Our experts were recently asked the following question: “Please advise when the IG55 system is designed for 200 bar & when for 300bar”

This is our answer:

It is down to each individual project but usually we would use 300bar on most projects as this would use less cylinders and therefore this would usually be a lower cost. We do however use 200bar on small projects when 300bar systems “over gas” the risk.

300bar systems are a relatively new product and historically there are a lot of 150bar and 200bar Inergen Systems in premises because that was the standard product.

If you are replacing the cylinder on a 150bar or 200bar system we would usually suggest using the same manufacturer and cylinder size/pressure as you would need to check the following:

  1. Flow Calculation to ensure the pipework is correct and replace as required.
  2. Check the Over Pressure Vent size and replace as required.
  3. Replace the manifolds.
  4. Replace the nozzles.

The cost of replacing these items will usually end up higher than replacing like for like but it’s worth checking.

If you are needing to replace the cylinders and you are having difficulty replacing like for like then replacing with another manufacturer is possible but again try to use the same size/pressure cylinders. You will still need to check and replace the items above but you should not have to change the Over Pressure Vent or pipework.

If you have a question that you need answering regarding Fire Suppression and Detection Systems just contact us.