... with E OR R type electro magnetic valve(1): E-type magnetic valve, adopted if the press stroke were shorter ... or longer to feed material.(2): R-type Release magnetic valve - to release the fixed clamp, adopted to correct ... needed.3.Standard model + E and R type magnetic valve, adopt when the press stroke were shorter or longer ... .819.638.452.48095156178200 Air feeder (E-type solenoid valve)-press machine