Smooth, Quiet Pumping of Viscous Fluids

The proven GA, GR and Gearex herringbone gear pump lines (formerly Flowserve) are now part of the IMO range from CIRCOR. Their double-helical, V-shaped gears balance axial forces, giving smooth, near pulse-free flow with low noise and vibration, less bearing and shaft wear, and a low total cost of ownership. Stainless steel construction and intermittent dry-running capability are available for demanding duties.

GA Series – compact workhorse for viscous liquids

  • Flows to 27 m³/h (120 gpm), pressures to 17 bar (250 psi)
  • Temperatures to 175°C (350°F), viscosities to 50,000 SSU

GR Series – simple external design with two moving parts and a single shaft seal

  • Flows to 275 m³/h (1,200 gpm), pressures to 35 bar (500 psi)
  • Temperatures to 350°C (650°F), viscosities to 1 million SSU
  • Standard sizes 40 to 200 mm (1.5 to 8 in)

Gearex Series – rugged, compact, generally compliant with API 676 (2nd edition), with timing gears driving the rotors

  • Flows to 180 m³/h (800 gpm), pressures to 20 bar (300 psi)
  • Temperatures from -50°C to 450°C (-60°F to 850°F)

All series run at speeds to 1,800 rpm.

Suited for: lube and hydraulic oil circulation, process industries, OEM equipment, filtration equipment, fire foam systems, petrochemical blending and transfer, and food and beverage.