The HFC-227EA automatic fire suppression system is an excellent extinguishing system because it is fast acting and does not create any toxic aftermath. It is designed to put out Class A, B, and C fires. This type of system is perfectly safe to be discharged around humans without worry of harmful chemicals in theextinguishing agent.

HFC-227EA extinguishing system is classified as outside stored pressure and inside stored pressure, according to the stored form of power gas. It can be installed as a pipe network type and cabinet type.

Pressure range 2.5Mpa, 4.2Mpa and 5.6Mpa.

Certification and standard
2001 clean agent fire extinguishing system of NFPA
UL certification (Underwriters Laboratories)

Application
HFC-227ea fire suppression system is suitable for normal commercial and industrial environment. The typical regions that it can protect are bank strong room, library, bookstore, electronic data processing center, telephone switching studio, communication center, transformer and switchgear room, control room, testing lab, inflammable liquid storage room.

Advantages
The fire extinguishing system need only low concentration HFC-227ea, which decreases the blurred vision and the risk to people.
The amount of outgoing chemicals is very little which minimizes the excessive pressurization in protected regions.
Its low toxicity highly ensures the personnel security.
HFC-227ea fire extinguishing system which is designed to be discharged within 10 seconds combining with automatic detection system, it reaches the most best effect.
It can prevent second fire as long as maintaining the concentration level.
This fire suppression system has two optional operating pressure system (25bar/360psi, 42bar/600psi), which makes its superior efficiency.

MOSAFE system subassembly
The typical MOSAFE HFC-227ea gas fire suppression system consists of gas cylinder suite, manual discharge device, guiding hose, emission hose, check valve, manifold, pressure-relief device, directional valve, pressure-operated switch, pipe fittings, nozzle and the units which connects fire suppression system with automatic fire alarm system.
According to different practical applications, some above items can be optional.

Technical parameters
40L,50L,60L,70L,80L,90L,100L,120L,150L and 180Lsteel cylinders all meet the requirements of TPED.

Design processes of fire suppression system
The design of HFC-227ea system must follow the following procedures.
Determine the hazardous substance and the required concentration.
Determine the volume of every cabinet and take out all the impermeable volume in the right place.
Determine the risk altitude and correction coefficient.
Calculate the amount of HFC-227ea of every protected area at lowest design temperature.
Design the container size and filling density.
Choose the type and the position of nozzles.
Design the network of pipes.
Calculate the amount of HFC-227ea of every nozzle.
Check the agent percentage at every flow bypass part.
Identify the length, rising and declining of all pipes, identify the nozzle reference numbers.

The calculation of prefabrication system flow
The MOSAFE prefabrication system is based on the special pressure flow program-MOSAFE flow protection calculation software. The software will forecast the two-phase flows of HFC-227ea and N2 during they go through the network of pipes. Input the detail informations and seal box height, then the program can calculate the required dimension of pipes and nozzles, average nozzle pressure and jetting time. The calculation result finally corresponds with the practical situation.

The system design calculation is critical to the success of fire suppression system. So only the people passed the MOSAFE training can implement the system calculation. In the future, if other company hope to use the program, then the dealers will need to take part in the formal training courses. That is to say, all the system calculation must be internally operated by MOSAFE or authorised suppliers.