Oval Gear Flowmeter

Oval gear meters measure flow by employing a geared rotor to pass known volumes of a fluid through a housing. The oval gear flow meter comprises oval-shaped, geared rotors which rotate within a housing of specified geometry. Capillary action of the metered fluid forms a liquid seal.

The oval gear flow meter comprises oval-shaped, geared rotors which rotate within a housing of specified geometry. Fluid differential pressure causes the inter-meshing gears to rotate, trapping a ‘pocket’ of fluid between the gear and the outer housing and subsequently emptying the fluid pocket into the downstream flow. Capillary action of the metered fluid forms a liquid seal. Each ‘pocket’ holds a precise and known volume of fluid so counting the pocket frequency gives a measurement of the volumetric flow rate. This is typically achieved by embedding magnets in the rotors, which then actuate a reed switch or provide a pulse output as they rotate.

Features:

  • High accuracy: ±0.5% RD (Option: ±0.2% RD)
  • Metering chamber is of a pocketless configuration and is applicable to a wide range of liquids including chemical liquids.
  • Low pressure loss, high durability

 

Specifications

Major Specifications

Model : Standard High temp. or Low temp.
Nominal size : 10 to 50mm, 20 to 50mm
Connection : JIS 10, 16, 20, 30K flange, ASME/JPI 150, 300 flange
Flow range : * 0.2L/h to 44m3/h (9types) 0.05 to 44m3/h (6types) 0.03 to 44m3/h (6types)
Operating temp. range :  –10 to +120°C 120 to 260°C –60 to +60°C
Max. operating pressure : 2.94MPa (depends on connection standard.)
Accuracy Within : ±0.5% or ±0.2% of reading
Power supply : DC-powered or battery-powered
Body material : SCS14
Output : Analog, pulse
Configuration : Explosion proof or non-explosion proof, IP66
Applicable fluids : Water, gasoline, light oil, heavy oil, etc.

General specifications for nominal size 80 mm and bigger
Nominal size : 80 to 350mm
Flow range * : 4 to 1000m3/h (8types)
Accuracy Within : ±0.5% or ±0.2% of reading

* 5 to 1000 mPa•s in viscosity

Applications

Oval Gear Flowmeters provide precise volumetric flow measurement of clean liquids found in a broad range of industries including automotive, aviation, mining, power, chemical, pharmaceutical, food, paint & petroleum. Applications include the distribution of fuels, fuel oils, lubricants, alcohols, solvents, blending of bio & ethanol fuels, metering of chemicals, grease, adhesives, ink, insecticides & non-conductive liquids either pumped or gravity fed.