Pb0347:M-620Atex-En; General Operation - Watson Marlow Pumps 620RA Serie Manual Del Usuario

13

General operation

There are moving parts inside the pumphead. Before opening the
pumphead guard, ensure that the following safety directions are
followed:
1.
2.
3.
4.
5.
Opening the pumphead guard
Unlock the pumphead guard by turning the guard fastener ¼ turn anticlockwise with a 5mm Allen
l
key or screw driver suitable for the hazardous area.
Open the guard to its full extent. This creates the maximum clearance between the tube ports and
l
guard to remove the tubing.
Engaging/disengaging the rollers
The extent of travel of the roller release levers is indicated below. Do not try and force the levers
l
beyond their normal extent of travel as this will damage the rotor.
To engage the rollers snap the roller release levers counter clockwise making sure that the rollers
l
locked out against the tubing. To disengage the rollers, rotate the release levers clockwise to their
disengaged position. For high pressure tubing elements or four roller pumpheads, the 5mm Allen
key can be used to aid leverage when engaging/disengaging the rollers with the release levers.
Make sure that fingers are clear of the front face of the rotor hub when
using the roller release levers.
25
Ensure that any motor drive connected to the pumphead is
isolated from any electrical or compressed air supply.
Ensure that there is no pressure in the pipeline
If a tube failure has occurred, ensure that any fluid in the
pumphead has been allowed to drain to a suitable vessel,
container or drain
Ensure the pumphead is isolated from the fluid supply
Ensure that appropriate Personal Protective Equipment (PPE) is
worn

PB0347:m-620atex-en-03