LPLT Filter Press Instruction Manual
207128
Revision G, September 2012
6
1
Introduction
Fann’s Series 300 LPLT Filter Press is used for measuring filtration and wall-
building properties of drilling fluids and cement slurries. The filtration rate is the
fluid loss measured in milliliters at ambient temperature and 100 psi (690 kPa)
through a special filter paper for 30 minutes. Wall-building characteristics are
demonstrated by the thickness and consistency of the filter cake (the residue)
deposited on the filter paper after 30 minutes. The filter cake is measured to the
closest 1/32 in. or the nearest millimeter.
The low pressure filter press assemblies described in this manual consist of the
following items:
filter cell mounted in a frame
pressure assembly and regulator
filter paper, the filtering medium
25 ml graduated cylinder, the filtrate receiver
The filter press cell body, top cap, and base cap are constructed of 303 stainless
steel.
The filtering medium is filter paper that has been especially hardened for filtrate
testing.
Pressure sources deliver the required pressure, 100 ± 5 psi (690 ± 35 kPa) and can
be any of the following:
compressed nitrogen or air in cylinders,
carbon dioxide gas cartridges,
high pressure air or water systems,
dead-weight hydraulic pressure assembly
Compressed oxygen should not be used as a pressure source.
Fire and explosion hazards exist when using oxygen.
