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。
Carbon, Alloy or Stainless Steel, Pressure seal or Bolted Bonnet Provision for seal Welding on Bolted Bonnet Valves.
压力界限通过密封-楔板，阀体-阀帽连接和动负载填料腔来保证。
The pressure boundary is secured by a seal-welded body-bonnet joint and a live-loaded packing chamber.
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