Page: 11
FM-200® FILL MANUAL
Revision B
Document # DOC180
Issued: August 16, 2010
Revised: April 2, 2012
Section 3 Fill Components
3.2.4 Nitrogen Pressurization Port
e nitrogen pressurization port is located opposite of the gauge connection port and is a 1/4 in (8 mm) male
quick-connect tting that serves as the connection point for the nitrogen supply used to superpressurize
the cylinder assembly. When connected to the cylinder valve, the cylinder ll assembly must be oriented
so that the nitrogen pressurization port is perpendicular to the ground and pointing downwards. e male
quick-connect tting of the gauge connection port contains an internal check valve that prevents agent
from owing through the tting unless it is connected to the nitrogen supply.
3.3 Nitrogen Regulator/Hose Assembly
P/N 99516 (See Figure 3.3)
e nitrogen regulator/hose assembly is comprised
of a self-relieving pressure regulator, a safety
relief valve, and two manually actuated ball valves
connected to hose lines ending in female quick-
connect ttings. e regulator-hose assembly serves
as a connection point between the nitrogen supply
and both the nitrogen pressurization port of the
cylinder ll assembly and the inlet port of the valve
closing adapter. e regulator has a CGA tting for
attaching to the nitrogen supply.
3.3.1 Valve Closing Line
e valve closing line refers to the ex hose and manually actuated ball valve in line with the pressure
regulator. e valve closing line ends with a 1/4 in (8 mm) female quick-connect tting that attaches to
the 1/4 in (8 mm) male quick-connect tting located on the inlet of the valve closing adapter (see Section
3.4). It is used to close the cylinder valve by applying pressure to the top of the cylinder valve piston. e
valve closing line quick-connect tting contains an internal check valve that prevents nitrogen from owing
through the tting unless it is connected to the valve closing adapter.
3.3.2 Cylinder Pressurization Line
e cylinder pressurization line refers to the ex hose and manually actuated ball valve branching o from
the valve closing line and is perpendicular to the outlet of the pressure regulator. e cylinder pressurization
line ends with a 1/4 in (8 mm) female quick-connect tting that attaches to the nitrogen pressurization
port of the cylinder ll assembly. It is used to supply the nitrogen required to superpressurize the cylinder
assembly following agent ll. e cylinder pressurization line quick-connect tting contains an internal
check valve that prevents the nitrogen from owing through the tting unless it is connect to the nitrogen
pressurization port.
Valve Closing Line
Cylinder Pressurization Line
1/4" (8 mm)
Female Quick-Connect
1/4" (8 mm)
CGA Fitting
1/4" (8 mm)
Female Quick-Connect
Nitrogen Regulator
850 psi
(58.6 bar)
Relief Valve
Figure 3.3 Nitrogen Regulator/Hose Assembly
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