PSV UNF 441/225-3 -A2 H 40/40A 140 B 140S 1/EA/UNF 3 -A2 H 40/40A 210 B 210S 1/EA/UNF 3 -A2 H 40/40A 140 B 140S 1/EA/UNF 3 -A2 H 40/40A 50 B 140S 1/EA/UNF 3 -A2 H 40/40A 210 B 210S 1/EA/UNF 3 -A2 H 40/40A 140 B 140S 1/EA/UNF 3 -A2 H 40/40A 210 B 210S 1/EA Proportional Spool Valves