multi N/C pharma HT
Function and design
19
Connection method
Inside the device, most gas connections have been implemented via FAST connectors
(FAST – Fast, Safe, Tight). These connectors provide a tight transition between the
hoses and connections with different diameters. The soft sleeves prevent the risk of
glass breakage in comparison to rigid screw connections. There are different connector
versions.
Figure 8 FAST connector
So-called Fingertight screw connections are also used. These flangeless fittings consist
of a conical nipple and a banjo bolt. These hose connections seal purely by tightening
the plastic banjo bolt finger-tight.
1
2
3
Figure 9 Fingertight screw connection
1 Hose
2 Banjo bolt
3 Conical nipple
3.1.3
Combustion system
The combustion system is behind the left side wall of the analyzer.
The combustion furnace is a resistor-heated vertical furnace for digestion temperatures
of up to 950 °C.
A combined combustion furnace for vertical and horizontal operation can optionally be
installed for operation with the Swab Test module for the analysis of solid samples.
The combustion tube (reactor) consists of quartz glass. It is filled with catalyst and auxil-
iary material. If the effectiveness of the catalyst decreases, the combustion tube must be
filled again.
The furnace head is fitted to the top opening of the combustion tube. At the bottom
end, the combustion tube is connected to the condensation coil via a fork clamp.
