設計結構和特征

止(zhi)回(hui)閥的設計與制造符合MSSP-118和ASME B16.34.檢驗與測(ce)試(shi)按API 598,標(biao)記按MSS-SP-25.

采用以下結構

·全徑或縮徑 ·升降式(shi)止(zhi)回(hui)閥(fa)(fa) ·球(qiu)式(shi)止(zhi)回(hui)閥(fa)(fa)

·旋(xuan)啟式止回閥(fa) ·按需求內置彈簧

·螺栓連接、纏繞墊片密封式(shi)(shi)閥蓋，螺紋連接、全焊(han)密封式(shi)(shi)閥蓋以及螺紋連接內壓自緊式(shi)(shi)閥蓋

·整體式上(shang)密封(feng)座

·承插(cha)端(duan)符(fu)合ASME B16.11 ·螺(luo)紋連接(jie)端(duan)（NPT）符(fu)合ANSI/ASME B1.20.1 ·閥瓣可變換為節流型(xing)(xing)、針型(xing)(xing)、球型(xing)(xing)

承插(cha)焊鍛(duan)鋼止回閥(fa)(fa)(fa)有(you)三種(zhong)(zhong)閥(fa)(fa)(fa)蓋(gai)(gai)(gai)設(she)計(ji)形式(shi)(shi).*種(zhong)(zhong)是(shi)螺(luo)(luo)栓式(shi)(shi)閥(fa)(fa)(fa)蓋(gai)(gai)(gai),按(an)(an)這(zhe)種(zhong)(zhong)設(she)計(ji)形式(shi)(shi)設(she)計(ji)的(de)閥(fa)(fa)(fa)門(men)(men),其閥(fa)(fa)(fa)體(ti)與閥(fa)(fa)(fa)蓋(gai)(gai)(gai)用(yong)(yong)(yong)(yong)螺(luo)(luo)栓螺(luo)(luo)母(mu)連(lian)接,纏(chan)繞(rao)式(shi)(shi)墊片(pian)(316夾(jia)柔性石(shi)墨制造)密(mi)封.客戶有(you)特殊要(yao)(yao)求時也(ye)可(ke)采(cai)(cai)用(yong)(yong)(yong)(yong)金(jin)屬環連(lian)接.第二種(zhong)(zhong)設(she)計(ji)形式(shi)(shi)是(shi)焊接式(shi)(shi)閥(fa)(fa)(fa)蓋(gai)(gai)(gai),按(an)(an)這(zhe)種(zhong)(zhong)設(she)計(ji)形式(shi)(shi)的(de)閥(fa)(fa)(fa)門(men)(men),其閥(fa)(fa)(fa)體(ti)與閥(fa)(fa)(fa)蓋(gai)(gai)(gai)用(yong)(yong)(yong)(yong)螺(luo)(luo)紋連(lian)接,全焊密(mi)封.客戶有(you)特殊要(yao)(yao)求時也(ye)可(ke)采(cai)(cai)用(yong)(yong)(yong)(yong)透焊連(lian)接.第三種(zhong)(zhong)是(shi)壓(ya)力自(zi)緊式(shi)(shi)閥(fa)(fa)(fa)蓋(gai)(gai)(gai),按(an)(an)這(zhe)種(zhong)(zhong)設(she)計(ji)形式(shi)(shi)設(she)計(ji)的(de)閥(fa)(fa)(fa)門(men)(men),其閥(fa)(fa)(fa)體(ti)與閥(fa)(fa)(fa)蓋(gai)(gai)(gai)用(yong)(yong)(yong)(yong)螺(luo)(luo)紋連(lian)接,內壓(ya)自(zi)密(mi)環密(mi)封.