Quote: (Originally Posted by
Dave Sutton)
VERY nice. Well done, and full marks given. Price and delivery for one in 24 volt? I'm rebuilding a Mark-15 for a client and would suggest this as an option for the rebuild.
Best,
Dave
.
No probs Dave, we will be in touch shortly. We've bought stocks of 6v, John is going to check on availability of the 24v unit. As this is a brand new product, it might have to be assembled especially for you.
Quote: (Originally Posted by
jhaaja)
Very nice! Green on its way!
Which units will that fit easily?
JH
The solenoid has an M5 threaded port, so any rebreather that uses an M5 mounting. I am reluctant to give a specific endorsement on all the rebreathers it will fit right now, simply because we have only tested it on one rebreather (well, two or three if you count variants) plus our own.
I will update this thread as we complete tests.
Quote: (Originally Posted by Private message)
It would be helpful to say why you think your solenoid is a better design.
I ask just because it looks like a great addition, but I don't know anything about the old ones, and I'm not an engineer, so I can't judge what your new one fixes.
A lot of PM's have come in asking what the difference is between this solenoid and others. The most fundemental difference is in how the valve opens. Every solenoid requires a component that moves when an electromagnet energizes. In order for that component to move, it must have a ferrous component. Ferrous components rust. Fact. How you deal with corrosion and what effect it has on your life critical system is what counts.
In a lot of other solenoids that use a moving iron core, corrosion on the core allows it to be stuck in the open position. This is due to the core having to slide up and down a tube which has a limited clearance. When corrosion or debris builds up on that clearance, the valve sticks. Our solenoid has no core that slides and the clearance between our electromagnet and the valve seat is such that if there is a build up of anything at all, it will keep the valve closed. So the main difference is failure mode. In the diagrams below a comparison can be made between a simple solenoid and ours. The moving parts are indicated as the red component on ours and item 'V' on the generic.
Secondly is the manufacturing process that I have laboured on in our technical document. Obviously this is a lager cost factor but one which should be seen as a requirment when dealing with oxygen.
Lastly is materials. Not only is our solenoid made completely of stainless steel except the copper wire and the valve seat, the internal components are 'o' ring sealed to prevent failure.