Overrange protection piston valve (data sheet 11500)

11500 Pressure gauge overrange protection device adjustable version 2 connection thread on both sides ½ inch NPT PN 400 piston valves by ARMANO

material (wetted) brass 
stainless steel 
nominal pressure brass version: PN 400 bar, 
stainless steel version: PN 400 bar 
pressure measuring instrument- / process connection bushing - connection 
NPT