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.

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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