...型——Butt-Welding 对焊端短型连接 NPT——NPT螺纹连接 WAFER——对夹式连接 3.2阀盖连接形式 a) 螺栓连接阀盖（Bonnet Bolted 简称B.B.
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bolted bonnet 栓接阀门阀盖 ; 螺栓毗连的阀盖
Bolted bonnet BB 螺栓连接的阀盖
BB Bolted Bonnet 螺栓连接阀盖
bolted bonnet valve 螺栓阀帽阀
Our bolted bonnet design is simple to disassemble, easy to maintain. For example, our unique threaded seat rings are easily accessible for repair or replacement.
我们的螺栓阀盖结构使得拆卸简单化，维护容易。例如，我们独特的螺纹阀座环易于接近进行维修或更换。
Velan now offers standard cast steel bolted bonnet gate and globe valves qualification tested for compliance with EPA fugitive emissions regulations.
我们现在能够提供标准铸钢螺栓阀帽闸阀和截止阀，这些阀门都通过符合EPA短时排放规定要求的鉴定测试。
Carbon, Alloy or Stainless Steel, Pressure seal or Bolted Bonnet Provision for seal Welding on Bolted Bonnet Valves.
碳钢，合金钢或不锈钢，压力密封或螺栓阀帽用于焊接在螺栓阀帽阀门上阀座的设备。
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