Page 175 - Parker - Process filtration

Glossary of Filtration Terminology APPENDIX

(Glossary continued)

Single Open End (SOE): Turbidimetric Effi ciency:
A fi lter cartridge confi guration such that one end is Percentage reduction of haze or cloudiness in a fl uid.
sealed off by a closed end cap and the opposite end
has a 222 O-ring, 226 O-ring or other seal device. Turbulent Flow:
Used in housings that are designed to accept 222 Flow rate at which laminar fl ow (10 ft/sec) is
O-ring, 226 O-ring or other SOE cartridges. exceeded and fi ltration performance is adversely
affected.
Single Pass Process:
A process in which a fl uid passes through the fi lter Uniform Density:
medium only once before further processing. Parker Having the same weight per unit volume of
Process Filtration products are tested and rated for fi lter media from the upstream (infl uent) to the
these types of processes. downstream (effl uent) side of the fi lter.

Specifi c Gravity: Unloading:
Ratio of mass of a solid or liquid to the mass of an Tendency for previously collected contaminant to
equal volume of distilled water, or of a gas to an be forced through the fi lter medium as pressure is
equal volume of air under prescribed temperature increased.
and pressure.
Vessel:
Surface Media: Container for fi lter cartridges or bags.
Filter media that are thin, cellulosic, microfi ber or
membrane material and, due to their construction, Viscosity:
generally provide high fl ow rate, low pressure drop, A measure of the resistance to fl ow of a liquid.
high effi ciency, high surface area and high dirt- Viscosity of a liquid varies appreciably with changes
holding capacity. in temperature. Typically expressed in centipoise,
centistoke or SSU values.
Suspended Solids:
Mixture of solids suspended in a fl uid. Expressed in Water Hammer:
weight or volume. Pressure surge produced when the linear fl ow of a
noncompressible fl uid is rapidly interrupted by
Thixotropic Flow: devices such as fast-acting valves.
A fl uid system where a range of viscosities can be
measured at any given shear rate. The longer the
material is sheared, the lower the viscosity until a
lower limiting value is reached.

Throughput:
Total volume of a fl uid that passes through a fi lter
before it must be replaced.

Turbidity:
Measure of the amount of haze or cloudiness caused
by fi ne particles in a fl uid.

Specifi cations are subject to change without notifi cation.
For User Responsibility Statement, see www.parker.com/safety

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