SPR-6
Skum/Tyco SPR-6 — Low-expansion foam sprinkler for deluge systems.
Inspector Detail
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Common issues
- Nozzle orifice blockage from debris, marine growth or paint overspray
- Corrosion of the sprinkler body or nozzle affecting spray pattern
- Foam concentrate degradation or contamination reducing expansion ratio and fire performance
- Deluge valve failure to open or reset correctly, preventing system actuation
- Foam proportioning system (pump/eductor) miscalibration giving incorrect concentrate percentage
- Corroded or seized isolation valves in the piping to individual sprinkler heads
Inspection checklist
- Visually inspect each sprinkler head/nozzle for corrosion, blockage or physical damage
- Confirm foam concentrate stock is within shelf life and stored per maker conditions
- Function-test the deluge valve and confirm alarm/indication at the control panel
- Check the foam proportioning/eductor system delivers the correct concentrate percentage
- Conduct a system discharge test, where permitted, and verify spray pattern and coverage
- Inspect piping and isolation valves for corrosion and free operation
- Verify a foam concentrate sample has been sent for analysis per class requirement
- Check pressure gauges and system pressure against the normal operating range
Service intervals
| Foam concentrate sample analysis | annually, per SOLAS/class requirement for fixed foam systems |
| Deluge valve function test | annually |
| Full system discharge test | per class requirement, commonly every 2-5 years depending on system type and flag - confirm against class requirement |
| Sprinkler head visual inspection | at each fire equipment routine, commonly monthly to quarterly |
Critical spares
- Sprinkler nozzles matching the original K-factor and orifice size
- Deluge valve seal/diaphragm kit
- Foam concentrate of the type and specification approved for the system
- Isolation valve seats/seals
Safety
- Accidental system discharge risk during maintenance - isolate and tag out before working on the deluge valve or piping
- Foam concentrate contact/inhalation hazard - follow the product's safety data sheet
- High-pressure piping hazard during pressure testing
- Slip hazard on deck from residual foam/water after testing
Class survey
Fixed foam systems are checked at fire safety survey against FSS Code Chapter 6 - valid foam concentrate analysis certificate, deluge valve function test record, and confirmation the system covers the protected area at the approved application rate.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Annual foam solution sampling and laboratory ratio analysis; proportioner functional test at maximum and minimum design flow rates per EN 13565-1
Visual inspection of tank exterior for rust, corrosion, or damage; pressure test of tank shell at 1.5x design pressure; bladder elastomer condition assessment; check relief valve operation
Annual tank inspection for sludge accumulation; foam concentrate sampling and laboratory quality testing; check for separation or discoloration; verify storage temperature maintained within -2 to +60°C limits
Manual nozzle actuation test through full fog-to-jet range; visual inspection of nozzle orifice for debris or crystallization; flush test with clean water; verify elevation and rotation movement smoothness
Hydrostatic pressure test of main and branch piping at 1.5x operating pressure; measure water pressure at proportioner inlet, monitor connection, and deluge valve; flush entire piping system annually; inspect for rust or mineral deposits
Type-general inspection and maintenance points for this equipment category — not model-specific.
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