Water Mist Systems

 

TOMCO₂ MISTEX® Intermediate Pressure Water Mist Systems Manual

TOMCO2 FOGEX® High Pressure Water Mist Systems Manual

Pressure Gauge

Key Features:

• Stainless Steel case & bezel
• Pitospher bronze Bourdon tube
• Dual scale psi & bar
• Accuracy ± 2% FSD
• Temperature range - 40° to 180°F
• Pressure Range 0 - 3000 psi
• Glycerin filled
• 4” Diameter
• 1/4” NPT back port
• FM Approved

Check Valves

When a pump set system is used to deliver water under pressure to the nozzle distribution grid and particularly when two or more high pressure pump sets are manifolded together to deliver the correct water flow and pressure, non-return valves shall be installed to prevent pressurized water from returning to another pump. This is required to avoid pump damage and to avoid water by-passing to a non-used (idle) pump.

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Water Cylinder Assembly

The water cylinders are non pressurized in the stand-by condition. When the system is activated, pressure from the nitrogen cylinder is connected to the water cylinder and the nitrogen pressure forces the water up the dip tube and into the piping network to the nozzle.

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Water Flexible Discharge Bend

The Water Cylinder flexible discharge bend P/N 980064 as a 1/2” extra heavy flexible hose which connects the outlet of the water cylinder actuation head to the system piping or header manifold. The discharge bend has a 1/2” NPT swivel connection on one end and a 1/2” NPT union connection on the other end.

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Nitrogen Solenoid Actuator

Electrical actuation of a nitrogen cylinder is accomplished by a nitrogen solenoid actuator P/N 980027 interfaced thru an FM approved releasing panel. A local manual override valve actuator must be installed on top of the actuator to provide and emergency manual override in case or failure to the automatic operation. The solenoid actuator has nominal operating voltage of 24VDC @ 0.5amps ± 10%.

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Pressure Regulator

The pressure regulator P/N 980031 is used to reduce the nitrogen pressure to 1600 psi (110 bar) system operating pressure for the self contained pressure Skid Module (PSM) system. The pressure regulator mounts directly to the pressure differential valve on the nitrogen cylinder and factory set and is not field adjustable. A pressure regulator is required on both the master and slave nitrogen cylinders. The outlet of the regulator is  connected directly to the inlet port on the water cylinder actuator head.

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Nitrogen Cylinder Assembly (Master)

The master nitrogen cylinder assembly is used to store nitrogen and upon activation is used to pressurize the water cylinders to expel the water into the system at 1600 psi. One master or slave cylinder will provide discharge pressure for up to three water cylinders. If additional nitrogen cylinders are required, a slave nitrogen cylinder can be added for three additional water cylinders.

There is no limit to the number of nitrogen cylinders and water cylinders the can be manifold together to provide the required volume of water. The nitrogen cylinders are equipped with a custom control head that will require a special CGA adapter for refilling. The cylinders are Dot rated and can be refilled at an gas filling station.

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Manual Actuator

The manual actuator P/N 980062 is installed on top of the solenoid actuator to provide an emergency manual release that is fully mechanical that can be used to activate the nitrogen cylinder by direct means case of failure to the normal electrical operation of the solenoid. Manual activation is accomplished by pulling the safety pin and pushing the lever handle in a downward motion.

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Pneumatic Actuator

The pneumatic actuator P/N 980061 is used activate the “slave” nitrogen cylinders when two or more nitrogen cylinders are required. The actuator is mounted to the pressure differential valve on the nitrogen cylinder and activated by pneumatic pressure from the master cylinder.

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Nozzles

There are two types of Fogex nozzles that are available, the F20 and F27. The F20 nozzle is used or open head total flood deluge systems and the F27 is used for screening unenclosable openings to prevent oxygen entering the protected area.

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Water Cylinder Pressure Gauge

Key Features:

• Fits all Fogex deluge and automatic type Nozzles.
• Prevents nozzle damage and marking with ordinary spanners
• Stainless Steel case & bezel
• Pitospher bronze Bourdon tube
• Accuracy ± 1.6% FSD
• Temperature range - 40° to 180°F
• Pressure Range 0 - 3000 psi
• Glycerin filled
• 2” Diameter
• 1/4” NPT back port
• FM Approved

Nitrogen Cylinder Assembly (Slave)

The slave nitrogen cylinder assembly is used to store nitrogen and upon activation is used to pressurize the water cylinders to expel the water into the system at 1600 psi One master or slave cylinder will provide discharge pressure for one water cylinder. If additional nitrogen cylinders are required, a slave nitrogen cylinder can be added for each additional water cylinder.

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Filters

Water filters must be used for all Fogex systems. An water filter should be installed on the water delivery side after the pump or down stream of any zone control valves. The in-line water filters provide maximum system protection to prevent nozzle blockage.

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Ball Valves

TOMCO₂ Fire Systems has a complete range of F.M. Approved manual, 316 stainless steel high pressure ball valves for use with the FOGEX® system. Each ball valve is designed with a full port, meaning that there are no restrictions to cause excessive pressure losses. Manual ball valves are manufactured to exacting standards and in accordance with our Quality Assurance procedures. Manual ball valves are manufactured in five sizes ranging from ½”, ¾”, 1”, 1.5” and 2”. They have an operating pressure of 2,500 psig.

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Zone Control Valves

FOGEX® Water Mist System zone valves are designed to operate utilizing electrical service for actuation. When a system is designed to actuate automatically, actuation is via electrical signals originating from the fire control panel sent to the appropriate electric zone valve to open and a start the fire pump (if provided).

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Strainers

In-line Strainers must be used for all FOGEX® Systems. An in-line strainer should be installed on the water suction inlet preceding the pump and installed on the water fill line to the storage tank. The in-line water strainers provide maximum system protection to prevent foreign material from entering the pump or water storage tanks.

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FOGEX® Nozzle Tool

Key Features:

• Fits all Fogex deluge and automatic type Nozzles.
• Prevents nozzle damage and marking with ordinary spanners
• No adjustments required - One tool fits all nnozzles
• Sturdy Stainless steel construction for long life
  

Pumps

The FOGEX pumps can be used in lieu of the stored pressure skid modules (PSM’s), when larger quantities of water are required. The pump systems can be arranged to take suction from an atmospheric storage tank or directly from a water supply.

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