铲运机继电器二次阀 scraper relay secondary valve
二次空气转流阀 [动力] secondary air diverter valve
二次空气旁通阀 secondary air bypass valve ; sabvsecondary air bypass valve ; SABV
二次空气电磁阀 secondary-air-solenoid
二次控制阀组件配置 secondary control valve group location
二次控制阀 secondary control valve
二次空气吸入阀 air suction valve
二次控制阀组件 secondary control valve group
由于采用了双阀孔结构设计，在最大压差下排放凝结水的同时，还有一个为二次蒸汽系统设计的预设压差系统在工作。
Because of the dual-orifice design, there is a preset controlled pressure differential for the secondary steam system, while maximum pressure differential is available to discharge the condensate.
例如为了防止二次污染，即使是排污阀也不采用含石棉的密封填料和垫片。
For example, in order to prevent secondary pollution, even the use of sewage is not Valve asbestos packing and gasket sealing.
主要原因是锅炉安全阀二次保护回路设计有缺陷，再加上安全阀起跳和回座的整定值与运行额定值相重叠造成的。
The main reasons were due to the defect in the design of safety valve secondary circuit and the overlap of the service rating and the setting for safety valve popping and reseating.
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