H21W,H44W,H41W,H42W,H71W,H76W,H74W不銹鋼法蘭止回閥的款式分析一，H21W-160P,H21W-64P,H21W-250P,H21W-400P外螺紋止回閥

H21W,H44W,H41W,H42W,H71W,H76W,H74W不銹鋼法蘭止回閥的款式分析二，H41W-16P,升降式法蘭止回閥

H21W,H44W,H41W,H42W,H71W,H76W,H74W不銹鋼法蘭止回閥的款式分析三，H44W-16P,旋啟式法蘭止回閥，大口徑旋板式止回閥，擋板式大口徑止回閥，搖板式大口徑法蘭止回閥，單向閥

H21W,H44W,H41W,H42W,H71W,H76W,H74W不銹鋼法蘭止回閥的款式分析四，H42W-16P，立式止回閥，立式法蘭單向閥

H21W,H44W,H41W,H42W,H71W,H76W,H74W不銹鋼法蘭止回閥的款式分析五，H71W-25P，對夾式止回閥，對夾式單向閥

H21W,H44W,H41W,H42W,H71W,H76W,H74W不銹鋼法蘭止回閥的款式分析六，H76W-16P,雙閥板蝶式對夾式止回閥

H21W,H44W,H41W,H42W,H71W,H76W,H74W不銹鋼法蘭止回閥的款式分析七，H74W-16P,DN1200,大口徑單板式對夾式止回閥，大口徑單擋板式對夾式單向閥

H21W,H44W,H41W,H42W,H71W,H76W,H74W不銹鋼法蘭止回閥的款式分析八，H11W-16P,內(nèi)螺紋止回閥，內(nèi)絲單向閥，蝶式內(nèi)螺紋止回閥