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方泰锻钢截止阀有三种体盖连接设计形式，第一种是体改螺栓连接，按这种连接设计形式设计的阀门，其阀体与阀盖用螺栓连接，缠绕式垫片密封，优点是便于维修。第二种是体盖焊接连接，按这种连接形式设计的阀门，其阀体与阀盖全焊密封，优点是无外泄漏。第三种是压力自紧式阀盖，按这种连接设计形式设计的阀站，其阀体与阀盖用螺纹连接，内压自密封环密封，优点是内部压力越大，其密封性能越好。
Taitong forged steel globe valve has three types of bonnet.One is bolted,which the body is connected with bonnet by bolts and sealed by spiral gasket with advantanges of conveient maintenance;one is welded bonnet,which the body is fully welded with sealing bonnet of no leakege;another is pressure-in bonnet,which the body is screwed into the bonnet and seled by inner pressure-in ring with better sealing ability for higher pressure
设计结构与特征
1、设计制造：按ANSI B16.34;API602;BS5352
2、连接端尺寸：1）承插孔尺寸按ANSI B16.11;JIS B2306 2)螺纹端尺寸按ANSI B1.20.1 BS21;ISO7/1;JIS B0203
3、阀门检验和试验：按API598
4、材料：按AISI/ASTM的规定
5、主体材料：A105;F5;F11;F22;304;304L;316;316L;LF2...
6、标记按MSS-SP-25
Design sturcture and feature
1.Design and manufacture:ANSI B16.11;API602;BS5352
2.Ends connection:1)SW dimension:ANSI B16.11;JIS B2306 2)Screwed dimension:ANSI B1.20.1 BS21;ISO7/1;JIS B0203
3.Valve inspection and test:API 598
4.Material according to AISI/ASTM
5.Body material:A105;F5;F11;F22;304;304L;316;316L;LF2...
6.Mark:MSS-SP-25
结构和特征
1、全径或缩径
2、明杆支架式
3、自定心压板压套式
4、螺栓连接、全焊密封连接以及内压自紧式连接阀盖
5、整体式上密封座
6.阀瓣可变换为节流型、针型、球型 和止回型
Structure and feature
1.Full bore or reduced bore
2.Outside screwed and yoke
3.Bushing type
4.Bolted,fully welded and pressure-in bonnet
5.Integral backseat
6.Disc changeable for choke type,needle type,ball type and check valve | 
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