Unigas R91 VS Series, Руководство по установке, использованию и обслуживанию, Страница: 17 / 60

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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