35
Section 2 Installation
GF135 Inlet Valve Installation
When installing the GF135 –
1. Connect the MFC tubing labeled "IN" to a CDA or N2 supply of 90 ±3 psi.
2. Next, the MFC tubing labeled "OUT" should be connected to the
customer upstream pneumatic isolation valve.
Note – The air passes through a failsafe normally open valve inside the
GF135 and is connected back to the inlet isolation valve. For safe
operation and in line with S2 compliance, the GF135 cannot override and
open the inlet isolation valve.
Figure 2-19 GF135 Series Showing Inlet/Outlet Pneumatic Isolation Valve Lines
Outlet - Pneumatic
Isolation Valve
Line
Inlet - Pneumatic
Isolation Valve Line
