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Variable Area Flowmeter

Variable Area Flowmeter
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Variable Area Flowmeter

Product catalog summary
Operating Principle and System Configuration
The Variable Area Flowmeter V31 functions with a float and a conical glass tube, where the medium flows upwards, lifting the float to indicate flow rate. Calibration is specific to the medium's density and viscosity. Optional features include a float guide rod and limit switches for signaling specific flow rates.
Construction and Dimensions
The V31 model offers various sensor connections, including threaded, hose connector, and flange options, with weights varying by connection type.
Materials
Constructed from materials like 1.4301 stainless steel, borosilicate glass, and PVDF, ensuring durability and media compatibility.
Float Types
Available float types include unguided, guided, and viscosity-stable floats, with specific models required for certain viscosity levels.
Contacts and Limit Switches
Bi-stable magnetic contacts indicate float position without reactive contact, featuring high vibration resistance and simple connectors.
Mechanical Data
The flowmeter has a turndown ratio of 1:10, with accuracy classes of 1.6% for liquids and 2.5% for gases, designed for bottom-to-top flow.
Measuring Ranges
Standard ranges are provided for water and air, detailing pressure losses and flow rates for different float types.
Model Code and Process Connections
The V31 model code includes various meter sizes and process connections, with options for threaded, flange, and hose installations.
Specifications
  • Hose Connectors: Available in stainless steel and PVDF, with inner diameters from 19 mm to 50 mm.
  • Floats: Made from materials like 1.4571 stainless steel and PVDF, with guided, magnet, and weighted options.
  • Process Connections: Include threaded, flange, and hose connections with various materials.
Medium Compatibility
Compatible with water and air.
General Section
  • Gaskets: Options include EPDM, Viton® (FKM), and FEP/Perfluor (FFKM).
  • Electrical Outputs: Various contact and switch options for magnet-weighted floats.
  • Scales: Options include percentage and MB scales, as well as engraved scales.
  • Certificates: Compliance and acceptance certificates, including material analysis for stainless steel parts.
  • Cleaning and Testing: Options for oil and grease-free cleaning, pressure, and leakage tests according to EN 10204 standards.
  • Approvals: ATEX certifications for explosive environments, with mandatory shatter protection.
Additional Information
Contact information for Heinrichs Messtechnik GmbH is provided, with a note that specifications are subject to change without notice.
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Catalog excerpts

Variable Area Flowmeter-1

Variable Area Flowmeter V31 Heinrichs Messtechnik GmbH

 Open the catalog to page 1
Variable Area Flowmeter-2

Heinrichs Messtechnik GmbH Operating Principle and System Configuration The measuring instrument composes of a float and a conical glass tube (M) A medium flows from the bottom to the top through the measuring ring, lifting the float in the process until the buoyancy force (A) and the weight of the float (Gs) establish equilibrium. As the height of the float varies, an annular clearance (S) proportional to the flow appears between the float and the measuring tube. The height of the float (K) in the measuring tube serves as the actual rate of the flow. The flow rate is read directly from the scale....

 Open the catalog to page 2
Variable Area Flowmeter-3

Heinrichs KOBOLD Group Thread_Hose connector Flange_ Model 0AR a b SW1 SW2 G / NPT_Diameter_Form B1, PN40 RF, Class 150 Weights_Connection thread_Connection Flange

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Variable Area Flowmeter-4

Heinrichs Messtechnik GmbH Description Enclosure Measuring tube Float Stop Float O-ring O-ring Union nut Flange Flange Threaded Connection Hose Connector Bonded Connection Material 1.4301 Borosilicate glass PVDF 1.4571, AL, PVDF EPDM, Viton, FEP/FFKM EPDM, Viton, FEP/FFKM AL, Stainless Steel Stainless Steel PVDF PVDF, Stainless Steel PVDF, Stainless Steel PVC

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Variable Area Flowmeter-5

Heinrichs Messtechnik GmbH Float Types There are three types of floats on offer: A. Float without guide rod B. Guided float C. Viscosity stabile floats Float Reading Edge The following viscosity limits require a viscosity-stable float: Model S05 S06 S07 Contacts The bi-stable magnetic contacts GSGA, GSGB and GSGW serve to indicate the position of the float, thus indicating the measured value in a non-reactive, contact-free means. Features:        Bi-stable behaviour Available as normally open, normally closed or change-over No power required for operation High vibration resistance Non-reactive...

