Twin-Agent Units

Extremely hazardous fires require top-level skills and innovative agents. Twin-Agent Fire Suppression Systems provide proven technology to fight large flammable liquid and gas fires. Twin-agent technology combines the fast flame knockdown of a dry chemical with the fire securing capabilities of aqueous film-forming foam. The twin-agent attack provides the most effective extinguishing and securing capability known for many flammable liquid fires. Industries that benefit most from the system include petroleum and petrochemical, marine, natural gas, and aviation.

The Twin-Agent System combines two proven, powerful agents: Purple-K dry chemical agent and ANSULITE AFFF. A potassium bicarbonate-based dry chemical, Purple-K provides rapid knockdown and suppression of flammable liquid fires. ANSULITE AFFF is synthetic, aqueous film-forming foam that blankets the fuel with a thin film, preventing the escape of flammable vapors and cooling the site.

The system is designed to be actuated and operated by one person. If the system has more than one hose reel, additional personnel can be added to fight the fire. It is available in skid, trailer and vehicle mounted variations. Pre-engineering allows customers to build the exact capacity system to protect the hazard area.



  • Documents
  • Options
Document Type  

Document Name Document Type
Language FileName Action
ANSUL Large Manual Firefighting Units Product Overview (Rev. 01) Brochure/Flyer English F-2013119.pdf View
S-CR-LR-K-350-C Stationary Dry Chemical System Data Sheet (Rev. 02) Data/Specification Sheet English F-2009132.pdf View
S-CR-LR-K-350-C 固定式干粉系统 数据/规格 Data/Specification Sheet Chinese F-2009132_ZH.pdf View
S-CR-LR-K-350-C Système Fixe á Poudre Chimique Données/Spécifications (A4) Data/Specification Sheet French F-2009132_FR.pdf View
S-CR-LR-K-350-C Стационарная Установка Порошкового Огнетушения Технические характеристики (A4) Data/Specification Sheet Russian F-2009132_RU.pdf View
S-CR-LR-K-350-C Sistema Fijo de Polvo Químico Datos/Especificaciones (A4) Data/Specification Sheet Spanish F-2009132_ES.pdf View
Model S-150-C and Model S-350-C Compact Stationary Extinguisher Data Sheet (Rev. 01) Data/Specification Sheet English F-2007056.pdf View
Hand Hose Line Stationary Dry Chemical Systems Data Sheet (Rev. 01) Data/Specification Sheet English F-2006148.pdf View
ANSUL 100/30 Self-Contained Twin-Agent Hand Hose Line Systems Fire Suppression System Data/Specification Sheet (Rev. 05) Data/Specification Sheet English F-80103.pdf View
ANSUL Twin-Agent Nozzle (Over/Under Model) Hand Hose Line Systems Data/Specification Sheet (Rev. 05) Data/Specification Sheet English F-8028.pdf View
ANSUL PURPLE-K Dry Chemical Suppressing Agent Data Sheet (Rev. 04) Data/Specification Sheet English F-7549.pdf View
СУХОЕ ХИМИЧЕСКОЕ ОГНЕТУШАЩЕЕ ВЕЩЕСТВО Purple-K Данные/Технические характеристики (Rev. 02) Data/Specification Sheet Russian F-7549_RU.pdf View
ANSUL PLUS-FIFTY C Dry Chemical Suppressing Agent Data Sheet (Rev. 06) Data/Specification Sheet English F-7548.pdf View
ANSUL Twin-Agent Firefighting/Securing Systems Specifications (Models 450/50, 450/100, 900/100 AND 1350/200) (Rev. 01) Specifications English F-90127.pdf View
ANSUL Sistemas de Proteção/Combate ao incêndio de Agente Duplo Especificações - Modelos 450/50-B, 450/100-B, 900/100-B (Rev. 01) (Brazilian Portugeuse) Specifications Brazilian Portuguese F-90127_BPT.pdf View
ANSUL Twin-Agent Fire Fighting/Securing Systems Specifications - Models 450/50-B, 450/100-B, 900/100-B (Rev. 01) (Latin American Spanish) Specifications Latin American Spanish F-90127_LAS.pdf View
ANSUL Technical Bulletin - Dry Chemical Clean-Up Procedures (Rev. 01) Technical Bulletins English F-97146.pdf View
ANSUL Technical Bulletin - Hydrostatic Retest Requirements for ANSUL Pressure Vessels - Portables, Wheeled Units and Pre-Engineered Pressure Vessels (Rev. 12) Technical Bulletins English F-81301.pdf View
ANSUL Technical Bulletin - Hydrostatic Testing For Large Dry Chemical Containers (Rev. 02) Technical Bulletins English F-76111.pdf View
ANSUL Technical Bulletin - Replacement Components and Service - Genuine ANSUL replacement components recommended for installation on ANSUL products (Rev. 02) Technical Bulletins English F-8922.pdf View
ANSUL Technical Bulletin - Checking Nitrogen Cylinder Pressures With Temperature Correction Chart (300 Ft³ (8.49 m³) and 400 Ft³ (11.32 m³) Cylinders) (Rev. 03) Technical Bulletins English F-8834.pdf View
ANSUL Technical Bulletin - Fire Protection for Metal Alkyls (Rev. 02) Technical Bulletins English F-8086.pdf View


Agent options:

The Twin-Agent System combines ANSULITE AFFF (aqueous film-forming foam) with one of two dry chemical options:

Purple-K—A potassium bicarbonate-based dry chemical that is the most effective ANSUL dry chemical agent for Class B and C fires.

PLUS-FIFTY C—A sodium bicarbonate-based dry chemical for use on Class B and C fires.

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