对于要求气密性关闭的应用场合，可以指定美国太平洋高度完全关闭闸阀。这种防火安全阀门在上游和下游阀座提供气密性屏障关闭性能，消除了由于阀门泄漏造成产品污染或流体损失的可能。
　　For services that require bubble tight shutoff specify Pacific’s High Integrity Shutoff gate valves. These fire-safe valves provide a bubble tight barrier on both upstream and down stream seats and eliminate possible product contamination or loss of fluids due to valve leakage.
　　这种高完全关闭结构保留了美国太平洋标准API 600闸阀经过实践证明的可靠性和低维护性。通过一个护圈板将弹性密封锁在楔形闸板上。安装的特殊阀座环为弹性和金属楔形闸板阀座表面提供宽大的阀座表面。可提供适用于腐蚀性应用和温度高达232^oC的完整系列的阀内件材料和外壳材料，连接端口，管道和执行机构备选件。
　　The HIS construction retains the proven reliability and low maintenance of Pacific’s standard API-600 gate valve. A resilient seal is locked into the wedge by a retainer plate. Special seat rings are installed to provide a wide seating surface for both the elastomer and metal wedge seating surfaces. A full range of trim and shell materials, end connections, piping and actuator options are available for corrosive services and temperatures up to 450^oF.

(1) 实心蒙乃尔楔形闸板
(1) Solid Monel Wedge
(2) 蒙乃尔阀座环
(2) Monel Seat Ring
(3) 聚四氟乙烯弹性密封环
(3) PTFE Resilient Seal Ring
(4) K-蒙乃尔帽螺丝
(4) K-Monel Cap Screws
(5) 蒙乃尔压缩板
(5) Monel Compression Plate