Inergen Clean Agent Fire Suppression System
Inergen 200 Bar System Specifications
INERGEN agent is a mixture of three naturally occurring gases: nitrogen, argon, and carbon dioxide. As INERGEN agent is derived from gases present in the earth’s atmosphere, it exhibits no ozone depleting potential, does not contribute to global warming, nor does it contribute unique chemical species with extended atmospheric lifetimes. Because INERGEN agent is composed of atmospheric gases, it does not pose the problems of toxicity associated with the chemically derived Halon alternative agents.
The INERGEN Fire Suppression System, manufactured by ANSUL, is an engineered system utilizing a fixed nozzle agent distribution network. The system is designed and installed in accordance with the National Fire Protection Association (NFPA) Standard 2001, ‘‘Clean Agent Fire
Extinguishing Systems.’’ When properly designed, the INERGEN system will extinguish surface burning fire in Class A, B, and C hazards by lowering the oxygen content below the level that supports combustion.
INERGEN agent has also been tested by FM Approvals for inerting capabilities. Those tests have shown that INERGEN agent, at design concentrations between 40% and 50%, has successfully inerted mixtures of propane/air, and methane/air.
The system can be actuated by detection and control equipment for automatic system operation along with providing local and remote manual operation as needed. Accessories are used to provide alarms, ventilation control, door closures, or other auxiliary shutdown or functions.
When INERGEN agent is discharged into a room, it introduces the proper mixture of gases that will allow a person to breathe in a reduced oxygen atmosphere. A system installation and maintenance manual is available containing information on system components and procedures concerning design, operation, inspection, maintenance, and recharge.
The system is installed and serviced by authorized distributors that are trained by the manufacturer.
The INERGEN system is particularly useful for suppressing fires in hazards where an electrically non-conductive medium is essential or desirable; where clean-up of other agents present a problem; or where the hazard is normally occupied and requires a non-toxic agent. The following are typical hazards protected by INERGEN systems:
- Computer rooms
- Tape storage
- Process equipment
- All normally occupied or unoccupied electronic areas where equipment is either very sensitive or irreplaceable
Watch this video on the INERGEN Clean Agent Fire Suppression System
Composition and Materials – The basic system consists of extinguishing agent stored in high strength alloy steel cylinders. Various types of actuators, either manual or automatic, are available for release of the agent into the hazard area. The agent is distributed and discharged into the hazard area through a network of piping and nozzles. Each nozzle is drilled with a fixed orifice designed to deliver a uniform discharge to the protected area. On large hazards, where three or more cylinders are required, a screwed or welded pipe manifold assembly is employed. The cylinder(s) is connected to the distribution piping or the manifold by means of a flexible discharge bend and check valve assembly.
Additional equipment includes – Control panels, releasing devices, remote manual pull stations, corner pulleys, door closures, pressure trips, bells and alarms, and pneumatic switches. All or some are required when designing a total system.
INERGEN Agent – INERGEN agent is a mixture of three inerting (oxygen diluting) gases: 52% nitrogen, 40% argon, and 8% carbon dioxide. INERGEN gas extinguishes fire by lowering the oxygen content below the level that supports combustion. When INERGEN agent is discharged into a room, it introduces the proper mixture of gases that still allow a person to breathe in a reduced oxygen atmosphere. It actually enhances the body’s ability to assimilate oxygen. The normal atmosphere in a room contains 21% oxygen and less than 1% carbon dioxide. If the oxygen content is reduced below 15%, most ordinary combustibles will cease to burn. INERGEN agent will reduce the oxygen content to approximately 12.5% while increasing the carbon dioxide content to about 3%. The increase in the carbon dioxide content increases a person’s respiration rate and the body’s ability to absorb oxygen. Simply stated, the human body is stimulated by the carbon dioxide to breathe more deeply and rapidly to compensate for the lower oxygen content of the atmosphere.
Cylinders – The cylinders are constructed, tested, and marked in accordance with applicable Department of Transportation (DOT) specifications. As a minimum, the cylinders must meet the requirements of DOT 3AA3000.
