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mini CORI-FLOW Compact Coriolis Mass Flow Meters & Controllers for mini CORI-FLOW

Facts about Coriolis Flow Measurement and Control 3 Mass Flow Meters 4 Mass Flow Controllers 8 Liquid Dosing Systems 10 Model number identification 15

Facts about Coriolis Flow Measurement and Control Coriolis principle of operation In 1835 Gaspard-Gustave Coriolis, a French scientist, described the effect that moving objects deflect from a straight path when they are viewed from a rotating frame of reference. In the nineteen seventies the “Coriolis effect” started to find applications in mass flow meters: a fluid flows through a vibrating tube and causes changes in frequency, phase shift or amplitude, proportional to the mass flow through the tube, giving the density of the fluid as secondary output. The mini CORI-FLOW® solution Coriolis...

mini CORI-FLOW® Mass Flow Meters General mini CORI-FLOW® series by Bronkhorst Cori-Tech B.V. are precise and compact Mass Flow Meters and Controllers, based on the Coriolis measuring principle. Designed to cover the needs of the low flow market, there are 3 models to overlap flow ranges from 5 g/h up to 30 kg/h (full scale values), each offering “multi-range” functionality: factory calibrated ranges can be rescaled by the user, maintaining the original accuracy specs. As a result of this, customers are able to reduce the variety of instruments and thus reduce the cost of ownership. The...

Application on liquids mini CORI-FLOW® can be applied for most liquid types. The mass flow meters are fully metal sealed, controllers have a high performance elastomeric valve seat, made of Kalrez. High accuracy Coriolis flow meters are unmatched in accuracy. When applied for liquids, the mass flow accuracy is better than ±0,2% Rd. The trumpet graph below illustrates the total mass flow accuracy of an M13 Mass Flow Meter used on liquid. Total accuracy M13 on liquid (±0,2% Rd + ±0,2 g/h ZS) mini CORI-FLOW® Mass Flow Meter with local readout module, Pressure drop sensor for water (at 20°C)...

mini CORI-FLOW® Mass Flow Meters In comparison with thermal mass flow devices, the Coriolis measuring principle offers the following advantages: • no conversion factors (if scaled in units of weight) • possibility to measure unknown fluids or variable mixtures • can measure (super-) critical gases • superior accuracy and response time For gas flow applications, the mass flow accuracy is better than ±0,5% Rd. The trumpet graph below illustrates the total mass flow accuracy of an Ml 3 Mass Flow Meter used on gas. Dimensions Mass Flow Meter mini CORI-FLOW When engineering your process system...

Approx. maximum gas flow rates as function of various inlet pressures (P2 = 1 bara and T = 20°C) Notes: (1) For all gas flow values the measuring error is ±0,5% Rd ± zero stability (2) “Liquid”: Fluid will be in liquid phase under certain conditions: not recommended; phase changes in instrument should be avoided! (3) For a gas flow meter the maximum flow will decrease with increasing back pressure. (4) For a gas flow controller the maximum flow under the same operating conditions will be approx. 0,75 times the indicated flow rate for a meter. For example: The maximum flow through an M13...

mini CORI-FLOW® Mass Flow Controllers General The pc-board of a mini CORI-FLOW® Mass Flow device features integrated, adaptable PID control for fast and smooth control of any electronically driven control valve. Depending on the application this could be an integrated direct acting valve or a separately mounted valve for special tasks, e.g. a pressure actuated control valve. Integrated control valves for liquid applications have a purge connection on top of the sleeve that enables easy elimination of air or gas when starting up the system. For liquid dosing Bronkhorst Cori-Tech offers an...

mini CORI-FLOW® Mass Flow Controllers Pressure drop Mass Flow Controllers Dimensions Mass Flow Controller As a rule of thumb the pressure difference (ΔP) across the control valve should be at least 50% of the total ΔP across the system for liquid applications, for gases preferably even higher (approx 75%). Close-coupled control valves For control applications normally an MFC with integrated control valve will be preferred, because it is the most compact and economical solution. Sometimes, however, a separate control valve could be more practical or offer technical advantages. This could be...

mini CORI-FLOW® Liquid Dosing Systems, using flow meter controlled pumps An alternative way of control In some applications it is not possible or not recommended to use a control valve, for instance when a vessel with liquid cannot be pressurised. As an alternative, Bronkhorst Cori-Tech can offer virtually pulse-free gear pumps, close-coupled to the Coriolis flowmeter. Liquid dosing system A mini CORI-FLOW® liquid dosing system consists of a Coriolis flow meter, a gear pump, a filter, a check valve and interconnecting material. Furthermore Bronkhorst Cori-Tech will take care of electrical...

mini CORI-FLOW® Applications Gas or liquid precursor delivery In deposition processes various precursor fluids must be accurately controlled, either in gas phase or as a liquid. The high precision Mass Flow Controllers of the mini CORI-FLOW® series are particularly suitable for these demanding applications. Thanks to the “multi-range” feature, Original Equipment Manufacturers (OEM customers) are able to drastically reduce the variety of spare instruments and thus the cost of ownership, since the instruments are easy to re-range. mini CORI-FLOW® for additive dosage Many applications ask for...

mini CORI-FLOW® Applications Supercritical gas measurement and control Fluids like carbon dioxide (CO2) and ethylene (C2H4) are difficult to measure when they move towards the inter-phase stage between being a liquid and a gas. For example, for CO2 this occurs at temperatures >20°C and pressures higher than approx. 30 bara. Under these conditions, physical properties like density (ρ) and heat capacity (Cp) change very rapidly as a result of pressure or temperature variations. This makes an accurate mass flow measurement, based on the thermal principle, very difficult. in liquid phase or...