rab1412000
Contributor
Diaphragm first stages, regardless of brand are "upstream" designs as the seat and seat carrier are located upstream of the orifice and the tank pressure acts to hold the seat on the orifice. Piston first stages are "downstream" designs as the seat is located downstream of the orifice and tank pressure acts to push the seat off the orifice.
.
does this mean that in all diaphragm 1st stages, in case of valve failure, air will stop?