NOVEC SYSTEM

[Ciaci]

Hi all,
I am designing a total flooding Novec plant. The Same cylinders have to protect multiple hazard volumes. So for the first time I have to design a plant with directional valves. I have to use kidde products because of the client decision.
But there is something in this datasheet that I cannot understand (

http://www.orrprotection.com/docs/kidde/k-90-120_Kidde ADS_10-6-14.pdf

), as it is possible to see in Figure 3, it seems that in order to activate the cylinder are needed 4070 cu. in. driver nitrogen. This is a problem for me beacause of the space issue.
Did someone know if, in this case, it is possible to electrically activate the cylinder without nitrogen drivers?

I tried to contact KIDDE but the italian KIDDE sellers did not answer to my questions.
I hope someone can help me thanks

 

[DM2]

This is their "ADS" (Advanced Delivery System) system. The nitrogen cylinders are referred to as "Driver Cylinders" because the "drive" the agent out of the cylinder and through the discharge piping. The cylinders which contain the NOVEC agent have no nitrogen in them. The same is true for Kidde's version of FM-200 systems.

The reason for this is because nitrogen dissolves into NOVEC and FM-200. When the system is release, and as the pressure in the system (including the cylinders and piping network) drops, the nitrogen comes out of suspension.

Think of it like a 1 liter bottle of soda. Shack it up and you'll see come carbon dioxide bubble to the surface, but you'll see a whole lot more when you remove the cap and the pressure in the bottle decreases (stand back).

The ADS system stores the nitrogen in these Driver cylinders so it doesn't dissolve into the agent. This allows for much smaller pipe, longer pipe runs, and flowing through Kidde's 3-way ball valves, all of which add to the pipe networks equivalent length.

If the Nitrogen cylinder create a store space issue, you may want to consider a Minimax system. These systems are 720 psi in the cylinder, vs. the 360 psi in Kidde's "ECS" (Engineered Central Storage) systems, the later of which stores the nitrogen inside of the cylinders. Minimax also has a selector valve system.

One last word of caution...it sounds like you may be from an engineering firm rather than a distributor of the equipment. If this is the case, save your self the headache and change order which are sure to come down the road, and consult someone with access, knowledge, and experience with the manufacturers hardware. We provide these systems and often we see an engineering firm attempt to layout and design these systems only to have issues during the execution phase of the contract.


Regards,
DM

"Real world Knowledge isn't dropped from a parachute in the sky but rather acquired in tiny increments from a variety of sources including panic and curiosity."