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Variable Area Flowmeter-6

Heinrichs Messtechnik GmbH GSGA – limit switches Contact closes when the value undershoots the set limit Switching principle Ambient temperature* Enclosure material Sensor material Protection class Max. switching rate Max. switching power dielectric strength Magnetic field switch, bi-stable, NC - normally closed -20 °C to +90 °C PBT / PA CuZn, Optalloy coated IP67 10 / min 50 VAC / 0,5 A / 10 W 75 VDC / 0,5 A / 10 W 230 VAC/ 400 VDC * The measuring range temperature of the flowmeter must be considered GSGB – limit switches Contact closes when the value exceeds the set limit. Switching principle...

 Open the catalog to page 6
Variable Area Flowmeter-7

Heinrichs Messtechnik GmbH Mechanical Data Measuring Range Accuracy Class (acc. VDE/VDI 3513, sheet 2) Flow Direction Materials Anzeige Ambient Conditions Process Conditions Inlet and Outlet sections Pressure Loss Turndown Ratio Smallest Measuring Range Largest Measuring Range Measuring Tube Connections Float Float Guide Gaskets Float Stop Sensor Body Shatter Protection Ambient Temperature Ambient Temperature PVC Storing Temperature Climate Classification Water Air* Water Air* *) Referred to 0 °C and 1,013 bar abs. 1,6 % 2,5 % qG 50 % From bottom to top Borosilicate glass 1,4571, PVDF, PVC 1.4571,...

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Variable Area Flowmeter-8

Heinrichs KOBOLD Group Heinrichs Messtechnik GmbH Measuring Ranges Water Standard measurement ranges for liquid with density = 1 kg/l (62,43 lb/ft3) and Viscosity 1 mPas. V31 Model Range code Pressure with and without Float PVDF weighted with Magnet. Standard measurement ranges for air at Pabs = 1,293 kg/m3, Viscosity = 0,0181 mPas Measuring Pressure Range code_Loss. Float Aluminium with and without Guide rod. Float PVDF Float Aluminium weighted with with Magnet._Float PVDF_Magnet.

 Open the catalog to page 8
Variable Area Flowmeter-9

Model Code V31 Meter Size S04 Process Connections Threaded Connection Hose Connector 62102S_Hose connector W"- inner diameter 013 mm 62102F_Hose connector W"- inner diameter 013 mm 62152S_Hose connector /"- inner diameter 019 mm 62152F_Hose connector /"- inner diameter 019 mm Installation Length Installation Length Installation Length Heinrichs KOBOLD Group Material, wetted parts Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel Material, wetted parts Stainless Steel Stainless Steel PVDF Stainless Steel PVDF Stainless Steel...

 Open the catalog to page 9
Variable Area Flowmeter-10

Heinrichs Heinrichs Messtechnik GmbH KOBOLD Group Meter Size S05 Process Connections Threaded Connection Threaded Connection Hose Connector 62102S_Hose connector W"- inner diameter 013 mm 62102F_Hose connector W"- inner diameter 013 mm 62152S_Hose connector /"- inner diameter 019 mm 62152F_Hose connector /"- inner diameter 019 mm Installation Length Installation Length Installation Length Material, wetted parts Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel Material, wetted parts Stainless Steel Stainless Steel PVDF Stainless...

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Variable Area Flowmeter-11

Process Connection Threaded Connection Hose Connection 62202S Hose connector-/" inner diameter 019 mm 62202F Hose connector-/" inner diameter 019 mm 62302S Hose connector 1" - inner diameter 025 mm 62302F Hose connector 1" - inner diameter 025 mm 62404S Hose connector 1/" - inner diameter 038 mm 62404F Hose connector 1/" - inner diameter 038 mm Installation Length Installation Length Installation Length Heinrichs KOBOLD Group Material, wetted parts Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel Material, wetted parts Stainless Steel PVDF Stainless Steel PVDF Stainless...

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Variable Area Flowmeter-12

Heinrichs Heinrichs Messtechnik GmbH KOBOLD Group Meter Size S07 Process Connection Threaded Connection Hose Connection 62604S_Hose connection 2"- inner diameter 050 mm 62604F_Hose connection 2"- inner diameter 050 mm Installation Length Installation Length Installation Length Material, wetted parts Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel Material, wetted parts Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless Steel PVDF Stainless...

 Open the catalog to page 12

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.