Watson-Marlow 701RA, User Manual

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17 Materials of construction
Description Material Finish
Gear - wheel, helical Mild steel EN1A Zinc plated
Shaft - drive High tensile steel EN24 Nickel plated
Plate - front Aluminium alloy LM24 Painted
Plate - back Aluminium alloy LM24 Painted
Track Aluminium alloy LM24 Painted
Rotor - flange Aluminium alloy LM24 Painted
Cradle Aluminium alloy LM24 Painted
Tube clamp Aluminium 6063 -
End cap - cradle, lh Aluminium 6063 Painted
End cap - cradle, rh Aluminium 6063 Painted
Knob Aluminium 2011 -
Springs Stainless steel 301S21 -
Screws / studs Stainless steel 301S21 -
Roller shafts Stainless steel 301S21 -
Rollers Polyamide and MoS2 -
Lock - tube clamp Polyamide and glass -
Bearing - ball Steel, 1% carbon, 1.5% chromium -
Earth lead - ATEX Copper Tin coating
The above materials have been carefully selected and have a well proven track record. However, if there
are any aggressive chemicals present then it is imperative that a risk assessment is conducted. This must
not be limited to just the pumped fluid but should also include any other aggressive fluids in the
intended operating environment.
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