EPDT-089aMODEL GD-26GS, GD-27GSPressure Reducing ValvePRODUCT MANUALThank you very much for choosing the Yoshitake’s product. To ensure the correct and safe use of the product,please read this manual before use. This manual shall be kept with care for future reference.The symbols used in this manual have the following meanings.Warning This symbol indicates a potentially hazardous situation that, if not avoided, couldresult in death or serious injury.Caution This symbol indicates a hazardous situation that, if not avoided, may result inminor or moderate injury or may result in only property damage.Table of ContentsOverview ····································································· 11. Feature ···································································· 12. Specifications2.1 Specifications ······················································ 12.2 Nominal size selection ······································ 2 - 32.3 Flow rate characteristics chart ································ 32.4 Pressure characteristics chart ································· 43. Dimensions and weights·········································· 5 - 64. Operation ································································· 75. Maintenance and inspection5.1 Precaution for operation ···································· 7 - 85.2 Warning and caution for operation ··························· 85.3 Piping example ···················································· 85.4 Adjusting procedure ·············································· 95.5 Troubleshooting ··················································· 95.6 Warning for disassembly and inspection ·················· 105.7 Disassembly ······················································ 106. Exploded view ···················································· 11 - 12