SP2000/V200 pages

Embracing Challenge

Prefilters for Gas Sample Probes
Series SP®
Version SP2000/V20.. with G 3/4”-connection,
SP2000/V12 with flange connection,
Version SP2000/20SS 150 with tube connection
Prefilters for series SP®

Special Features
For dust loading up to 2g/m3

P
oint selective sampling

Application
The M&C-prefilters are used together
with M&C gas sample probes series SP®
for continuous gas sampling in processes
with increased dust loading.

Depending on fabrication, the prefilters /V20..,
/V12.. are partially made of different material
combinations. See table. For reduction of the
delay time in case of a small sample gas flow,
prefilters with volume displacer have to be
used.

Description

The M&C tube prefilter /V20-T of PTFE cloth
with interweaved metal filaments for reduction of the surface resistance (in order to
avoid frictional electricity) disposes over an
excellent back purging quality. It is used for
example in case of gas ­ ampling out of coal
s
bunkers with a high content of superfine
dust.

Sampling after wet scrubber up to 90 °C
Sampling temperature up to max.

1800°C

Different lengths
Great variety of materials
Easy mounting

The large active surface of the M&C prefilter
guaranties a long moulding time. Even in case
the flow rate of the sample gas is increased,
there is only a small ­ ifference pressure on the
d
filter matrix between clean gas and crude gas
side. Therefore, the solid particles do not get
into the filter’s pore structure. They are deposited as filter cake on the filter’s surface and
cause a prolonged moulding time in its property as prefilter. The M&C-prefilters SP2000 /
V20.. /V12.. /20SS are selected according to
the specific application. The basis for selection are the ­ rocess parameters, i.e. the gas
p
compounds, dust loading, grain sizes, water
v
­ apure saturation, temperature, pressure and
gas velocity.
The M&C prefilters /V20.. are equipped
with a welded thread connector for
m
­ ountage into the mounting flange of
the M&C gas sample probe. For an optimal sampling position in the process, the
prefilters /V20.. can be mounted to the
sample probe via an extension tube /Vm...
In case of a high velocity of the process gas,
shape protection plates /AB.. are used in
order to protect the prefilters /V20.. against
abrasion.

The prefilter /20SS 150 is used for direct
mounting on the M&C sample tubes SP2000/
SS. It is supplied with a shape protection plate
and a tube fitting with double cutting ring.
If there are problems eg. in case the depth
for assembling is too small or the flow velocity is too high, or the dust content or the
temperature are too high, then the electrical
heated adapter tube /AR should be used. It is
equipped with a flange connection at both
sides and is to be mounted on the plant’s
connection flange.

The prefilters /V12-... have got a mounting flange adapter of stainless steel,
e
­ xecuted with 4 threaded bolts for
easy mounting. The prefilter versions
/V12-.. /SS, /V12-.. /IC are equipped with
a welded protection tube of stainless
steel or Incoloy on the mounting flange
adaptor. The feeding of process gas is made
via the three longitudinal slots distributed on
180° tube periphery. The special double-ply
construction of the prefilter /V12-1, /V12-3
is granting a particularly high back purging
efficiency.

Technical specifications and illustrations are without
obligation, subject to modifications. 09.96/03.09

M&C TechGroup Germany GmbH • Rehhecke 79 • 40885 Ratingen • Germany
info@mc-techgroup.com • www.mc-techgroup.com • Fon +49 2102 935-0 • Fax +49 2102 935-111

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