主要型号有：全衬里H44F46与H74F46单瓣旋启式系列和H76F46型双瓣旋启式系列，它们的结构形式为：阀瓣都是围绕阀座外的（销）轴、镶嵌在阀体与阀盖之间形成的特殊凹槽内、启闭灵活，密封可靠，另外，H72F46和H76F46型止回阀的特点是：除了阀体，阀瓣外，复位弹簧也全部包衬了耐腐蚀的氟塑料，设计合理的弹簧，使阀瓣在低压区内也能产生足够的密封比压，保证阀门在低压力区密封的可靠性。2.升降立式止回阀主要型号有全衬里H40F46型，H42F46和H72F46升降立式止回阀，其中H40F46是一种新型结构，阀瓣为半球型，它们共同特点是衬氟阀瓣沿阀体通路轴线做升降运动。3.升降式止回阀主要型号有：全衬里H41F46直通升降式止回阀，其结构特点是：衬氟阀瓣垂直于阀体进、出口轴线作升降运动。设计规范遵循GB13932/GB122235/GB12236/JB/T8937/APl594标准.性能规范设计规范结构长度连接法兰实验与检验产品标识供货规范GB/T12235(GB/T12236)GB/T12221JB/T78;JB/T79GB/T13927GB/T12220JB/T7928主要零件材料序号零件名称灰铸铁铸钢不锈耐酸铸钢超低碳不锈耐酸铸钢ZCPRPLRL1阀体/端盖HT250WCBCF8CF8MCF3CF3M2阀瓣/阀杆351Cr131Cr18Ni91Cr18Ni12Mo2Ti00Cr18Ni1000Cr17Ni14Mo23衬里/阀座PTFE（F4）、PCTFE（F3）、FEP（F46）、PFA（可溶性F4）4紧固螺母351Cr17Ni21Cr18Ni9Ti5螺母450Cr18Ni90Cr18Ni9主要外形连接尺寸（mm）公称通径标准值参考值DN(mm)NPS(inch)LDD1D2fbZ-φdBHWT(Kg)PN0.6MPa151/21308055402124-φ12105554203/41509065502144-φ1211558525116010075602144-φ121286063211/418012090702164-φ141457574011/2200130100803164-φ14160828502230140110903164-φ1417895106521/22901601301103164-φ14205105208033101851501253184-φ182301202510043502051701453184-φ182551353012554002352001753208-φ183051585015064802602252003208-φ183451806520084953152802553228-φ184152151372501062237033531032412-φ184902401503001269843539536242412-φ235402651853501478748544541242612-φ235853002154001691453549546242816-φ236353602444501897859055051842816-φ236803852765002097864060056843016-φ23740415315PN1.0MPa151/21309565452144-φ14105555203/415010575552164-φ1411558725116011585652164-φ141286093211/4180135100782184-φ1814575114011/2200145110853184-φ181608213.55022301601251003204-φ1817895186521/22901801451203204-φ18205105228033101951601353224-φ182301202810043502151801553228-φ182551353412554002452101853248-φ183051585815064802802402103248-φ233451807220084953352952653268-φ234152151502501062239035032032812-φ234902401653001269840040036842812-φ235402651903501478746046042843016-φ235853002254001691451551548243216-φ256353602544501897856556553243220-φ256803852855002097862062058543420-φ25740415333PN1.6MPa151/21309565452144-φ14110556203/415010575552164-φ14120587.825116011585652164-φ1413560103211/4180135100782184-φ181507512.54011/2200145110853184-φ181658214.55022301601251003204-φ181859519.56521/22901801451203204-φ1821010525.58033101951601353224-φ182351203010043502151801553248-φ182601353612554002452101853268-φ183101586215064802802402103288-φ2335018078200849533529526533012-φ234202151562501062240535532033212-φ255052401723001269846041037543412-φ255602652403501478752047043543816-φ256053002084001691458052548544016-φ30650350265浙江沪科阀门有限公司手机：吕工13738370398(同微信)邮箱：13738370398@QQ:253381360网址)