零件名称
材料阀体铸铁、不锈钢、铬钼钢、合金钢蝶板铸钢、合金钢、不锈钢、铬钼钢密封圈不锈钢与耐高温石棉板组合成多层次阀杆2cr13、1cr13不锈钢、铬钼钢轴承奥氏体不锈钢、304氮化填料柔性石墨
三偏心特点及原理
1、偏离管道中心
2、偏离密封面中心
3、倾斜的锥形
当阀门开启时，蝶板与阀座在关闭时瞬间接触，利用蝶板偏心1、偏心2迅速脱离阀座，降低了密封副的磨损，磨擦力矩小，开启灵活。偏心锥面3，使阀门在开启或关闭时蝶板能通过阀座内孔，实现接触密封。另外，锥形蝶板的旋转半径大于密封副接触位置的旋转半径，故蝶板在阀门关闭时将出现越关越紧，能够实现自锁，防止蝶板过位。
外形尺寸dd373hdd673h-6/10c.p.r.v系列对夹式多层次金属硬密封蝶阀dd973h
公称通径
长度
标准值外形尺寸
（参考值)连接尺寸
(标准值)重量
(kg)hdd373hdd673hdd973hpn0.6mpapn1.0mpa毫米英寸lh1a1b1h2a2b2h3a3b3d1z-dd1z-d502431123505725302502551104-141254-18126521/2461153705725302502551304-141454-03805725652502551504-181608-384205926002502551704-181808-644605926402502552008-182108-75555270280800355927053003152258-182408-2229200889285025052808-182958-2245250101425925250533512-1835012-22693001215601035450220107030031539512-2240012-2286350045056010704502201512-2246016-22122400053558011030031549516-2251516-26350128053558012506502805016-2256520-263802906502800020-2262020-26260600247066060565681070520-2672520-30380700285055084465681081024-2684024-304508003250550204065681092024-3095024-336509003620359596512503802255785863102024-30105028-33830100040207502080785863112028-30116028-36105012004825477522801000925225012503802640785863-3979870245010009252886156036-36159036-420009253156176040-36182040-48290010302011009803421197044-39202044-48400020008040612503270110098036852-485300
dd373hdd673h-16/25c.p.r.v系列对夹式多层次金属硬密封蝶阀dd973h
公称通径
长度
标准值外形尺寸
（参考值）连接尺寸
(标准值)重量
(kg)hdd373hdd673hdd973hpn1.6mpapn2.5mpa毫米英寸lh1a1b1h2a2b2h3a3b3d1z-dd1z-d502431123505725302502551254-181254-18126521/2461153705725302502551454-181458-03805725652502551608-181608-384205926002502551808-181908-224605926402502552108-182208-26275270280800355927053003152408-222508-26292008892850250529512-2231012-2645250101425925250535512-2637012-30693001215601035450220107030031541012-2643016-3086350045056010704502201016-2649016-33122400053558011030031552516-3055016-36350128053558012506502808520-3060020-363801365