17
Siemens VGD20.. and VGD40.. gas valves - with SKP2.. (pressure governor)
Mounting
When mounting the VGD.. double gas valve, two flanges are required (as for VGD20.. model, the flanges are threaded);
to prevent cuttings from falling inside the valve, first fit the flanges to the piping and then clean the associated parts;
install the valve;
the direction of gas flow must be in accordance with the direction of the arrow on the valve body;
ensure that the bolts on the flanges are properly tightened;
ensure that the connections with all components are tight;
make certain that the O-rings and gaskets between the flanges and the double gas valve are fitted.
Connect the reference gas pipe (
TP
in figure; 8mm-external size pipe supplied loose), to the gas pressure nipples placed on the
gas pipe, downstream the gas valves: gas pressure must be measured at a distance that must be at least 5 times the pipe size.
Leave the blowhole free (
SA
in figure). Should the spring fitted not permit satisfactory regulation, ask one of our service centres for a
suitable replacement.
Caution: the SKP2 diaphragm D must be vertical (see Fig. 5).
WARNING: removing the four screws BS causes the device to be unserviceable!
Fig. 3
Fig. 4
Fig. 5
SIEMENS VGD..MOUNTING
POSITIONS
Fig. 6
Fig. 7
TTENZIONE
TTENZIONE
BS
BS
SKP1.
SKP2.
BS
BS
SA
TP
D
7631z05/0101
TP
Summary of Contents for R91 VS Series
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Page 42: ...Annex1 Example for motor cable...
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Page 44: ...Annex 2 Example for sensor cable...
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