SMC单向阀/带快换接头的单向阀为圆桶状阀体，其内部主要含有乙组不锈钢球(STAINLESS STEEL BALL)，杆(FLOAT ARM)及塞(POPPET)。本阀装设于泵浦出水口处或送配水管线中，用以大量排除管中集结之空气，或于管线较高处集结之微量空气排放至大气中，以提高管线及抽水机使用效率，且于管内一旦有负压产生时，此阀迅速吸入外界空气，以保护管线因负压所生产之毁损。操作原理：当管内开始注水时，塞头停留在开启位置，进行大量排气，当空气排完时，阀内积水，浮球被浮起，传动塞头至关闭位置，停止大量排气，当管内水正常输送时，如有小量空气聚集在阀内到相当程度，阀内水位下降，浮球随之下降，此时空气由小孔排出，当抽水机停止，管内水流空时或遇管内产生负压时，此时塞头迅速开启，吸入空气，确保管线*.
日本smc,SMC消声器
AS2001F-06AS2210-02AS3001F-08KAS3311F-U03-08ASP630F-04-13S
AS2001F-06-3AS2210-02-SAS3001F-08TAS3311F-U03-10ASP630F-F04-10S
AS2001F-06DAS2210-F02AS3001F-08-X12AS3311F-U03-12ASP630F-F04-12S
AS2001F-06KAS2210F-02-08SAS3001F-08-X214AS3500-02ASP630F-N04-13S
AS2001F-06K-X264AS2210M-01-SAS3001F-09KAS3500-02-2ASQ100-01
AS2001F-06NAS2210M-02AS3001F-10AS3500-03ASQ430F-02-06S
AS2001F-06TAS2210M-02-SAS3001F-10-3AS4000-02ASQ430F-02-06S-F20
AS2001F-06-X12AS2211-01-F06AS3001F-10DAS4000-02BASQ430F-02-08S
AS2001F-06-X214AS2211-01-F06SAS3001F-10KAS4000-02-HASQ530F-02-06S
AS2001F-06-X36AS2211-01-F08SAS3001F-10K-X264AS4000-02-LASQ530F-02-06S-F20
AS2001F-07AS2211-01-F08SKAS3001F-10NAS4000-02-X1ASQ530F-03-08S
AS2001F-07KAS2211-02-F06SAS3001F-10TAS4000-03ASQ630F-03-12S
AS2001FG-04AS2211-02-F08SAS3001F-10-X242AS4000-03-3ASR100-01
AS2001FG-06AS2211F-01-04AS3001F-11AS4000-03-LASR300-03
日本smc,SMC消声器
AS2001FM-04AS2211F-01-04SAS3001F-12AS4000-03-X100ASR430F-02-06S
AS2001FM-06AS2211F-01-04SKAS3001F-12-3AS4000-03-X221ASR430F-02-08S
AS2001FM-07AS2211F-01-06AS3001F-12DAS4000-03-X48ASR430F-02-10S
AS2010P-06-06AS2211F-01-06KAS3001F-12KAS4000-04ASR530F-02-08S
AS2050F-04AS2211F-01-06SAS3001F-12K-X264AS4000-04ASR530F-03-08S
AS2050F-06AS2211F-01-06SDAS3001F-12NAS4000-04-HASR630F-03-12S
AS2050F-08AS2211F-01-06STAS3001FG-08AS4000-04NPTASR630F-04-10S
AS2051F-06AS2211F-01-06S-X242AS3001FG-10AS4000-04-X100ASS100-01
AS2051F-06-3AS2211F-01-07SAS3200-02AS400-02-6ASS100-01B
AS2051F-06KAS2211F-01-08AS3200-02-SAS4000E-02ASS110-01
AS2051F-07AS2211F-01-08SAS3200-03AS4000E-03ASS110-01B
AS2051F-07KAS2211F-01-08-SAS3200-03-12SAS4000E-04ASS300-02
AS2051F-07NAS2211F-01-08SDAS3200-03SAS4000-F03ASS300-02B
AS2051F-08AS2211F-01-08SKAS3200-03-SAS4000-F04ASS300-03
AS2051F-08-3AS2211F-01-08STAS3200-03-SDAS4000F-12ASS300-03B
AS2051F-08DAS2211F-01-10AS3200-03-SKAS4000F-12ASS300-F03B
AS2051F-08KAS2211F-01-10SAS3200-03-SNAS4000-N02ASS300-N02
AS2051F-08K-X264AS2211F-01-10SKAS3200F-02-10AS4000-N04ASS310-02
AS2051F-08TAS2211F-02-04AS3200-F03AS4001F-10ASS310-02B
AS2051F-08-X214AS2211F-02-04SAS3200F-03AS4001F-10-3ASS310-03
AS2051FG-06AS2211F-02-04-SAS3200F-03-06AS4001F-10DASS310-03B
AS2051FG-08AS2211F-02-05SAS3200-N03AS4001F-10KASS310-N03B
AS2051FM-06AS2211F-02-06AS3200-N03-DAS4001F-10TASS500-04
AS2051FM-08AS2211F-02-06KAS3200-N03-SDAS4001F-11ASS500-04B
AS2110F-01-06AS2211F-02-06SAS3201-03-F08SAS4001F-12ASS500-06
AS2110F-01-06SAS2211F-02-06-SAS3201-03-F08SNAS4001F-12-3ASS600-10
AS2200-01-SAS2211F-02-06SKAS3201-03-F10AS4001F-12DASV120F-M3-04
AS2200-01-SKAS2211F-02-06SNAS3201-03-F10SAS4001F-12KASV220F-M5-04
AS2200-02AS2211F-02-06STAS3201-03-F10SKAS4001F-12NASV220F-M5-06
AS2200-02SAS2211F-02-06S-X242AS3201F-02-06AS4001F-12TASV220F-M5-06K
AS2200-02-SAS2211F-02-06S-X36AS3201F-02-06SAS4001FG-10ASV310F-01-06
AS2200-02-SDAS2211F-02-06-X242AS3201F-02-06SDAS4200-03-SDASV310F-01-06S
AS2200-02-SKAS2211F-02-06-X36AS3201F-02-06SNAS4200-04ASV310F-01-06SK
AS2200F-01-04-SAS2211F-02-08AS3201F-02-07SAS4200-04-SASV310F-01-08S
AS2200-F02AS2211F-02-08SAS3201F-02-08AS4200-04-SDASV310F-02-06S
AS2200M-01-SAS2211F-02-08SDAS3201F-02-08SAS420-02ASV310F-02-06SK
AS2200M-02AS2211F-02-08W2AS3201F-02-08SDAS420-02-LASV310F-02-08
AS2200M-02-SAS2211F-02-10AS3201F-02-08SKAS420-03ASV310F-02-08S
AS2200M-02-X214AS2211F-02-10SAS3201F-02-08SNAS420-03-LASV310F-02-08SK
AS2200-N01AS2211F-02-10-SAS3201F-02-08STAS420-04ASV410F-01-08S
AS2200-N01-SAS2211F-02-10SKAS3201F-02-08S-X242AS420-04-6-LASV410F-01-10S
AS2200-N02AS2211F-02-10STAS3201F-02-08W2AS420-04-LASV410F-02-08S
AS2200-N02-SDAS2211F-02-10W2AS3201F-02-08W2AS4200-F04ASV410F-02-10S
AS2201-01-F06AS2211FE-01-06SKAS3201F-02-08-X214AS4200F-04-10SASV410F-03-08S
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