BCD TUSA Valve cap removal

[emoreira]

Hi.
I received a TUSA BCD. The valve cap has the cord broken and missed valve knob.
I was trying to remove the valve cap but I couldn't.
The valve cap moves a littel freely in both directions, but it seems that it's not threaded as all other brands.
Does any one know how to remove the valve cap ?
Thanks.

 

[Tanks A Lot]

Tabata certainly has BCDs with the usual screwing off mechanism of the dump valve. I'm not aware of any from them that do not unscrew, which does not mean there are none. Which BCD is this exactly?

Attached are some of the dump valves they used / use.

It could be that you have to use more force than you are initially comfortable with. Sometimes dump valves get stuck quite badly.

 

[emoreira]

It's a TUSA Jasmine