一、旋启式衬胶止回阀简介止回阀是一种依靠介质本身的流动而自动启、闭阀瓣用来阻止介质逆向流动的自动阀门。二、旋启式衬胶止回阀技术规范遵循规范STANDARD设计与制造GB/T12235、GB/T12236结构长度GB/T12221、JB/T96法兰尺寸JB/T78、JB/T79压力试验GB/T13927标志GB/T12220供货GB/T12252三、旋启式衬胶止回阀特点1、法兰连接止回阀2、设计与制造符合中国国家标准3、基本结构形成：旋启式，直通升降式4、公称压力：PN1.0~1.6（MPa）5、公称通径：DN15~500（mm）6、基本型号：H41F3、H41F46、H44F3、H44F4四、旋启式衬胶止回阀连接尺寸公称通径标准值参考值DN（mm）NPS（inch）L1DD1D2fbZ-ΦdDoHWT（Kg）PN0.6Pa151/21308055402124-Φ12105554203/41509065502144-Φ1211558525116010075602144-Φ121286063211/418012090702164-Φ141457574011/2200130100803164-Φ14160828502230140110903164-Φ1417895106521/22901601301103164-Φ14205105208033101851501253184-Φ182301202510043502051701453184-Φ182551353012554002352001753208-Φ183051585015064802602252003208-Φ183451806520084953152802553228-Φ184152151372501060037033531032412-Φ18490240150公称通径标准值参考值DN（mm）NPS（inch）L1DD1D2fbZ-ΦdBHWT（Kg）PN1.0MPa151/21309565452144-Φ14105555203/415010575552164-Φ1411558725116011585652164-Φ141286093211/4180135100782184-Φ1814575114011/2200145110853184-Φ181608213.55022301601251003204-Φ1817895186521/22901801451203204-Φ18205105228033101951601353224-Φ182301202810043502151801553228-Φ182551353412554002452101853248-Φ183051585815064802802402103248-Φ233451807220084953352952653268-Φ234152151502501062239035032032812-Φ23490240165PN1.6MPa151/2130956545214110556203/41501057555216120587.8251160115856521613560103211/4180135100782181507512.54011/2200145110853181658214.55022301601251003201859519.56521/229018014512032021010525.580331019516013532223512030100435021518015532426013536125540024521018532631015862150648028024021032835018078200849533529526533042021515625010600405355320332505240172)