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海北手動扇形眼鏡閥（盲板閥） Manual fan-shaped glasses valve(Blind flange valve) F43X、F343X-0.5/1/1.5
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海北電動眼鏡閥（盲板閥） Electric glasses valve (Blind flange valve) F943X-0.5/1/1.5
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海北電動圓形百葉式調(diào)節(jié)蝶閥 Electric round type shutter-like adjusting butterfly valve DBD-0.05
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海北電動矩形百葉式調(diào)節(jié)蝶閥Electric rectangle type shutter adjusting butterfly valve FDBD-0.05
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海北法蘭式通風(fēng)蝶閥Flange venting butterfly valve D41W、D341W、D641W、D941W
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海北伸縮蝶閥 Expansion butterfly valve SD341、SD343X/H/F
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海北雙偏心法蘭式、管網(wǎng)式蝶閥 Double eccentric flanged butterfly valve,pipeline butterfly valve D342X、D642X、D942X、GD342X
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海北API美標(biāo)凸耳式蝶閥 API Lug Type butterfly valve API 815L、830L Series
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海北API美標(biāo)蝶閥 API American standard butterfly valve API 815W、830W Series
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海北對焊式三偏心硬密封蝶閥 Butt-weld ends metal seated triple eccentric butterfly valve D363、D663、D963H/Y/W
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海北對夾式三偏心硬密封蝶閥 Wafer type metal seated triple eccentric butterfly valve D373、D673、D973H/Y/W
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海北法蘭式三偏心硬密封蝶閥 Flanged metal seated triple eccentric butterfly valve D343、D643、D943H/Y/W
