BAKER HUGHES - Drilling Fluids Reference Manual

FLUIDS ENVIRONMENTAL SERVICES
Absolute Rated Pleated Filter Elements
A beta 5000 absolute rated range of highly efficient,
cost effective pleated process filters. Elements are
manufactured in accordance with ISO 9002 using the
highest quality materials where applicable.
Absolute cartridges are available in a wide range of
micron ratings extending from 2 microns to 100
microns as measured by the industry standard OSU F2
particle challenge test, using fine/coarse A.C. test dust.
Higher temperatures and differential pressures can be
accommodated using stainless steel cores and end
caps.
Technical Specifications
Filter media
Core material
Dimensions (approx)
Seal material
End details
Single closed end, single open end type 222 fitting.
Micron ratings 2, 5, 10, 20, 50 & 100 (absolute)
Recommended Operating Conditions
Maximum temperature
Maximum flow rate
Absolute Rated Pleated Filter Elements
65ºC @ 20psid.
The diameter of the largest, hard, non-deformed particle which will pass through a filter medium
under specific test conditions, verified using automatic particle counters upstream and downstream of
the filter under test. Absolute filters are utilized in critical applications where guarantee of filtrate
quality is required at all times throughout the life of the filter. They have a higher unit cost than their
nominal counterparts. Absolute rated filters are often used in combination with nominal rated filters
to optimize economics and filtration efficiency e.g. absolute rated cartridge filters downstream of a
diatomaceous earth filter press.
Nominal Rated Wound Filter Elements
Glass fiber/Polyester
Polypropylene
Diameter 63mm, length 1000mm
Buna O-Ring
Maximum change out differential pressure 4 bar
4m 3 /hour per 1000mm element.
A less defined rating, which is usually expressed as a percentage removal efficiency at a given
particle size (90%) removal of particles of 5 microns and above, nominal rated filters are generally
used as “bulk” solids removal filters or as cost effective pre-filtration to absolute filters. Nominal
rated filters are normally not given a true removal rate as their efficiency will vary through the life of
the filter cycle, e.g. the efficiency will increase if a uniform cake of debris is built up on the upstream
BAKER HUGHES DRILLING FLUIDS
REFERENCE MANUAL
REVISION 2006 14-61