Maintenance4325−1/A1
Winterthur Gas & Diesel Ltd.
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7) Operate the handwheel to move the shut-off valve to the position AUTOMAT..
8) Make sure that no air flows from the bore of the screw plug (5, Fig. 3). When no
air flows, the automatic function of the shut-off valves operates correctly.
6.3 Automatic Mode
1) Make sure that the shut-off valve is in the position AUTOMAT..
Note: When you do the step below, air will flow through the pipe. This activates
the control valve (1), which shows that the valve body and valve operate.
2) Open the test valve 2.06 to activate the control valve (1). The shut-off valve
operates automatically.
3) Make sure that air flows from the bore of the screw plug (5).
4) Close the test valve 2.06.
5) Make sure that no air flows from the bore of the screw plug (5).
6) Operate slowly the handwheel to move the shut-off valve to the position
OPENED. Make sure that you can feel the spindle (8) touch the spindle guide (9).
7) Turn back the handwheel sufficiently to get a clearance of between 2.0 mm and
5.0 mm. One third of a turn of the spindle is equal to 2.0 mm.
Note: If there is no clearance after frequent servicing of the valve seat and
valve, replace these items during the next overhaul.
7. Completion
1) Use the handwheel to move the shut-off valve to the position CLOSED.
2) Install the screw plug (5).
2016
Starting Air Shut-off Valve: Clean and Function Check
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