Type RP
5
Figure 5.
RP Series Operational Schematic
OPEraTION
The movements of the diaphragm (D) are transmitted to the valve disc (O) by the stem (S) and the levers system (L). The downstream
pressure through the pulse pipe (I) exerts a force under diaphragm (D) and this force is counteracted by the adjusting springs (M).
The gas pressure on the diaphragm tends to close the valve disc; the antagonist action of the adjustment springs tends to open it.
under normal conditions the balance between these antagonist actions positions the valve disc in such a way as to ensure a constant
pressure and therefore the downstream capacity.
upon any capacity variation tending to cause an increase or decrease of pressure in relation to the pre-set pressure, the moving unit
reacts and finds a new balance, so re-establishing the pressure.
For the OS/66 slam-shut controller operation please see the 0048EN-OS66-IM instruction manual.
D
M
I
L
S
O
