Pumps for industry (UK)(PDF : 2826.9 KB) - Watson-Marlow

litre/hour, with pressures to 2 bar (30 psi)720 performance graphFlow rate (litre/hour)Flow rate (litre/min)Drive speed (rpm)720 pumpheads: flow ranges, litre/hr701R (continuous tubing)720RE (LoadSure elements)Tube orelementbore(mm, in, #)9.63/819312.71/28815.95/8189193/419125.419212.71/28815.91/2189191/219125.41920.1-360 rpm 0.12-4200.22-7800.30-11000.42-15000.56-20000.22-7800.30-11000.42-15000.56-2000An optional second pumphead doubles pumpflow or provides two separate flows.Flow rate varies with tube material, discharge pressure, suction and viscosityConstruction materials: All 720 pumpheads are designed for strength and durability. Pumphead track: aluminium; drive shaft: stainlesssteel 440C; rotor end plates: aluminium; cradle assembly, track: aluminium; central shaft: EN24 steel; rollers: MOS2 filled Nylon 6(Nylatron); springs, spindles: stainless steel; coating: Alocrom pre-treatment with polyester powder coating.NOW SELECTYOUR DRIVEAbrasive slurryWith 50% solids, the oxide-water mix that a major roof tilemanufacturer uses to colour his products is highly abrasive.He tried piston pumps, but abandoned them when he found that the slurrywas effectively being de-watered: the pumps pumped the water, but leftthe solids to clog the cylinders. He tried centrifugal pumps, but poor flowcontrol led to inconsistent colouring.Then he bought a Watson-Marlow 720 series pump. The slurry remaineduniform and could be applied in precise quantities. Since the fluid iscontained within the tube, the pump cannot clog. in addition, the pump issmall enough to be conveniently set up in various parts of the factory, andits impervious casing protects the pump in a very messy environment.13