Cylinder Assembly – The cylinder assembly is of steel construction with a red standard finish. One size is available. Each cylinder is equipped with a pressure seat-type valve equipped with gauge. The valve is constructed of forged brass and is attached to the cylinder providing a leak tight seal. The valve also includes a safety pressure relief device which provides relief at 4000-4480 psi (276-309 bar) per CGA test method. Cylinder charging pressure is 2900 psi at 70 °F (200 bar a 21 °C). The cylinders are shipped with a maintenance record card and shipping cap attached. The cap is attached to the threaded collar on the neck of each cylinder to protect the valve while in transit. The cylinder serial number and date of manufacture are stamped near the neck of each cylinder.
Electric Actuator – Electric actuation of an agent cylinder is accomplished by an electric actuator interfaced through an AUTOPULSE® Control System. This actuator can be used in hazardous environments where the ambient temperature range is between 32 °F and 130 °F (0 °C and 54 °C). In auxiliary or override applications, a manual lever actuator can be installed on top of the actuator.
Manual or Pneumatic Actuators – Three types of manual actuators are available for lever actuation on the cylinder valve. Manual actuation is accomplished by pulling the hand lever on the actuator.
Detection System – The AUTOPULSE Control System is used where an automatic electronic control system is required to actuate the INERGEN system. This control system is used to control a single fixed fire suppression or alarm system based on inputs received from fire detection devices. The detection circuits can be configured using cross, counting, independent or priority-zone (counting) concepts. The control system has been tested to the applicable FCC Rules and Regulations for Class A Computing devices.
Nozzles – Nozzles are designed to direct the discharge of INERGEN agent using the stored pressure from the cylinders. Nozzles are available in either 360° or 180° discharge patterns. The system design specifies the nozzle and orifice size to be used for proper flow rate and distribution pattern. The nozzle selection depends on the hazard and location to be protected.
Pressure Reducer – The pressure reducer is required in the distribution piping to restrict the flow of INERGEN agent, thus reducing the agent pressure down stream of the reducer. The pressure reducer contains a stainless steel orifice plate which is drilled to the specific size hole required based on the hydraulic calculation. The orifice plate provides readily visible orifice identification. The pressure reducer is available in nine sizes: 1/2 in., 3/4 in., 1 in., 1 1/4 in., 1 1/2 in., 2 in., 2 1/2 in., 3 in., and 4 in. NPT.
Pipe and Fittings – System manifold piping must be constructed to withstand a minimum pressure of 3000 psi (206.9 bar). Distribution piping downstream from the orifice union must be constructed to withstand the maximum downstream pressure as determined by the flow calculation.
Limitations – The INERGEN system must be designed and installed within the guidelines of the manufacturer’s design, installation, operation, inspection, recharge, and maintenance manual. The ambient temperature limitations are 32 °F to 130 °F (–0 °C to 54 °C). All AUTOPULSE Control Systems are designed for indoor applications and for temperature ranges between 32 °F and 120 °F (0 °C and 49 °C).
Applicable Standards: The INERGEN system complies with NFPA Standard 2001, Standard for Clean Agent Fire Extinguishing Systems, and EPA Program SNAP, Significant New Alternate Policy.
- System is listed by Underwriters Laboratories, Inc. (UL) and FM Approvals.
- Agent is listed and approved by Underwriters Laboratories, Inc. (UL) and FM Approvals.
All system components and accessories must be installed by personnel trained by the manufacturer. All installations must be performed according to the guidelines stated in the manufacturer’s design, installation, operation, inspection, recharge, and maintenance manual.
Availability and Cost
Availability – INERGEN Systems are sold and serviced through a network of independent distributors located in many countries.
Cost – Cost varies with type of system specified, size, and design.
Warranty – The components of the fire suppression system supplied by Ansul Inc. (‘‘ANSUL’’) are warranted to you as the original purchaser for one year from the date of delivery against defects in workmanship and material. ANSUL will replace or repair any ANSUL supplied components, which, in its opinion, are defective and have not been tampered with or subjected to misuse, abuse, or exposed to highly corrosive conditions provided that written notice of the alleged defect shall have been given to ANSUL within 30 days after discovery thereof and prior to the expiration of one year after delivery, and further provided that if ANSUL so instructs, such article or part thereof is promptly returned to ANSUL with shipping charges prepaid.
