Fike Clean Agent System - 2.7 Nozzle Selection

SECTION 2 – DESIGN
UL / ULC Ex4623 Fike Clean Agent System w/ FM-200™ Page 13 of 39
FM 3010715 Manual P/N: 06-215 (Rev G) Revision Date: January. 2010
2.7 NOZZLE SELECTION
The selection of nozzles is generally determined by the amount of HFC-227ea required (flow rate) vs. the flow
rate capabilities of the nozzle(s). Additional factors such as area coverage, nozzle placement, discharge path
obstructions, etc. will have an impact on this decision as well.
2.7.1 SYSTEM TYPE
The system designer must take into account the type of system to be used. For Pre-Engineered Systems, a
balanced flow pattern is required. Therefore, the system is limited to a single nozzle, two nozzle, or four nozzle
configuration. For Engineered Systems, multiple nozzle, flow rate, pipe size, and tee split variations are possible.
2.7.2 NOZZLE FLOW RATES
All HFC-227ea Systems are required to discharge the agent into the protected space within a 6-to-10 second time
window. Therefore, the number of nozzles provided for any area must be capable of delivering the flow rate
required to accomplish this timing criteria.
Each nozzle size is capable of delivering a certain range of flow rates. To determine the number and size of
nozzles required for each area, use the flow rate table below. Note – this information is provided for estimation
purposes only. The final system design MUST be verified using the Fike HFC-227ea Flow Calculation Program.
NOTE: This data is not intended for use when designing a Pre-Engineered System. The flow rates have already
been pre-determined (established) and are reflected in their specific design section. Refer to Section
2.11 for Pre-Engineered System design information.
NOZZLE FLOW RATES (ENGLISH UNITS)
NOMINAL PIPE SIZE
MINIMUM DESIGN FLOW RATE
(System Limitation)
MAXIMUM DESIGN FLOW RATE
(Estimate only)
3/8” NPT 0.7 lbs./sec. 2.0 lbs./sec.
1/2” NPT 1.0 lbs./sec. 3.4 lbs./sec.
3/4” NPT 2.0 lbs./sec. 6.0 lbs./sec.
1” NPT 3.4 lbs./sec. 8.5 lbs./sec.
1-1/4” NPT 5.8 lbs./sec. 13.0 lbs./sec.
1-1/2” NPT 8.4 lbs./sec. 19.5 lbs./sec.
2” NPT 13.0 lbs./sec. 33.0 lbs./sec.
NOZZLE FLOW RATES (METRIC)
NOMINAL PIPE SIZE
MINIMUM DESIGN FLOW RATE
(System Limitation)
MAXIMUM DESIGN FLOW RATE
(Estimate only)
10 mm 0.32 kg/sec. 0.91 kg/sec.
15 mm 0.45 kg/sec. 1.54 kg/sec.
20 mm 0.91 kg/sec. 2.72 kg/sec.
25 mm 1.54 kg/sec. 3.86 kg/sec.
32 mm 2.63 kg/sec. 5.90 kg/sec.
40 mm 3.81 kg/sec. 8.85 kg/sec.
50 mm 5.90 kg/sec. 14.97 kg/sec.