard rotors 25 % of full scale Standard rotors 25% Special cut special cut rotors 50 % of full scale Standard rotors 50%/Special Special cut rotors 10% rotors 100% 4 Special rotors rotors 50% of full scale Standard rotors 25%/Special cut 25 % Special...

Oval Wheel Flowmeter Model DON 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 flowmeter. No responsibility taken for errors; subject to change without prior notice.

Oval Wheel Flowmeter Model DON Order Details (Example: DON-105H R1 1 L0 M 0) Measuring range O-Ring Material 1 = FKM 3 = FEP-O-ring 4 = NBR 513)= Fluoro-prene® 9 = special materials (not for ATEX) Cable entry = Pulse output reed switch = Pulse output reed switch ATEX (Exd) = Pulse output Hall sensor (Push / Pull) / Reed switch = H0 + ATEX (Exd) Pulse output Hall sensor (NPN) / Reed switch, supply 5-30 VDC Pulse output Hall sensor (Push / Pull) for pulsating flow B0 + ATEX (Exd) Pulse output Hall sensor (Push-Pull), +150°C Pulse output Hall sensor (Push-Pull), high resolution (x2) K0 + ATEX (Exd)...

Technical Details MFR-DO (version stainless steel) Design: Connections: Nominal pressure: Temperature range: Mesh size: Mounting position: two-part screwed body female thread G % ... G 3 DIN ISO 228-1 PN 40 -20 °C ... +180 °C 200 mesh/75 pm for G %, G 38 100 mesh/150 pm for G %, G 1, G 1 % 40 mesh/400 pm for G 2, G 3 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 and...

Oval Wheel Flowmeter Model DON mounting surface pulse output/Lx pulse output/Lx Electronic with LCD display / Zx / Ex 21,6 21.6 with optional cooling fins Thread connection Flange connection Pulse output/Lx Pulse output/Lx Note: Dimensions for DON-2/8... are specified in ( ) only when they are different from DON-1... 10 No responsibility taken for errors; subject to change without prior notice.