Oval wheel meter

Volume measurement of liquids and liquid gases in loading applications of the chemical and petrochemical industry, petroleum industry and of food and beverages:

  • in the oil industry for the measurement of crude oil or refined products or in the gas industry for the measurement of liquid gas
  • in dosing and loading technology for the measurement of defined quantities of various fuels and additives
  • in the petrochemical industry for measuring products such as ethylene or propylene liquid
  • in the chemical industry for measuring various acids or alkalis
  • in mechanical and apparatus engineering for measuring lubricants or process fluids
  • in shipbuilding for measuring fuel consumption
Characteristics

high measurement accuracy
Single Case Oval wheel meter:
accuracy:         Flowal® Plus up to ±0.25%
accuracy:         OI up to ±0.1%
Double Case Oval wheel meter:
accuracy:         OP up to ±0.15%
accuracy:         OaP up to ±0.05%

Special features
  • mechanical or electronic counters available
  • no inlet and outlet sections required
  • wide viscosity range
  • simple installation and commissioning
  • maintenance-free
  • national and international approvals
  • custody transfer certificates / OIML / MID 2014/32/EU
    (old version: 2004/22/EG)
  • Evaluation Certificate (Welmec 8.8)
  • SIL 2 (OaP series)
  • Llyods Register (OI, OaP)
  • approved for use in legal metrology
  • ATEX
  • PED
  • NACE
Technical data in general
Nominal size6 to 400 mm (1“ bis 16“)
Process connectionFemales threading
Flange according to DIN or ANSI
Material

Pressure relevant: cast steel, stainless steel, PVDF

Other wetted parts: PEEK, aluminum; brass, ceramics, stainless steel, others

Flow Range0,03 l/min to 24.000 l/min
(0.008 gal/min to 6,340 gal/min)
Accuracy±0,05% to ±0,5%
Repeatability±0,02%
Viscosity0,1 to 100.000 mPa·s
Process temperature-40°C to 290°C (-40°F to 554°F)
Process pressuremax. 100 bar bar (1,450 psi)
Ex-protectionFlame proof or intrinsically safe

Oval wheel meter products

Oval wheel meter series OaP

Application:

Oval Wheel Meters Type OaP / OP are used for measuring liquid raw, intermediate and finished products such as liquefied gases, gasolines, heating oils, lubricating oils, transmission oils, solvents, bitumen, alkaline solutions, acids and other chemical liquids.

Characteristics
  • oval wheel meters for  low- , mid-, and high viscosity liquids
  • high measurement accuracy
  • low pressure loss
  • high life time
Special Features
  • double case meter Design
  • no straight inlet and outlet pipe sections required
  • measuring principle independent of the viscosity
  • compact design
  • easy start-up
  • maintenance-free
  • the only SIL 2 oval wheel meter world wide
  • broad range of custody transfer approvals
Technical data
Nominal size25 to 400 mm (1/4“ bis 16“)
Process connectionFlanges according to DIN or ANSI
Material

Pressure relevant: cast steel

Other wetted parts: aluminum; brass, stainless steel, others

Flow Range300 l/h to 24.000 l/min
(79 gal/h to 6,340 gal/min)
Accuracy±0,05% to ±0,5%
Repeatability±0,02%
Viscosity0,1 to 100.000 mPa·s
Process temperature-40°C to 290°C (-40°F to 554°F)
Process pressuremax. 100 bar (1,450 psi)
Ex-protectionFlame proof or intrinsically safe
  • Oil and Gas
  • Chemistry and pharmaceutical
  • Mechanical and plant engineering
  • Energy and power plants
  • Shipbuilding
OIML
Lloyds Register
Nmi
PTB

Oval wheel meter series OP

Application:

Oval wheel meters type OP are used for measuring liquids such as gasolines, heating oils, lubricating oils, diesel oil, bio ethanol and some chemical liquids.

Characteristics
  • oval wheel meter for mid to high viscosity liquids
  • low pressure loss
  • high life time
Special features
  • Double case meter design
  • no straight inlet and outlet pipe sections required
  • measuring principle independent of the viscosity
  • easy start-up
  • maintenance-free
Technical data
Nominal size15 to 150 mm (1/2“ bis 6“)
Process connectionFlange according to DIN or ANSI
Material

Pressure relevant: cast steel, stainless steel,

Wetted parts: aluminum or stainless steel

Flow Range5 l/h to 5.000 l/min
(1.32 gal/min to 1,320 gal/min)
Accuracy±0,02% to ±0,5%
Repeatability±0,02%

option special calibration: ±0.15%

Viscosity0,3 to 120 mPa·s
Process temperature-10°C to 110°C (14°F to 230°F)
Process pressuremax. 400 bar (580 psi)
Ex-protectionFlame proof or intrinsically
  • Oil and Gas
  • Chemistry and pharmaceutical
  • Mechanical and plant engineering
  • Energy and power plants
  • Shipbuilding
OIML
PTB

Oval wheel meter series OI

Application:

Oval wheel meters type OI are used for the measurement of liquid products such as liquefied gases, acids, alkaline solutions, fats, alcohols, solvents, dispersions, polymers, poly-condensates, paints, colors and adhesives etc.

