PDF《Operation 减压阀的选择、安装和操作》

350 to

500 psig. By adjusting the control knob, the second stage reduces the intermediate pressure to the desired delivery pressure. 两级减压器的运转同两个单级减压器串联是一样的.第一级把入口的压力降到预定的中间压力, 该压力典型值为350到500 psig.通过调整控制钮,第二级把中间压力降到需要的输出压力. Like the single-stage regulator, outlet pressure from the first stage of the two-stage regulator rises as cylinder pressure decreases. However, instead of passing out of the regulator, the gas flows into the second stage where the pressure is moderated. Thus, delivery pressure remains constant even as cylinder pressure decays, eliminating the need for frequent control knob adjustment. 同单级减压器一样,两级减压器的第一级的出口压力随钢瓶压力的降低而升高.但是,气体不是 排出减压器,而是流入第二级并得到缓和.因此,即使钢瓶压力下降,减压器的输出压力保持恒 定,从而不需要经常调整控制钮. Selecting the Proper Regulator 选择合适的减压器 Line and Cylinder Regulators 管道和钢瓶减压器 Line regulators are typically point-of-use regulators serving low-pressure pipelines. They are also used in conjunction with high-pressure cylinder regulators that limit the inlet pressure to

250 to

400 psig. 管道调整器是典型的用于低压管道的调整器.它们还和把入口压力限制在250到400 psig之间 的高压钢瓶调整器联合使用. Cylinder regulators are available in either single-stage or two-stage models for high-purity, general purpose, or special service applications. 钢瓶调整器既有单级的又有两级的,可以用于高纯度、通用或者特殊设施应用. High-Purity Regulators 高纯度减压器 High-purity regulators are designed and constructed to provide diffusion resistance and easy cleanup. Metal diaphragms and high purity seats and seals minimize or eliminate outgassing and inboard diffusion. 高纯度调整器设计和制造得能够提供扩散阻力和容易净化. 金属隔膜和高纯度座和密封将漏气和 内部扩散减到了最小或彻底消除. General Purpose Regulators 通用减压器 General purpose regulators are designed for economy and longevity. They are recommended for noncorrosive general plant, pilot plant, and maintenance shop applications where diffusion resistance is not required. 通用调整器设计得既经济又寿命长. 推荐用于对扩散阻力没有要求的无腐蚀性的一般工厂、 试验 工场和维修厂. Regulators for Oxidizers 用于氧化剂的减压器 Because oxidizers change the chemistry of fire, a material that does not burn in air may ignite or react violently in an oxidizer atmosphere. Equipment used in oxidizer service should be selected with materials of construction that minimize the probability of ignition and the risk of fire or explosion. This equipment must be cleaned to remove any contaminants such as oils or grease. Care must also be taken to eliminate any residual cleaning agents. Regulators used in oxygen service should be maintained exclusively in oxidizer service. If a regulator is used in other types of service, it may no longer meet oxidizer clean requirements. 由于氧化剂改变了起火的化学性质, 在空气中不能燃烧的材料在氧化剂气氛中可能能够点燃或剧 烈反应. 用于氧化剂设施的设备应选用能够最大程度减小点燃的可能性和起火或爆炸的危险的建 材.必须清洁系统,以去除任何污染物,如油或润滑脂.还要注意去除任何残留的清洁剂.用在 氧设施里的调整器应该一直用在氧化剂设施里. 如果调整器用于其它类型设施, 它可能不再满足 氧化剂清洁的要求. Special Service Regulators 特殊设施减压器 Special service regulators are specifically constructed for special applications including oxygen, acetylene, and fluorine service and high-pressure, ultra-high-pressure, and corrosion service. 特殊设施调整器是特殊制造的,用于特殊的应用,包括氧、乙炔和氟设施和高压、超高压和腐蚀 性设施. To make your selection easier, consult Air Products'