Do
clean any process fluid from the drive in order to maintain normal operation of the leak
detect system.
Do
check that replacing a pumphead clears a leak detect alert.
Do
change the pumphead shortly after failure, this ensures fluid containment is retained.
Do
isolate the pump (from pressure) when filling chemical storage tanks
Do
check the drive shaft for visible signs of any chemical when replacing an expired
pumphead for a new pumphead. If chemical residue is found report this to your local
Watson-Marlow representative. Carefully read safety notes and instructions in "Pumphead
Replacement (qdos 30)" on page 131 and "Pumphead Replacement (qdos 20, 60, 120 and
CWT)" on page 139.
Do not
build a pump into a tight location without adequate airflow around the pump.
Do not
pump any chemical not compatible with the pumphead.
Do not
tilt the drive with a pumphead fitted, even if it is not running.
Do not
allow process fluid to leak onto the drive during pumphead replacement.
Do not
use the ignore function as a long term solution to a failed pumphead, prolonged
exposure to process fluid may result in the loss of fluid containment resulting in drive or
process area contamination. The only approved use of the Ignore function: In order to de-
pressurise and drain down the system and to allow for the safe disposal of the pumphead,
the ignore function can be used to operate the pump prior to changing the pumphead—Only
applicable for pumps manufactured up until October 2019.
Do not
strap the control and mains cable together.
qdos20 and 60 only:
Do
select the correct tube type when asked.
Do
replace the pumphead when recommended to do so by the pumphead management
system.
Do
Select 'pumphead selection' and 'PU pumphead' within the control panel setting if
changing pumphead prior to pumphead failure.
Do not
reinstall the used pumphead once the pumphead management system recommends
the pumphead to be replaced.
10.3
Pressure capability
•
qdos120 can be operated continuously at discharge pressures of up to 4 bar (60 psi).
•
qdos60 can be operated continuously at discharge pressures of up to 7 bar (100 psi).
•
qdos30 can be operated continuously at discharge pressures of up to 7 bar (100 psi).
qdos30 can be operated at discharge pressures of up to 10 bar (145 psi), however
flow rate and pumphead life will be affected.
•
qdos20 can be operated continuously at discharge pressures of up to 7 bar (100 psi).
qdos20 PU can be operated continuously at discharge pressures of up to 4 bar (60
psi).
•
qdos CWT can be operated continuously at discharge pressures of up to 7 bar (100
psi).
•
For all pump variants inlet pressure should not exceed 2 bar. Higher in-let pressure
results in higher flow rates due to the pressure aiding the tube restitution.
m-qdos-allmodels-en-07
33
