Covol Oscillating Piston Flow Meters
12Pages

COVOL Series Volumetric Counters Working pressure manufacturing according to PED 97/23/CE (Lloyd’s Register Certificate Nº 031) • • • • • • • • • • • • Volumetric counter for liquids Precision ± 0.8% Construction in EN 1.4404(SS 316L), PVC, PP, PTFE DN 10 to DN100 Viscosity up to 120.000 mPas. It can be easily cleaned and sterilized It will work in any position Mounting by means of steel PN16 EN 1092-1 standard flanges, ANSI flanges, NPT threads and sanitary connections on demand High pressure versions available on demand It can be mounted in hazardous areas (intrinsically safe) Complete range of electronic equipment available for counting, analog outputs etc. It does not need straight sections of pipe Suitable for: • • • • Filling containers Batching and mixing Vapour condensation and fuel consumption metering Installation: - Counter and valves in the work area with protection according to the zone classification - Counter in the safe area and valves in the hazardous area - Full discharge pipe with air bleed or empty discharge pipe

By means of an oscillating piston and an annular metering The drawings show how the piston is moved by the liquid as it flows through the metering chamber. The piston contains a magnet which acts on an exterior reed switch once for each complete cycle. The electric pulses are the input for the control equipment The flow of a liquid through the COVOL volumetric counter exercises a pressure on the piston wich starts the metering In this position the liquid is filling the Technical Data • Pipe connections Standard: EN 1092-1 steel flanges for PN16 On demand: ANSI flanges, BSP threads, NPT,...

Construction Detail Cavitation should not occur in the counter, and to avoid this we must follow the A.P.I. 2534 norm, which states that "at the outlet of counters the pressure should be higher than twice the pressure loss of the counter plus 1.25 times the vapour pressure of the liquid or its most volatile component". Important: The installation of the cable between the COVOL and electronic equipment should not pass near mains or power cables in order to avoid picking up interferences wich may influence the electronic counters. The COVOL volumetric counters are calibrated using water...

Flow rate graph Variations of Ap m H20 with viscosity Variations of viscosity modify the pulses per litre factor of the counter but it does not affect the repeatability. As a general norm, the variations of density and viscosity only affect the COVOL counters at the beginning of the working range. When the density and viscosity is less than 1 kg/I and 1 mPa-s the flow rate must be higher to start to move the piston, and with the density and viscosity greater than 1 kg/I and 1 mPa-s the flow rate will be lower to start to move the In any case, the variations in density do not produce...

Pressure loss at Qmax for all models = 3 m H20 INOX* PVC/PTFE INOX* PVC/PTFE INOX* PVC/PTFE

Thread connection With Explosion Proof Standard Connector

Thread connection-High Pressure With Explosion Sanitary connections, with Explosion Proof enclosure and Standard connections exterior tubo

CIP, CIP II Compact mounted Covol volume Compact system featuring: • Covol body and electronic counter mounted together to form a compact unit. • Same flow rates, pressures and other working conditions • CIP electronic counter mounted in IP65 housing with an injected aluminium base and U.V. treated polycarbonate cover. • Programmable pulses/unit factor. • Button battery power supply lasts for 30.000 hours • CIP: 7 digit, 9 mm digit size • CIP II: 7 digit, 8 mm digit size for totalizer counter 5 digit, 6 mm digit size for partial counter • Counter reset by means of internal push button or...

Flow Transmitters and Volume Counters • HART protocol communications, for models • Connects directly to a COVOL or TM-44 turbine • CH420Lfor compact mounting (local) • Programmable pulses/litre • Programmable beginning and end of analog scale • Selection of various types of units for flow rate Power supply from two wire current loop Current consumption: less or equal to 20 mA Totalizer: 7digits, 8 mm digit size Flow rate: 5 digits, 6 mm digit size Totalizer reset by means of a push button

DFD-2 Series Electronics Frequency Dividers The DFD-2 Series are rail mounting (DIN 46277) micro- processor based control instruments for frequency division. They are fully user programable and will adapt directly to any TM-44 turbine, COVOL output, or equivalent pulse generating output transducers. • Automater process control in any industry with batching or volume control for interfacing with PLC • Interface with slow scanning PLC inputs • Interface with PLC without calculations capacity • Interface with simple counters • Interface for electromechanical totalizing counters • Direct...

Dimensions: Series DFD-2 (rail DIN 46277) INPUT OUTPUT Covol Volumetric Counter Applications Tank Filling Batch Control Chemical Dosing Energy Management Fisical Monitoring Closed Systens Open Systems Acetic Acid Ammonia Liquids Ammonium Nitrate Demineralised Water Food products (Cream, Syrups, Fruit, Chocolate, Juicea, Vinegar, Wine) Food Oils Hidraulic Oils Hidrochloric Acid Industrial Water Liquid Helium Magnesium Sulphate Methylated Spirits Mineral Oils Molten Sulphur Nitric Acid Organic Products Oxigen (Liquidfied) Oxigenated Water Phosohoric Acid Sulphuric Acid Tributyl Phosphate...