1. Borbotech BV • Tel.: +31(0) • •

2. Borbotech BV • Tel.: +31(0) • •

3. Corrosion Monitors
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4. Corrosion in Fire Protection Systems
Corrosion involves the reaction between a ferrous metal or alloy and its environment. It is an irreversible interfacial process, which causes the gradual or sometimes accelerated deterioration of a piping system due to the interaction between a ferrous metal, water (or moisture), and oxygen.
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5. Figure 1.1
Figure 1.1 shows a schematic illustration of iron (Fe) corrosion in water. The Fe dissolves into Fe2+ at the anode, liberating electrons (e-) to reacting with O2 and water to form hydroxide ions (OH-) at the cathode (oxygen reduction reaction). In general, when a fire protection system is supplied with sprinkler water containing oxygen, corrosion of steel or galvanized steel pipe (anodic reaction) in the fire sprinkler system will occur and continue, until oxygen in the water (cathode reaction) is depleted by the corrosion reactions.
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6. Life Expectancy of a Fire Sprinkler System
• Wet Systems: Within a 25 year period of time from installation 35% of metallic pipe systems will have what would be considered significant corrosion issues.*
• Dry Systems: Within a 12 ½ year period of time from installation 73% of metallic pipe systems will have what would be considered significant corrosion issues.*
Source: Vds 5484 nl: (01)
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7. Corrosion Related Costs
Possible Safety Related Costs
• Possible reduced efficiency of installed system • Possible increased loss of property due to reduced system efficiency • Possible increased personal injuries due to reduced system efficiency
Probable Facility Legacy Related Costs
• Corrosion related failures result in unplanned, area or building shutdowns • Production interruptions and occupant relocation • Retrofit cost that can be as high as 2x to 3x the original cost of installation*
Source: American Fire Sprinkler Association
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8. Corrosion Monitors Model 7700 In-Line Pipe Sizes: 2” 2.5” 3” 4” 6” 8”
The CORRINSITE M7700 In-Line Pipe Corrosion Monitor is suitable for new construction and can be retrofitted into existing fire protections systems. It is available in schedule 10 or 40, powder- coated black steel or galvanized pipe.
Sizes: 2”
2.5” 3” 4” 6” 8”
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9. Corrosion Monitors Model 7800 Mechanical Tee Sizes: 2” 2.5” 3” 4” 6”
The CORRINSITE M7800 Mechanical Tee Corrosion Monitor is suitable for retrofitting into existing fire protection systems and is available with a painted red or galvanized steel mechanical tee.
Sizes: 2”
2.5” 3” 4” 6” 8”
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10. Wear Dimension
Wear Dimension = 1mm
360° Corrosion Chamber
Wall Thickness* = 5,5mm
Wall Thickness* = 3mm
CORRINSITE
1/5 Thickness
1/3 Thickness
Schedule 40
*2 ½” 3”, 4”
Schedule 10
*2 ½”, 3”, 4”
Borbotech BV • Tel.: +31(0) • •

11. Installation Locations
Recommended
Installation Locations
Wet System
(Office Building)
Dry System
(Parking Garage)
Water Main
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12. Installation Locations
Recommended
Installation Locations
Wet System
(Office Building)
Dry System
(Parking Garage)
Floor Control
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13. Installation Locations
Recommended
Installation Locations
Wet System
(Office Building)
Dry System
(Parking Garage)
End of Line
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14. Installation Locations
Recommended
Installation Locations
Wet System
(Office Building)
Dry System
(Parking Garage)
Branch Line
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15. Plug Orientation
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16. Air Venting Valves

17. NFPA 13 (2016 Edition)
7.1.5 Air Venting A Single air vent with a connection conforming to shall be provided on each wet pipe sprinkler system utilizing metallic pipe.
8.16.6* Air Venting The vent required by shall be located near a high point in the system to allow air to be removed from that portion of the system by one of the following methods: (1) Manual valve, minimum ½” (15mm) size (2) Automatic air vent (3) Other approved means

18. 3.3.23* Sprinkler System A system that consists of an integrated network of piping designed in accordance with fire protection engineering standards that include a water supply source, a water control valve, a water flow alarm, and a drain.
A As applied to the definition of a sprinkler system, each system riser serving a portion of a single floor of a facility or where individual floor control valves are used in a multistory building should be considered a separate sprinkler system. Multiple sprinkler systems can be supplied by a common supply pipe.
8.2.4 Floor Control Valve Assemblies * Multistory buildings exceeding two stories in height shall be provided with a floor control valve, check valve, main drain valve, and flow switch for isolation, control, and annunciation of water flow for each individual floor level.

19. Borbotech BV • Tel.: +31(0) • •

20. Automatic Air Venting Valves
Model 7900AAV
The PURGENVENT M7900AAV Air Venting Valve is a 1” ball valve with a stainless steel strainer, air vent, and purge valve with hose threads. This M7900AAV is designed to allow rapid purging, and automatic venting of air from the wet fire sprinkler system while it is being filled with water, and after it is filled.
Borbotech BV • Tel.: +31(0) • •

21. Air Venting Valves Features
Forged brass body, 300 PSI Rating, 1” NPT inlet
Stainless steel 20 mesh strainer
Orientation of purge valve field is adjustable
Purge valve with hose connection, thread cap, and lanyard
Conical air vent maximizes clearance between water level and vent valve, ½” NPT outlet
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22. Air Venting Valves Model 7950ILV
The PURGENVENT M7950ILV Main Line Air Vent is a patent pending pipe separation chamber specifically engineered to purge air as the wet fire sprinkler system is filled and automatically vent air once the system is operational. Any air remaining in the system is vented through the Model 7900AAV helping to prevent corrosion.
Alternate Orientation
• Save Space
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23. Air Venting Valves Features
Separation chamber, powder coated safety red, groove ends
Includes M7900AAV
Air scoop, cast bronze
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24. Manual Air Venting Valves
Model 7910MAV
The PURGENVENT M7910MAV Manual Air Venting Valve was designed to meet the new NFPA 13 standards regarding the venting of excess air from a wet fire sprinkler system to help prevent corrosion.
OPTIONAL DRAIN
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25. Installation Locations
Model 7910 MAV The most basic solution to meet NFPA 13 section The 7910MAV is placed in the open position during system filling and then closed when the system is operational. The 7910MAV can be opened and then closed after system testing to exhaust any remaining air. The 7910MAV can also be installed at the top of the riser to vent air that collects at the top of the supply column.
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26. Installation Locations
Model 7900 AAV The purge valve allows large volumes of air to be exhausted from the system during filling and the automatic vent allows for the continuous evacuation of air when the system is operational; optional notification and moisture collection assemblies available AAV air vents are not recommended for installation above closed ceilings.
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27. Installation Locations
Model 7950 ILV The purge valve allows large volumes of air to be exhausted from the system during filling and the automatic vent allows for the continuous evacuation of air when the system is operational. Designed to be near the floor control assembly for use in system’s desiring automatic venting when the end of the line would not be easily accessed. We recommend installing a 7910MAV at the end of the line in conjunction with the 7950ILV.
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