Click the series name you are looking for. Digital Catalog Series Port size Set pressure (MPa) 10-/21-ARP20（K） 10-/21-ARP30（K） 10-/21-ARP40（K） 1/8, 1/4 1/4, 3/8 1/4, 3/8, 1/2 0.005 to 0.4MPa 0.005 to 0.2MPa 0.005 to 0.6MPa Operation can be made from the toolbar at the center of the lower portion of the screen. Click here to display the contents. Click here to download the PDF file.