Characteristics
  • oval wheel meters for mid to high viscosity liquids
  • high measurement accuracy
  • low pressure loss
  • high life time
Special features
  • single case meter Design
  • no straight inlet and outlet pipe sections required
  • measuring principle independent of the viscosity
  • compact design
  • easy start-up
  • maintenance-free
Technical data
Nominal size25 to 100 mm (1“ bis 4“)
Process connectionFlanges according to DIN or ANSI
Material

pressure relevant: cast steel, grey cast iron, stainless steel
wetted parts: aluminum; brass, cast iron

Flow Range

8 l/min to 1,000 l/min

(2 gal/h to 264 gal/min)

Accuracy±0,01% to ±0,3%
Repeatability±0,02%
Viscosity

0,3 to 3.000 mPa·s (standard)
1,5 to 60.000 mPa·s (ball bearing)

Process temperature

-60°C up to 180°C (-76°F to 356°)

High temperature design: special clearances / extension 300 mm

Low temperature design: special clearences / extension 400 mm + 2 magn. coupling / pmax  = 0.5 x PN

Process pressuremax. 40 bar (580 psi)
Ex-protectionFlame proof or intrinsically
  • Oil and Gas
  • Chemistry and pharmaceutical
  • Mechanical and plant engineering
  • Food and beverage
  • Energy and power plants
  • Shipbuilding
OIML
PTB

Oval wheel meter series Flowal® Plus

Application:

Versatile flowmeter for measuring the volume of liquids in mechanical engineering, factory automation and process instrumentation, such as suited for industrial fluids, chemical fluids, mineral oils and fuels. The modular design combines reliable mechanical sensors with modern electronics. The plastic version is suitable for measuring the volume of corrosive liquids, acids, alkalis, solvents, dyes…

Characteristics
  • oval wheel meters for low to mid viscosity liquids
  • battery powered model available
  • low pressure loss
Special features
  • single case meter design
  • no straight inlet and outlet pipe sections required
  • measuring principle independent of the viscosity
  • easy start-up
  • maintenance-free
  • plastic version: no wetted metal parts and low weight
  • built-in temperature sensor
  • battery-supplied compact devices
  • detection of flow direction
Technical data
Nominal size

G1/4“, G1/2“, G3/4“, G1“, G2“
Flanges DN15, DN25, DN50
Flanges ½“, 1“, 2“

Process connection

Inside threads according to ISO 288
Flanges according to DIN or ANSI

Material

pressure relevant: stainless steel, aluminum, PVDF, PP

other wetted parts: PEEK; stainless steel

Flow Range0,03 l/min to 660 l/min
Accuracy±0,25% to ±0,5%
Repeatability±0,02%
Viscosity

0,3 to 3.000 mPa·s

Process temperature

-40°C up to 130°C
(-40°F up to 266°F)

Process pressureup to 68 bar (986 psi)
Ex-protectionintrinsically safe (ATEX or IEC-Ex)
  • Oil and Gas
  • Chemistry and pharmaceutical
  • Mechanical and plant engineering
  • Food and beverage
  • Shipbuilding

Oval wheel meter series OD

Application:

The focus is on the measurement of non-conductive liquids. This meter is designed for the measurement of e.g. oil or demineralized water. Due to the measuring principle, an inlet or outlet section is not required.

Characteristics
  • direct measurement of volume
  • measurement of non-conductive and conductive liquids
  • high accuracy / repeatability also for small quantities
  • high long-term stability
Special features
  • Fillings from 10 ml possible
  • very short dosing times > 250ms
  • high resolution (e.g. DN10: 2000 pulses/l)
  • large selection of filling quantities with different nominal sizes
  • can be combined with the batch controller
Technical Data
Nominal sizeDN10,DN15,DN25
Process connectionTriClamp according to DIN 32676
Material

Housing: stainless steel

Oval wheels: stainless steel, PEEK

Seals: EPDM, alternatively Viton

Flow Range

0.2 l/min to 5 l/min  –  2,000 Pulses/

(0.05 gal/min to 1.32 gal/min)l

1 l/min to 30 l/min  –  1,000 Pulses/l

(0.26 gal/min to 7.93 gal/min)

2 l/min to 50 l/min – 400 Pulses/l

(0.53 gal/min to 13.21 gal/min)

4 l/min to 100 l/min – 200 Pulses/l

Accuracy±0,25% to ±0,5%
Repeatability±0,1%
Viscosity0,3 to 1.500 mPa·s
Process temperature

Liquid temperature: -10°C to +130°C (-14°F to 266°F)

ambient temperature: -20°C to +70°C (-4°F to 158°F)

Process pressuremax. 16 bar
Ex-protection
not available
  • Chemistry and pharmaceutical
  • Food and beverage