... Materials of main parts HT200,QT450,WCB Pressure levelsAWWA C504 25B,50B,75B,150B Applicable temperature -20°C~150°CTest&inspection ... maintenance, replacement;3.30 "72 "eccentric structure, equipped with overflow valve disc way, can obtain higher intensity, light weight, the more ... specifications disc seal face for stainless steel, can reduce the valve shut up torque and longer service life.5. Through ...