#Product Trends
POLY - Discharge Gear Pump
Offered with either a round inlet port, by means of which the suction flange of the pump is directly connected to the outlet flange of the reactor or as a low NPSH version, where the pump is connected between the pump and reactor flanges, in order to achieve an even larger and shorter inlet port.
Housing
Non-alloyed and alloyed steels · cast steel · with optional surface coating
Gears
Nitrated steel · tool steel · special steel · with optional surface coating · helical gearing · herringbone gearing
Friction Bearings
Tool steel · NiAg (nickel-silver) · Al-bronze · special materials · with optional surface coating
Shaft Seals
(Vacuum) viscoseal · stuffing box · combination of viscoseal and stuffing box · double-action, buffered mechanical seal
Heating Systems
Heat transfer oil · steam
Operating Parameters
Viscosity
up to 40000 Pas
Temperature
up to 350°C (662°F)
Inlet pressure
Vacuum to max. 40 bar (580 psig)
Differential Pressure
Up to 250 bar (3225 psig)
The values listed are maximum values and must not coincide under certain circumstances.
Pump Sizes
From 22/22 (4.7 cm3/U - 10 kg/h) up to 280/280 (12,000 cm3/U - 30,000 kg/h). Intermediate sizes, with wider gear wheels for lower differential pressure, are available as standard, e.g. 152/254 (3,170 cm3/U).