18 PB0379:m-505atex-en-04
10 Operating parameters
The following tube materials can be used with the 505LA pumpheads in double “Y” or continuous tubing
configurations (two separate channels). Bore sizes range from 0.5mm to 9.6mm, with 2.4mm wall
thickness. Only Watson-Marlow tubing should be used to guarantee continued compliance with the
ATEX directive.
Tubing: working temperature range
Marprene 5C to 80C (41F to 176F)
Bioprene 5C to 80C (41F to 176F)
Pumpsil -20C to 80C (-4F to 176F)
PureWeld XL -20C to 80C (-4F to 176F)
GORE® STA-PURE® Pump Tubing – Series PCS -20C to 80C (-4F to 176F)
GORE® STA-PURE® Pump Tubing – Series PFL -20C to 80C (-4F to 176F)
Neoprene 0C to 80C (32F to 176F)
The following parameters define the boundary of the safe working envelope - these values must not be
exceeded (ATEXcompliance will be invalidated):
505LA ATEX pumpheads (all model variants)
Ambient temperature range 5C to 40C (41F to 104F)
Maximum allowable fluid temperature 65C (149F)
Max peak pressure (0.5 to 9.6 mm bore) 2 bar (29 psi)
Max continuousspeed 350 rpm
Corrosion resistance section 16 "Materials of construction" on page32
Tube life section 11 "Tube life" on the facing page
Please note that, although GORE® STA-PURE® Pump Tubing is rated at 4 bar in a standard 505LG
pumphead, the ATEXversion (505LGA) is limited to 2 bar.
WARNING! Do not run dry for excessive periods. Roller and tubing
temperatures can exceed normal operating range.
Tube life will be reduced increasing the chance of premature failure.
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