Help Id this old first stage

[emoreira]

Hi people, please could anyone help me to identify this old first stage regulator.
Also, if someone has the explosion drawing, would be very helpful.
Thanks.

 

[NotSure]

It may be a early version of the TUSA TR-200. There is a schematic on frogkick.

 

[emoreira]

It may be a early version of the TUSA TR-200. There is a schematic on frogkick.

Thanks for the hint. I could find the schematic. Will try it next weekend.

 

[emoreira]

I could disassemble almost all parts of this first stage. However I don't know how to remove the HP seat.
Help appreciatted.

 

[redacted]

If there is no hole to blow it out, then it is probably a destructive removal. It really should not be removed unless you plan to replace it anyway.

 

[emoreira]

If there is no hole to blow it out, then it is probably a destructive removal. It really should not be removed unless you plan to replace it anyway.

Thanks for you comment !!!!
Just for the record, this seems to a be piston unbalanced 1st stage, right ?

 

[NotSure]

I believe your regulator is a balanced. Once the piston is removed you should be able to push on the seat from the piston side with wood or plastic dowel smaller than the piston stem.

 

[emoreira]

I believe your regulator is a balanced. ....

It seems there is no way to calibrate the IP in this regulator

 

[NotSure]

It seems there is no way to calibrate the IP in this regulator

I'm not familiar with your regulator, but I would guess that like many the IP is adjusted by using shims under the piston spring.

 

[emoreira]

I believe your regulator is a balanced.

Yes, the simplest piston balanced regulator.

Once the piston is removed you should be able to push on the seat from the piston side with wood or plastic dowel smaller than the piston stem.

I removed the HP seat. This is the status. The Piston stem mark is noticeable.