8
HELIX™ Manual
(P/N 26291)
Chapter 2: System Components
Rev A (February 2018)
HELIX™
PCU Fire Suppression System
WARNING: SHIPPING PLATES (FIGURE 2.1a) WILL BE REMOVED AT INSTALLATION AND
RETAINED FOR
LATER USE. DO NOT REMOVE UNTIL DIRECTED TO DO SO.
Agent Cylinders are constructed to meet DOT 4BW, requirements with test pressure of 700 psi
(4826 kPa), and require a hydrostatic test every twelve (12) years or more frequent intervals if
warranted. The operating temperature range of the Agent Cylinders is
-
65°F to 150°F
(
-
54°C to
66°C).
Agent
Cylinder
Part
Number
Overall Height
(A)
in (mm)
Height to Discharge
Opening (B)
in (mm)
Diameter (C)
in (mm)
Agent
Capacity
lb (kg)
HX25ABC PRS SW
26318
17.6 (447)
16.0 (406)
9.0 (229)
25 (11.3)
HX50ABC PRS SW
26320
31.3 (795)
30.0 (762)
9.0 (229)
50 (22.7)
Table 2.1
Figure 2.1b
ANTI
-
RECOIL
PLATE (P/N 10646)
SHIPPING PLATE (P/N 10099)
PRESSURE GAUGE
AGENT CYLINDER VALVE
RUPTURE DISC
(UNDER CAP)
DUST CAP
(P/N 25685)
AGENT CYLINDER
PRESSURE SWITCH
2.1 Agent Cylinders
The Amerex HELIX Fire Suppression System Agent Cylinders are available in two sizes, with
different mounting options and orientations. The Agent Cylinders are shipped fully charged from the
factory. Each Agent Cylinder includes a brass Agent Cylinder Valve with a Pressure Gauge and a
safety Rupture Disc with an installed Dust Cap installed. Agent Cylinders are pressurized with
nitrogen gas to a pressure of 350 psi (2413 kPa) at 70°F (21°C). HX25 and HX50 Agent Cylinders
are equipped with an Anti
-
Recoil Plate (P/N 10646) installed on the Agent Cylinder Valve discharge
outlet to prevent accidental discharge and to minimize recoil in the unlikely event of an accidental
discharge during shipment. (See Figure 2.1a). These safety components are removed only when the
Agent Cylinder is installed in the Cylinder Bracket and connected to Agent Distribution Network.
DISCHARGE
OPENING
Figure 2.1a
DISCHARGE OPENING
HX25ABC
HX50ABC
