Variable Area Flowmeters

Since 1921, the name KROHNE has not only stood for innovative and reliable process measuring technology solutions, but also for exact, reliable and long-lasting variable area measuring technology.

To get more information please expand the product block by pressing on image or product title. To get detailed information about specific product you can download Technical datasheet file by clicking corresponding link.

Variable Area Flowmeters

The range of applications spans from hygienic and aseptic applications for the food industry, the pharmaceutical industry and medical technology, for which the world's only metal variable area flowmeter with EHEDG certification is used, right down to usage in the chemical and water industry or industrial forges and furnaces.

H250 M40
The all-metal variable area flowmeter H250 is used for flow measurement of conductive andnon-conductive liquids, gases and vapours.
Highlights indicator/transmitter M40 Simple, low-cost installation: Measure and display without auxiliary power supply Unique modularity to adapt to customer-specific applications limit switches (NAMUR, 3-wire transistor or reed contacts) 2-wire analog output 4…20mA with HART Foundation Fieldbus / Profibus PA interface Graphical LC display with flow counter and pulse output Universal ex-concept: Flameproof and intrinsically safe Ingress protection IP66/68, IP69K, NEMA 4x/6 Any meter orientation possible: vertical, horizontal or in fall pipes Highlights H250 measuring cone Sturdy stainless steel construction for high operating pressure up to 3000 bar and extreme process temperatures from -200°C to +400°C Optionally available with PTFE/ceramic liner for acids and alkalis High application security, even with extremely small flows Excellent long-term stability Upper limit of measurement for liquids: 10 to 120,000 l/h (water: 20°C) Upper limit of measurement for gases: 0.7 to 2800 m3/h (air: 20°C, 1.013 bar) Measuring range 10:1 (optional 100:1) Accuracy: 1.6 % according VDI/VDE 3513-2 (qG = 50%) Many different process connections Flanges as per EN (DN15-DN150), ASME and JIS Screw and clamp connections, welding ends et al. Special design for the food and pharmaceutical industry with EHEDG approval Company offers H250 series models: H250 M8, H250 M9, H250 M10. Techical datasheet : H250 M40.pdf

VA 40
The VA40 flowmeter is suitable for measuring the flow rate of liquids or gases.
Highlights Simple, low-cost measuring principle without auxiliary power Stainless steel fittings: other materials optional Thread, flange, hose or clamp connection Process temperatures: -20°C to +100°C Operating pressure up to 7/10 bar (depending on DN) Upper limit of measurement for liquids: 0.4 to 10,000 l/h (water: 20°C) Upper limit of measurement for gases: 7 to 310,000 l/h (air: 20°C, 1.013 bar) 2 limit switches Accuracy 1.0 % of measured value acc. VDI/VDE 3513-2 (qG=50%) Use in hazardous areas (ATEX) Special food and pharmaceutical variant Food and pharmaceutical design Smooth stainless steel surfaces featuring a surface roughness of the components in contact with the medium of <0.8 µm make it difficult for deposits to form and are easy to clean.There are suitable connections and FDA conforming materials for the food and pharmaceutical industry. Techical datasheet : VA40,45.pdf

VA 45
The VA45 flowmeter is suitable for measuring gases at low operating pressures.
Flowmeters especially for gases The VA 45 variable area flowmeters were designed to measure gases. They can be used, for example, in industrial ovens, forges and furnaces, and protective gas and heating systems. The standardized device design is available with various connections that conform to standards. The glass measuring cone, protected by a metal sleeve with a viewing glass, makes it easy to read the flow directly. Highlights Simple, low-cost measuring principle without auxiliary power Stainless steel fittings: other materials optional Thread, flange or hose connection Process temperatures: -20°C to +100°C For measuring gases at low operating pressure up to 1 bar Upper limit of measurement for gases: 1.5 to 75 m3/h (air: 20°C, 1.013 bar) Accuracy 2.5 % of measured value acc. VDI/VDE 3513-2 (qG=50%) Suitable for measuring gases in accordance with DVGW process sheet G 260 Connector variants Techical datasheet : VA40,45.pdf

