Series_2000_Glass_tube_Variable_Area_flowmeter
8Pages

Glass tube flowmeters Series 2000 Variable area flowmeter for low flows of liquids and gases       Short mounting length and compact especially indicated for control panels Easy installation. No straight pipe run required before or after the flowmeter Vertical mounting with upwards flow, rear connections and horizontal inlet and outlet Accurate needle valve for flow regulation included (optional without regulating valve) Scales calibrated in l/h, l/min, %, etc Flow rate: - Water: 0.1 l/h ... 1000 l/h - Air: 1 Nl/h ... 30 Nm3/h Materials: - Flow tube: borosilicate glass - Wetted parts: EN 1.4404 (AISI 316L) - Float: EN 1.4404 (AISI 316L), aluminium, glass, plastic, ceramic Local indication Options: - 1 or 2 limit

Working principle The 2000 series flowmeters work according to variable area principle, which is obtained by a float that moves inside a borosilicate glass tapered tube. The fluid flows up through the tapered tube forcing the float to a position with sufficient free area to enable the flow to pass, where there is an equilibrium of forces: - E = force of the fluid flow  Working pressure: 15 bar max.  Connections: - 2100 / 2150 / 2300: ¼” BSP / NPT - 2340: ½” BSP / NPT  Regulating valve: - Mounted on the inlet in applications for liquid and gas at atmospheric pressure - Pf = weight of...

Glass tube flowmeters Series 2000 Materials Constant flow regulator RCD / RCA Membrane body Upper connector Valve body Piston gasket Valve guide Regulating valve Upper tube gasket Upper float stop Spring support Flow tube Borosilicate glass Valve spring Membrane disk Glass / Ceramic Membrane spring Plastic / Aluminium 10 Lower float stop Connector union 11 Lower tube gasket 12 Lower / valve connector * Model 2340, without protectio

Series 2000 with constant flow regulator Flowmeter + constant flow regulator Model Constant flow regulator Flow rate l/h water * * Also for air equivalent flows, according to chart on page 5 Constant flow regulator Model

Glass tube flowmeters Series 2000 Flow ranges Flow scales, float type ECG Tube Model Nº * Also available with AC float Flow scales, float type AC, except Glass float type ECG Tube Model Nº

Constant flow regulator The 2000 series flowmeters are built to incorporate the RCA / RCD regulators, which allow keeping a constant flow when working pressure on the inlet or on the outlet are not constant. In applications for gases, model RCA is used in installations where inlet pressure changes and outlet pressure or counter pressure is constant, while model RCD is used in installations where inlet pressure is constant and outlet pressure or counterpressure changes. For liquids, model RCA is the commonly used. Operation RCA regulator: inlet pressure is variable and outlet pressure is...

Glass tube flowmeters Series 2000 Limit switches Adjustable limit switch 20-AMR (Flow rate from 10-100 l/h water and equivalent air ranges) Bi-stable SPST reed switch, actuated by a magnet inside the float and mounted in a PVC enclosure. Requires magnetic float. The flowmeters with 20-AMR switch are supplied without plastic protection.  20-AMR1 ... 2: 1 ... 2 adjustable limit switches  Imax: 0,5 A ; Vmax: 250 V ; Pmax: 12 VA  Hysteresis: ±5% of full scale value  Ambient temperature: -25ºC ... +80ºC  Suitable for hazardous area, considered as “Simple apparatus”  Available for...

Applications Measurement of hydrostatic level The measurement of hydrostatic by means of bubbling can be used for both open and pressurized tanks. In open tanks (fig. 1), the probe (not supplied) is fed a constant flow of air or neutral gas at a constant pressure and flow rate, regulated by the flowmeter series 2000+RCD. By means of a manometer (not supplied), the height of the liquid in the tank is measured. This height is equal to the pressure (mmH2O) in the probe. The measuring system is made up of: - Probe for level measurement mounted in the tank - Pressure gauge (or manometer) scaled...