D-Series Syringe Pumps - Isco

D Series Syringe Pumps: Models 65DM, 100DM, 100DX, 260D
Section 2A 65DM, 100DM, 100DX, and 260D Liquid System Connections & Accessories
Two back pressure regulators are available from Teledyne Isco: a
7 bar (P/N 209-9012-22) or a 5 bar back pressure regulator (P/N
209-9012-21). Both regulators reduce flow noise and improve
pump performance at pressures less than 3.5 bar. Fittings to
connect the tubing to the regulators are supplied.
To install the back pressure
regulator
1. Note the arrow on the regulator indicating the fluid
direction.
2. Connect your tubing (not supplied) between the pump outlet
and the regulator using the supplied fittings, see Figure
2A-10.
Figure 2A-10 Back pressure regulator
2A.5 Nitrogen Purge A thin film of liquid will wet the inside of the cylinder each time
the piston travels up the cylinder. Corrosive liquids drying in the
air can cause the cylinder to corrode. This corrosion occurs at
varying rates based on the liquids and pumping conditions being
employed. The lowest flow rate engenders the most corrosive
pumping environment, as the deposited film has the longest time
to corrode the inside of the cylinder wall.
The 100D or 260D pump is equipped with a purge connector
(Figure 2A-11). The purge connector enables the pump cylinder
beneath the piston to be purged with nitrogen which inhibits cylinder
corrosion and may increase the useful cylinder life. Figure
2A-11 shows a typical purge connection to the purge tube on the
back of the pump.
2A-14