... coupling E type precision casting A,B,C,D,E,F,DC,DP type good quality,outlook and price quick coupling E typeDcamlock coupling Type A ... ,B,C,D,E,F, ... ) 3"-4" 200PSI(14.8bar) 2 1/2" 225PSI(15.8bar)6" 150PSI(10.5bar)6.application:oil,petroleum,chemical ... 20.1(NPT), BS21,DIN259,DIN2999,ISO228. quick coupling E type