1
Introduction
Hardware Components
6
Accela 600 and 1250 Pump Hardware Manual
Thermo Scientific
Seal Wash Pump
You can also add an optional seal wash pump to the 600 and 1250 pumps for continuous
flushing of the piston guide bushings. Use the seal wash pump for optimal pump performance
when working with highly concentrated buffer solutions.
As the pistons move back and forth within the displacement chambers, a small quantity of
mobile phase leaks behind the primary piston seals. With buffered mobile phases, a precipitate
(also known as creep or salt build-up) forms as the liquid fraction evaporates. The abrasion
caused by this precipitate can scratch the piston and shorten the life of the piston seals. With
the seal wash pump option, a large reservoir above the pump continuously feeds the pump
and flushes the piston guide bushings to prevent the precipitation of salt crystals behind the
primary piston seals.
For information about installing the seal wash pump, see
Leak Sensor
In addition to the dynamic mixer and the seal wash pump, you can add an optional leak
sensor that detects the presence of liquid on the pump’s drip tray.
For information about installing the leak sensor, see
Tip
For best results, do not use solvents buffered with nonvolatile salts in an LC/MS
system.
