These steps apply only when installing a shut-off valve during initial setup of the pump. To install a shut-off valve after initial operation of the pump, follow the steps in Installing Solvent Shut-Off Valves.

When

To shut off the solvent flow through the system at the solvent reservoir, for example, to prevent solvent from flowing through the system when you open a flow connection on the low-pressure side

Parts and additional items required

  • Shut-off valve, kit containing one shut-off valve and fitting connections

  • Tubing cutter

Preparations

Prepare the pump and follow the steps in Connecting the Solvent Lines.

Follow these steps

Installing a shut-off valve in the solvent line
Figure: Installing a shut-off valve in the solvent line

No.

Description

1

Solvent line

2

Fitting

3

Ferrule

4

Shut-off valve

  1. Cut the solvent line about 10 cm from the reservoir cap with a tubing cutter. Make sure that the cut is at a right angle to the length of the line.

  2. Onto the free end of each solvent line, slide a fitting and a ferrule. Mind the correct orientation of the fitting and ferrule (see picture).

  3. Tighten the solvent lines to the shut-off valve.

Solvent line with shut-off valve installed
Figure: Solvent line with shut-off valve installed

No.

Description

1

Shut-off valve

2

Retaining guide

  1. Check the solvent lines across the entire flow path. Make sure that the lines are not bent, pinched, or squeezed at any point in the flow path.