gauge classification : standard chamber, large chamber or weld pad gauge glass : tempered borosilicate (local klinger / maxos) in 30mm width as standard. cushion : caf gasket : caf, ptfe , grofoil body (liquid chamber) : ms, cs (en-8), astm a-105, ss304, ss316 or pp cover plate : ms, cs (en-8), astm a-105, ss304, ss316 or pp bolts / nuts : ms or graded alloy steel for high temperature service. cc distance : 1915mm for straight through / 1875mm for hook up in single length. Extended ranges through a coupler. gauge connection : straight through / hook - up. process connection (pc) : flanged to bs, asa, ansi or din / screwed to bsp or npt. orientation (pc) : top / bottom : left, right, rear, vertical isolating valves : integral offset needle valves / inline ball / globe valve. vent : plug drain : plug / needle / ball / globe valve calibrated scale : al/ ss linearly calibrated for level values in mm (lc=10mm) special features : autoball check, frost free, internal heating / cooling