High-Tech Flowmeter for Liquids

Technical specification Material: Housing: injection-molded: high-quality PP... more

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Technical specification

Material:

Housing: injection-molded: high-quality PP (polypropylene), PVDF (polyvinylidene fluoride) or PFA (perfluoroalkoxy). PFA = „extrudable PTFE", highly resistant

O-rings: highly loadable FPM (fluorinated rubber) with high swelling resistance to mineral oils

Needle valve: PCTFE (polychlorotrifluoroethylene) with very good chemical resistance to aggressive media

Measuring tube: borosilicate glass

Protective pipe: acrylic glass

Cone float: stainless steel

Flow range: is defined individually. When ordering please specify the following data: medium, flow range, temperature, pressure, density, viscosity

Max. temperature: +70 °C

Max. operating pressure: 3 bar

Accuracy: flowmeters are calibrated individually in case of critical media

General Information The flowmeters EMP-4 operate in accordance with the float measuring... more

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General Information

The flowmeters EMP-4 operate in accordance with the float measuring principle. At constant flow speed, the float in the conical measuring tube comes to rest as soon as the resistibility / flow force compensates, at the corresponding cross section, the inertial forces acting on the float. When the flow speed changes, e.g. by pressure change, the float moves freely up and down until the resistibility, altering with the free cross-sectional flow area, has stabilized at the value of inertial forces and an equilibrium of forces is again prevalent. The position of the float reached in this manner corresponds to a specific volumetric flow and is indicated as flow rate on the scale printed on measuring tube.

Precisely operating, compact flowmeters with measuring tube, needle fine regulating valve and connecting fittings as complete unit.

Housing parts are made of high-quality plastics and injection-molded.

The very accurate reading is enabled by a calibrated ribbed measuring tube, through which the ball float (for measurement of gases) or cone float are precisely conducted.

A pipe of acrylic glass protects the measuring tube against contaminations and break.

The fine regulating valve allows the exact adjustment of very small measuring intervals.

The flowmeters are supplied alternatively with or without annular proximity switch (flow controller).

Standardly, the flowmeters are fitted with screw-in tubing joints accepting tubes and pipes made of PP (polypropylene), PVDF (polyvinylidene fluoride) or PFA (perfluoroalkoxy) with inside diameter of 4 mm and outside diameter of 6 mm. Alternatively, these connections can be replaced by other fittings accepting tubes or pipes with different outside diameters. The screw joint bodies are screwed into an internal thread G.

Connections with bulkhead nut for wall mounting or control panel mounting.

Rear connections allow a close alignment of the flowmeters.

The measuring tube consists of pure DURAN glass of highest quality.

Accuracy class of the glass tube 2.5 according to VDI / VDE

Very good corrosion resistance to most measuring media except to hot, concentrated alkalis and hydrofluoric acid.

Due to its high boric oxide content (BO₃) the DURAN glass exhibits a high thermal shock resistance, which is reflected in an extremely low linear expansion coefficient of k = 3.2 * 10^-6 m/K.

Four different measuring tubes with diameters of 10, 17 and 28 mm and lengths of 75 and 150 mm offer numerous solutions for a wide variety of applications.

Item	Measuring range liquids¹ l/h	Ø-Messrohr mm	Länge Messrohr mm	Werkstoff	Innengewinde	Einheit Stück	Price Euro*
305054	2,5 - 25	17	75	PP	G 1/4"	1	328.00
305055	2,5 - 25	17	75	PVDF	G 1/4"	1	356.00
305056	2,5 - 25	17	75	PFA	G 1/4"	1	388.00
305062	4 - 40	17	75	PP	G 1/4"	1	328.00
305063	4 - 40	17	75	PVDF	G 1/4"	1	356.00
305064	4 - 40	17	75	PFA	G 1/4"	1	388.00
305070	10 - 100	17	75	PP	G 1/4"	1	328.00
305071	10 - 100	17	75	PVDF	G 1/4"	1	356.00
305072	10 - 100	17	75	PFA	G 1/4"	1	388.00
305078	25 - 250	28	150	PP	G 1/2"	1	893.00
305079	25 - 250	28	150	PVDF	G 1/2"	1	972.00
305080	25 - 250	28	150	PFA	G 1/2"	1	1,015.00
305086	60 - 600	28	150	PP	G 1/2"	1	893.00
305087	60 - 600	28	150	PVDF	G 1/2"	1	972.00
305088	60 - 600	28	150	PFA	G 1/2"	1	1,015.00