DON
11Pages

Positive Displacement Oval Gear Flow Meter for low and high viscous liquids Measuring range: 0.5 … 36 l/h und 150 … 2500 l/min Viscosity range: up to 1000 cP (standard) (higher with special cut rotors) 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, FRANCE, GERMANY, GREAT BRITAIN, HUNGARY, INDIA, INDONESIA, ITALY, MALAYSIA, MEXICO, NETHERLANDS, PERU, POLAND, Republic of Korea, 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

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 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...

Positive Displacement Oval Gear Flow Meter Model DON Material 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 ±  3 % of reading 0.5 - 3.6 l/h (DON-x04) conditions*): ± 1 % of reading 3.6 - 36 l/h (DON-x04) ± 1 % of reading (DON-x05…DON-x15) SS-rotors: ± 0.5 % of reading (DON-x20…DON-x60) ± 0.2 % of reading (DON-x20…DON-x60; with optional Z3/3A-electronics based on...

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)...

Positive Displacement Oval Gear Flow Meter Model DON Electronic with LCD Display Model dosing unit dosing unit rate /  counter rate /  counter Power supply External Battery operation (output deactivated)2) Selectable units Decimal point Accumulative total Resettable total Rate display Input Sensors Hall sensor/ reed switch Flow rate alarm min./max. Pulse outputs with solid-state relay board with solid-state relay board with solid-state relay board Installation IP65 Cable entries Medium temperature (Option: max. +120 °C) Ambient temperature Housing material ATEX approval Replaces solid state...

Positive Displacement Oval Gear Flow Meter 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...

Positive Displacement Oval Gear Flow Meter 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 of DON-3/4/9 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. At iscosities <1000 cP these special rotors are less v accurate. 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...

Positive Displacement Oval Gear Flow Meter Model DON Order Details (Example: DON-105H R1 1 L0 M 0) Measuring range Aluminium with PPS/ PEEK12) Rotor Stainless steel St. steel with PPS/PEEK12) Rotor Cable entry O-Ring Material H0 = ulse output Hall P sensor (Push / Pull) /  R2 = G ¼ Reed switch 14) HU Pulse output Hall = N2 = ¼" NPT sensor (NPN) / Reed switch, supply 5-30 VDC R3 = G ⅜ 3) B0 = Pulse output Hall N3 = ⅜" NPT sensor (Push / Pull) for R4 = G ½ pulsating flow T08) = Pulse output Hall N4 = ½" NPT sensor (Push-Pull), H45) = G ½ (100 bar) +150°C P45) = ½" NPT K09) = Pulse output Hall...

Positive Displacement Oval Gear Flow Meter Model DON Order Details (cont'd) (Example: DON-320H R4 1 L0 M 0) Measuring range Aluminium Stainless St. steel with with PPS/ steel with PPS/PEEK12) PEEK12) rotor rotor rotor for high for high for high viscosities viscosities viscosities Cable entry O-Ring Material H0 = ulse output Hall P sensor (Push / Pull) /  Reed switch 14) HU Pulse output Hall = R2 = G ¼ sensor (NPN) / Reed N2 = ¼" NPT switch, supply 5-30 VDC 3) B0 = Pulse output Hall R3 = G ⅜ sensor (Push / Pull) for N3 = ⅜" NPT pulsating flow T08) = Pulse output Hall R4 = G ½ sensor...