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Sealing principle of the Compac flange
P
Dummy plugs
3.4
included as standard
The dummy plug is made of stainless steel and has a bright red plastic
protective cap to stop it unintentionally loosening.
It secures the measuring point interface while the sensor is uninstalled,
e.g. when changing the sensor for recalibration. For this purpose, it is
screwed onto the sealing cone (Fig. 1) when the line is
depressurized.
The dummy plug seals both metal-wise and redundantly via an O-ring.
A significant advantage over simple dummy plugs is that the trapped
compressed air can escape safely under pressure during
(unintentional) disassembly. When turning the union nut, enough
thread turns remain to prevent it "shooting off". If the sensor is
installed, the dummy plug is stored near the device in one of the
holders (tapped bore) – as shown in Figure 2.
1
2
13
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