TUSA Active Purge Assist

[emoreira]

A friend and dive buddy ask for help with her TUSA Selene BCD. The BCD self inflates.
I started to disassemble the inflator mechanism and I'm surprised with the complexity of it.
Any one has the service manual ?
I could not find any manual in VDH Worldwide Manuals and Catalogs Repository

 

[Wibble]

If it is broken, then you could almost certainly replace it with a standard "K" valve inflator for not much money.

 

[emoreira]

Not broken, only a slight loss.
No, the hose is of a different size and the cord has a threaded conection.

 

[Tanks A Lot]

Maybe the attached is helpful.

While fairly clever, the active purge assist is the textbook definition of over-engineered for me.

 

[emoreira]

Maybe the attached is helpful.

While fairly clever, the active purge assist is the textbook definition of over-engineered for me.

Thanks s lot !
Can’t agree more.

 

[emoreira]

4 springs, 10 o-rings, lots of parts. Is it needed ?

And this is only the valve.

 

[emoreira]

Well, opened, cleaned, o-rings changed, lubed and tested OK.
Complexity is the result of adding the APA system (Active Purge Assist). This valve has 3 push buttons, the two "normal" inflate, deflate and a third, which pneumaticaly opens the remote exhaust valve in the left shoulder. A way to avoid the huge force required to push-open it in "normal" inflators.

 

[Wibble]

Is that better than the i3 BCD?

The beauty of the standard BCD or wing is simplicity. Less to go wrong, more reliability, easier to maintain, cheaper to fix.