Disclaimer of Warranty and Limitation of Damage – The warranty described above is the only one given by ANSUL concerning this system. ANSUL MAKES NO OTHER WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE. ANSUL’S MAXIMUM RESPONSIBILITY FOR ANY CLAIMS WHETHER IN CONTRACT, TORT, NEGLIGENCE, BREACH OF WARRANTY, OR STRICT LIABILITY SHALL BE LIMITED TO THE PURCHASE PRICE OF THE SYSTEM. UNDER NO CIRCUMSTANCES SHALL ANSUL BE RESPONSIBLE FOR SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES OF ANY KIND. ANSUL does not assume or authorize any other person to assume for it any additional liability in connection with the sale of this system.
For repairs, parts, and service of the ANSUL fire suppression system, contact a local ANSUL international representative, or Ansul Incorporated, Marinette, WI 54143-2542, 715-735-7411.
False Discharge Warranty
Subject to the conditions set forth below, ANSUL will, as purchaser’s sole remedy, replace INERGEN gas and pay reasonable costs to recharge the INERGEN/Detection and Control System where, in ANSUL’s opinion, the discharge has occurred due to a defect in the material or workmanship of the products provided by ANSUL. This warranty is extended only to the original purchaser of the INERGEN/Detection and Control System and only for a period of one year from the
date of installation of the INERGEN/Detection and Control System.
ANSUL will only replace INERGEN gas and pay reasonable costs to recharge the INERGEN/Detection and Control System where the discharge occurs due to a defect in the material or workmanship of the products provided by ANSUL. For example, ANSUL will not be responsible for discharges due to faulty maintenance or installation or service, intentional acts by the owner or third parties, or circumstances over which ANSUL has no control. ANSUL will not be responsible for discharges of the INERGEN/Detection and Control System which occur if the INERGEN/Detection and Control System, as initially installed, has been altered or modified.
This warranty shall be effective only if the original purchaser maintains a semi-annual service agreement for the INERGEN/ Detection and Control System with an Authorized ANSUL Distributor from the date of installation. This warranty covers only those INERGEN/Detection and Control Systems purchased from ANSUL or its Authorized Distributors and only those INERGEN/Detection and Control Systems which incorporate and use only hardware and components, including detection and control devices manufactured, sold, or approved by ANSUL. This warranty may not be assigned or transferred to others.
ANSUL Product Services Department must be notified within three days of the discharge of the INERGEN/Detection and Control System and must approve the cost of INERGEN gas and recharge service in advance.
Except as provided above, ANSUL MAKES NO WARRANTIES OF ANY KIND, WHETHER EXPRESSED OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, UNDER NO CIRCUMSTANCE SHALL ANSUL HAVE
ANY LIABILITY FOR CONSEQUENTIAL, INCIDENTAL, SPECIAL OR SIMILAR DAMAGES. ANSUL SHALL HAVE NO LIABILITY FOR ANY DAMAGES DUE TO DELAY IN RECHARGING THE ‘‘INERGEN’’/DETECTION AND CONTROL SYSTEM. ANSUL’S MAXIMUM LIABILITY FOR DIRECT DAMAGES IS LIMITED TO THE REPLACEMENT OF INERGEN GAS AND REASONABLE COSTS TO RECHARGE THE ‘‘INERGEN’’/DETECTION AND CONTROL SYSTEM.
This warranty is not effective unless Ansul Form No. F-9346 is completed and returned to ANSUL within 10 days of the commissioning of the INERGEN/Detection and Control System.
Maintenance is a vital step in the performance of a fire suppression system. As such, it must be performed by an authorized ANSUL distributor in accordance with NFPA 2001 and the manufacturer’s design, installation, recharge, and maintenance manual. When replacing components on the ANSUL system, use only ANSUL approved parts.
For information on the proper design and installation, contact a local international authorized INERGEN System distributor. The ANSUL applications engineering department is also available to answer design and installation questions. Call 715-735-7411.