Watson-Marlow 700 series - Manual (Page 3)

ATEX Directive: Watson-Marlow 700 series pumpheads User Manual 3
4 Operating parameters
The following tube materials can be used with 701RA pumpheads. Bore sizes range
from 9.6mm to 25.4mm, with a wall thickness of 4.8mm.
Tubing: working temperature range
Marprene
5C to 80C
Bioprene 5C to 80C
Pumpsil platinum-cured silicone -20C to 80C
STA-PURE PCS
0C to 80C
STA-PURE PFL 0C to 80C
Neoprene 0C to 80C
PVC 0C to 80C
The following parameters define the boundary of the safe working envelope - these
values must not be exceeded (ATEX compliance will be invalidated).
When two or more items of ATEX equipment are combined, the permissible operat-
ing envelope will be determined by the narrowest range after considering all values
for a given parameter.
701RA pumpheads
Ambient temperature range
5C to 40C
Max peak pressure (701RA, 701RXA,
7014REA and 701REXA)
2 bar
Max peak pressure (701RGA) 4 bar
Max continuous speed 360 rpm
Corrosion resistance See 10 Materials
Tube life See 7 Tube life
WARNING! Do not run dry for excessive periods. Roller and tubing
temperatures can exceed normal operating range.
WARNING! Do not run pumphead against a closed or restricted dis-
charge pipe. This can lead to excessive roller and tubing temperatures
and pressures in excess of the limits in the table above. Excessive
pressure may cause tube failure.