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Contalitri_volumetrico_a_ruote_ovali_VZO 4_8_riels

Contalitri_volumetrico_a_ruote_ovali_VZO 4_8_riels
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Contalitri_volumetrico_a_ruote_ovali_VZO 4_8_riels - 1

• oil meter with internai threaded connections locateci on the bottoni piate • with mechanical roller counter, volume display in litres • for mounting in horizontal, vertical and inclined positions • VZOA 4 and 8 with EEC legai verifìcation Option: Reed pulser 48V CONTOIL® flow meters work on the volumetrie principle of rotary pi- ston meters (positive displacement meters).The main features ofthis me- asuring principle are large measuring ranges, high accuracy suitability for high viscosities and independence from power supply; flow disturbances do not influence proper operation. Rotary piston, guide roller and drive are the only moving parts in contact with the liquid.Their movement is transmitted by a magnetic coupling through a sealing piate.The hydraulic part is completely separated from the totalising module. Measuring error limits: Reference conditions Measuring error limits according to technical data of meter in % of actual value for the whole measuring range. Reference conditions Calibration oil similar to extra light heating oil, density at 20 °C = 814 kg/m3 Viscosity = 5.0 mm2/s according to DIN 51757 / ISO 3104 (corresponds to 4.1 mPa.s) Horizontal mounting, readings from counter CONTOIL® Oil meters are neverto be tested with water; otherwise they will get damaged. Flow rate Housing/Measuring unii__Brass___ Housing with threaded ends Cast brass___ __Spheroidal graphite iron GJS 40___ Housing with flanges Spheroidal graphite iron GJS 40 Measuring chamber___ Rotary piston__Anodized aluminium__•__• Ancillaries Plastic Riels Instruments Srl. TS +39 049 8961771 - A +39 049 7l7368 .www.riels.it. info@riels.it

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Contalitri_volumetrico_a_ruote_ovali_VZO 4_8_riels - 2

Technical data 2) I US gallon corresponds to 3.785 litres 3) For burners and engines or motors, the meter must be selected on the basis of the permanent flow rate. For higher viscosities, or if the meter is installed on the suction side, the pressure drop and any reduction in the measuring range must also be taken into consideration 4) Max. permissible error:VZO 4 Qmin 0.5:0.5 l/h ... 2 l/h = + I % /- 2 %.VZO 4: I l/h ... 2 l/h = + I % /- 2 %. 5) Note: pulses of short duration! Data according to type approvai specifications_I_VZOA 4 CE_I_VZ0A8 CE Maximum flow rate (W l/h 20 140 Nominai flow...

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Contalitri_volumetrico_a_ruote_ovali_VZO 4_8_riels - 3

Quiescent current: Switching power: Protection class: • Reed switch with dry contact (inert gas) • Max.48VAC/DC, Protection class III (SELV) • Open Contact • IP 50 (IEC 60529) against harmful dust deposits - Option: IP 54 additional against splashing water • On plug connector with cable, 3,5 - 5 mm 0

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Contalitri_volumetrico_a_ruote_ovali_VZO 4_8_riels - 4

Pressure drop curves Viscosity information Kinematic viscosity Dynamic viscosity Pascal seconds, millipascal seconds Poise, Centipoise (outmoded)_ Engler degrees °E to mPa.s: only use conversion table Saybolt units to mPa.s: only use conversion table Redwood units to mPa.s: only use conversion table Viscosity diagrams: -or a pressure drop of more than I bar; it is recommended to use the next larger meter size. Maximum permissible pressure drop = 3 bar

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