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1 M&C | TechGroup Germany GmbH
Rehhecke 79, D-40885 Ratingen
info@mc-techgroup.com
www.mc-techgroup.com
Fon +49 (0)2102 935-0
Fax +49 (0)2102 935-111
2-1.3.6 10.04/06.06
Application
The M&C sample probes version SP3000 are
used for continuous extraction
of explosive
gases (Ex-zone 20, 21 and 22) from dust
loaden, high temperature and/or humid
processes. The probes can be mounted in
Ex-zone 1, 2, 21 and 22.
Description
The sample probes are designed for easy
installation, reliable operation and trouble-
free maintenance. They are versatile
in application and depending on the task
to be performed, various pre-filters series
V12/V20 with integrated volume displacer
and optional with extension tubes (see page
4 and data sheet 2-1.1.0.8), not included in
the scale of delivery, can be simply screwed
into the mounting flange of the basic probe.
These process-internal M&C pre-filters are
necessary for a valid Ex-approval of the
M&C-probes type SP3000. For error control
of the pre-filter the sample gas flow rate has
to be monitored externally.
The probe-internal M&C stainless steel filter
element with a large surface and high
capacity is located in the external housing.
The design offers little or no stagnant space
outside the process. The probe housing is
covered with a protection shield which is
part of the Ex-approval.
The probes are designed in such a way that
changing the filter element is possible without
the use of tools. In this operation, neither
the sample probe tube nor the sample
line need to be removed, thus avoiding
contamination of the clean gas path and
maintaining the integrity
of the system.
The special design of the optional heating
of the M&C-probes version SP3000 permits
controlled heating of the complete filter
housing, including the mounting flange.
This ensures reliable operation external
to
the process preventing the temperature
falling
below the dew-point.
Gas Sample Probe Series SP®
Version SP3000 for sampling from zones with explosive dust
Special Features
Approval according to ATEX for
sampling from Ex-zone 20, 21 and 22
Approval according to ATEX for
mounting in Ex-zone 1, 2, 21 and 22
Optimum operational reliability
Universal applicability
Adaption to nearly all process
conditions due to its compact and
modular design
Easy mounting and maintanance
Small volume, fast response time
Patented construction
The temperature of the M&C-probes version
SP3000 is controlled by a self-regulated heater
version HEX4-135 or HEX4-180 (see data
sheet 2-3.2) for Ex-zone 1 and 21, temperature
class T4 resp. T3 and for gas sampling
from zone 0, 1 or 2. In dependence of the
ambient temperature and the heater version,
the min. temperature in the probe is
90°C resp. 120°C, the max. temperature is
120°C resp. 160°C.
For back-purging the M&C pre-filter, the
option RS is available with mounted buffer
vessel triggered by an explosion-proof
solenoid valve. With the mounted option for
back-purging type RS, gas can be sampled
from zone 20, 21 and 22. The back-purge
pressure has to be monitored externally
and has to be min. 1 bar higher than the
process pressure. For the pressure control
while back-purging a special patented valve
is mounted in the sample gas outlet. Thus
an additional solenoid valve to shut off the
sample gas outlet is not necessary. The back
purge inlet is shut off by a check valve.
When sampling from Ex-zones, back purging
is only allowed with a gas suitable
for the sampling point.
SP3000RS/HEX4-135 bzw. 180