DK 32
Solid metal DK flowmeters are suitable for measuring the flow rate of liquids, gases and vapors. Because of their robust design the flowmeters are particularly suited for difficult operating and environmental conditions. DK32 is designed with horizontal connections, with valve.
Small flowmeters (metal) The DK 32 variable area flowmeters are versatile and can be used for gases and liquids. Highlights Simple and low-cost measuring principle without auxiliary power Materials in contact with the medium: Stainless steel, optional: Hastelloy, Monel, titanium Process temperatures from -80°C to +150°C Operating pressure up to 130 bar Upper limit of measurement for liquids: 1.6 to 160 l/h (water: 20°C) Upper limit of measurement for gases: 16 to 4,800 l/h (air: 20°C, 1.013 bar) 2 limit switches SIL 2 compliant acc. IEC61508 Accuracy 4.0 % of measured value acc. VDI/VDE 3513-2 (qG=50%) Approved for hazardous areas in accordance with ATEX, FM, NEPSI Ingress protection IP66/68 (IP65 with limit switches) Many different process connections Techical datasheet : DK32,34,37.pdf

DK 34
Solid metal DK flowmeters are suitable for measuring the flow rate of liquids, gases and vapors. Because of their robust design the flowmeters are particularly suited for difficult operating and environmental conditions. DK34 is designed with vertical connections, without valve.
Small flowmeters (metal) The DK 34 variable area flowmeters are versatile and can be used for gases and liquids. Highlights Simple and low-cost measuring principle without auxiliary power Materials in contact with the medium: Stainless steel, optional: Hastelloy, Monel, titanium Process temperatures from -80°C to +150°C Operating pressure up to 130 bar Upper limit of measurement for liquids: 1.6 to 160 l/h (water: 20°C) Upper limit of measurement for gases: 16 to 4,800 l/h (air: 20°C, 1.013 bar) 2 limit switches SIL 2 compliant acc. IEC61508 Accuracy 4.0 % of measured value acc. VDI/VDE 3513-2 (qG=50%) Approved for hazardous areas in accordance with ATEX, FM, NEPSI Ingress protection IP66/68 (IP65 with limit switches) Many different process connections Techical datasheet : DK32,34,37.pdf

DK 37
Solid metal DK flowmeters are suitable for measuring the flow rate of liquids, gases and vapors. Because of their robust design the flowmeters are particularly suited for difficult operating and environmental conditions. DK37 has an increased measurement accuracy and larger indication.
Small flowmeters (metal) The DK 37 variable area flowmeters can either be equipped with a mechanical or electronic indicator and are suitable for measuring gases and liquids. Highlights Materials coming into contact with the medium: Stainless steel, optional: Hastelloy, Monel, titanium Process temperatures: -80 to +150°C (-25 to +135°C for el. indicator) Operating pressure up to 130 bar Upper limit of measurement for liquids: 1.6 to 160 l/h (water: 20°C) Upper limit of measurement for gases: 16 to 4,800 l/h (air: 20°C, 1.013 bar) 2 limit switches or mA analog output SIL 2 compliant acc. IEC61508 Accuracy 2.5 % of measured value acc. VDI/VDE 3513-2 (qG=50%) Approved for hazardous areas in accordance with ATEX, and NEPSI Ingress protection IP66 Many different process connections Techical datasheet : DK32,34,37.pdf

DK 46...800
The DK46...DK800 flowmeters are suitable for measuring the volume flow rate of liquids and gases.
Small flowmeters (glass) The DK 46, DK 47, DK 48 and DK 800 variable area flowmeters feature glass cones of varying lengths for different accuracy requirements. Highlights Simple, low-cost measuring principle without auxiliary power Stainless steel, brass or PVDF fittings Needle valve in foot or head piece Process temperatures: -5°C to +100°C Operating pressure up to 10 bar Upper limit of measurement for liquids: 0.4 to 160 l/h (water: 20°C) Upper limit of measurement for gases: 5 to 5,000 l/h (air: 20°C, 1.013 bar) 2 limit switches (ring initiators) Accuracy 1.0 % - 4.0% of measured value acc. VDI/VDE 3513-2 (qG=50%) (depending on length of cone) Use in hazardous areas (ATEX) Many different process connections Techical datasheet : DK46,47,48,800.pdf

Other products from this manufacturer

Electromagnetic Flowmeters Variable Area Flowmeters (this page)Ultrasonic Flowmeters Mass Flowmeters Other Flowmeters and Controlers Non-Contact Level Meters Contact Level Meters Other Level Meters OPTIQUAD Analysis Measurements OPTISENS Analysis Measurements Temperature Measurement Pressure Measurement

Industries

Products

Brands

Variable Area Flowmeters

Variable Area Flowmeters

H250 M40

VA 40

VA 45

DK 32

DK 34

DK 37

DK 46...800

Other products from this manufacturer