DRESSER RB 4700 Manuel D'instructions page 29

SSV 8600 (for RB 4700 models with integrated SSV 8600)
Shut-off valve with lever reset (SSV 8600)
This device consists of a valve body 1, a pressure switch
used to compare the pressure 2, a control lever 3 and
a stem-valve plug assembly 4. The shut-off valve is
triggered when the pressure value to be checked in the
control chamber 5 increases or decreases beyond the
established values, moving from its balancing position
Item
Description
1 Valve body
2 Pressure switch
3 Levers system
4 Stem-valve plug assembly
5 Motorisation chamber
6 Diaphragm assembly
7 Valve plug spring
8 Valve orifice
9 Screwing ring
10 Screwing ring
1 1 Resetting lever
12 Outlet chamber
13 By-pass
the diaphragm as sembly 6; as a consequence the control
lever 3 triggers, releasing the stem-valve plug assembly
4. By effect of the force of the spring 7, the assembly 4
comes immediately into contact with the valve 8 cutting
automatically the flow of the gas.
29