Watson-Marlow 505Dz - Manual (Page 14)

14
Part 3: 501RL Pumphead
Description
The 501RL pumphead has two spring-loaded working rollers, which
automatically compensate for minor variations in tubing wall thickness, giving
extended tube life.
The 501RL is set during manufacture to accept tubing with wall thicknesses of
between 1.6mm and 2.0mm, and internal diameters of up to 8.0mm. The 501RL
pumphead is equipped with a "tool lockable" guard for increased safety. This
should be locked shut whilst the pump is in use.
A major feature of the 501RL pumphead is the ability to run the pumphead
clockwise for extended tube life, or anti-clockwise to operate against higher
pressures.
The tube clamps of the 501RL are adjustable to four positions to allow varying
tube diameters to be securely held without occluding the tube.
Installation
Any one of three tubing input/output positions can be selected on cased drives.
Select the required position then fit the track over the drive shaft and locating
boss. Tighten the track retaining screw.
After checking that the shaft is clean and degreased slide the rotor on to it.
Rotate the rotor until its guide rollers are alligned flush to the front edge of the
track. The rotor is attached to the shaft by a split collet, and it is important that
the rotor retaining screw is fully tightened to a torque of 3Nm using the largest
screw driver that will fit the screw head. This will prevent the collet slipping when
the pump is being used.
To reposition the track, remove any tubing from the pumphead, and swing out
the crank handle to expose the rotor retaining screw. Turn the screw
anticlockwise one turn to release the collet, and withdraw the rotor from the shaft.
Loosen the track locating screw, and pull the track clear. Rotate the track to its
new position and tighten the track locating screw.