PSV UNF 21/D280-2 -A 2 H 40/40 A 280 B 280/EA/UNF 2 -A 2 H 40/40 A 280 B 280/EA/UNF 2 -A 2 H 40/40 A 280 B 280/EA/UNF 2 -A 2 H 40/40 A 280 B 280/EA/UNF 2 -A 2 H 40/40 A 280 B 280/EA/UNF 2 -A 2 H 40/40 A 280 B 280/EA/UNF 2 -A 2 H 40/40 A 280 B 280/EA/UNF 2 Proportional Spool Valves