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: -

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 moving the float to a height with sufficient free area to enable the flow to pass, where there is an equilibrium of forces: - E = force of the fluid flow - Pf = weight of the float - Al = free area of flow (Al = Ac, tube area, - Af, float area) Each position of the float corresponds to a value of flow rate. • Working pressure: 15 bar max. • Connections: - 2100 / 2150 / 2300: W” BSP...

Glass tube flowmeters Series 2000 Materials Membrane body Upper connector Valve body Piston gasket PTFE / VITON® Valve guide Upper tube gasket Regulating valve 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

Models 2100 / 2150 / 2300 Model 2340 Series 2000 with constant flow regulator BSP/NPT kg Constant flow regulator Flowmeter + constant flow regulator Flow rate R” * Also for air equivalent flows, according to chart on page 5 Constant flow regulator Model RCA RCD RCA * RCD

Tube length mm

Constant flow regulator The 2000 series flowmeters can 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 constant. The fluid...

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: 0.8 A ; Vmax: 250 V ; Pmax: 80 W  Hysteresis: ±5% of full scale value  Ambient temperature: -25ºC ... +80ºC  Suitable for ATEX hazardous area “Simple apparatus”  Available for models 2100 and 2150...

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: Air - Probe for level measurement mounted in the tank - Pressure gauge (or manometer) scaled in...