Component Descriptions
April 2020 2-26 06-237619-001
2-8.3 Nitrogen Pilot Cylinders
Two different sized cylinder capacities are provided for use with Kidde IGS systems. Each cyl-
inder is of steel material and designed in accordance with USDOT and TC requirements. Each
cylinder is factory pressurized to 1800-psig @ 70F and fitted with a pressure gauge and pres-
sure relief device. Either pipe, tube or flexible hose connects each pilot cylinder to the siren or
the discharge delay.
2-8.3.1 108 cu. in. Nitrogen Pilot Cylinder
The 108 cu. in. N
2
pilot cylinder (P/N WK-877940-000) can be used to operate one N
2
pressure
operated siren or one discharge delay. Any compatible control head can be fitted to the pilot
cylinder to provide the desired means of operation. The cylinder valve has a 1/8-in NPT outlet.
Any of the 1/8-in NPT x 5/16-in flare fittings can be used to connect the valve to the siren or
discharge delay line. The cylinder is secured using the wall mount bracket (P/N WK-877845-
000). Approved for use in environments from 32°F to 130°F (0°C to 54°C).
2-8.3.1.1 5/16” Flare x 1/8” NPT Male Connector
Use a 1/8-in NPT x 5/16-in flare fitting (P/N WK-699205-010) to connect the valve of the 108
cu. in. pilot cylinder to the corresponding siren line.
2-8.3.1.2 108 cu. in. Nitrogen Pilot Cylinder Mounting Bracket,
Use the wall mount bracket (P/N WK-877845-000) to secure a 108 cu. in. pilot cylinder.
Note: This bracket can also be used to mount the nitrogen time delay.
2-8.3.1.3 30” Actuation Hose
Use the actuation hose (P/N WK-264986-000), to connect a pilot cylinder to the siren or dis-
charge delay valve. The 1/4-inch flexible hose is constructed with wire-braided reinforcements
and swivel nuts at both ends for ease of assembly.
Figure 2-33. 1/4-inch Actuation Hose
Table 2-24. Kidde IGS Nitrogen Pilot Cylinder Part Numbers
Part Number Description
06-129773-001 108 cu. in. (1.77 L) Nitrogen Pilot Cylinder with Supervisory
Pressure Switch, Normally Open Under Pressure
90-101040-200 1040 cu. in. (17.0 L) Nitrogen Pilot Cylinder with pressure switch
5/16 in. TUBING COUPLING
(BOTH ENDS)
1-3/8 in.
(35 mm)
HOSE - 1/4 in. I.D.
5/8 in. HEX SWIVEL
NUT (BRASS)
30 in.
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