INERGEN SYSTEM DESIGN SECONDARY
PILOT CYLINDER REQUIREMENT TABLE
Estimated
Maximum
Maximum
Pilot Cylinders
System Flow Rate
Orifice Diameter
Required
(cu ft./min.)
(inches)
1
5,000
.750
2
9,000
1.063
3
14,500
1.297
4
17,000
1.500
5
24,000
1.672
6
29,000
1.828
7
34,000
1.984
8
37,000
2.109
9
42,000
2.250
10
46,000
2.375
11
51,000
2.500
12
53,000
2.594
13
57,000
2.703
14
59,000
2.797
15
61,000
2.906
STEP NO. 29 – Complete Layout of the System
At this point, all final details of the system can be finalized.
These details include: design of the Pilot Cylinder Actuation
system, bracketing, actuation components, etc.
STEP NO. 30 – Create a Bill of Materials
Create a list of all materials necessary to install the system.
This can be done by hand or by use of the Bill of Materials
Tab in the INERGEN Designer program.
STEP NO. 31 – Create Installation Drawings
The final step in the design of an INERGEN system is com-
pletion of installation drawings for submittal to the appropri-
ate authority and the customer. These drawings should
include all details necessary for installation of this system.
SELECTOR VALVE SYSTEMS
The following information must be considered when design-
ing a selector valve system.
• Each hazard area must be treated as a separate system
design.
• Start with the largest system (system with the highest
estimated flow rate). This is necessary so that the mani-
fold size will handle the maximum quantity of INERGEN.
• After calculating the largest system first, complete addi-
tional system calculations on the remaining systems. Use
the manifold pipe size calculated from first system design
(system with the highest flow rate).
• Selector valve systems can be used for multi-hazards
when all areas are considered separate fire hazards.
• Selector valve can be located either upstream or down-
stream of the pressure reducer.
• The piping located between the pressure reducer and the
selector valve must be rated for pressure of 2900 psi (200
bar) or greater.
• Maximum distance between selector valve and pressure
reducer is 20 ft. (6.1 m).
• When designing the manifold for a selector valve system,
check valves must be installed in the manifold to separate
the actuation of the smaller system(s) from the larger ones.
• A minimum of 10 pipe diameters is required between the
pressure reducer and the selector valve. The pressure
reducer can be located either before or after the selector
valve.
• If the pressure reducer is downstream of a selector valve,
each pressure reducer must utilize its own individual
selector valve.
The following are four typical examples of selector valve
systems:
002714
ADAPTOR PART
NO. 873236 (TYP.)
MALE ELBOW
PART NO. 832334
(TYP.)
TEE, PART NO.
418359 (TYP.)
SECONDARY
PILOT VALVE(S)
PILOT
VALVE
16 IN. STAINLESS
STEEL HOSE
PART NO. 831809 (TYP.)
SECTION V
UL EX-4510 7-15-02 Page 5-11
REV. 1
Design
