電磁閥*，美國ASCO階段控制關(guān)閉蝶閥、具有子母閥板的水力控制閥、緩閉止回閥等，使閥門延遲關(guān)閉，部分水通過泵與轉(zhuǎn)子部件回流以達(dá)到泄壓消除水錘壓力的目的。但由于泄壓時間較長，回流的水長時間沖擊泵的葉輪，使泵轉(zhuǎn)子部件反轉(zhuǎn)速度加快，時間長會損壞泵轉(zhuǎn)子部件及與之相聯(lián)的電機(jī)轉(zhuǎn)子部件。

     內(nèi)有液壓傳動桿、下閥板、上閥板，液壓傳動桿兩端帶有螺紋。閥體下部通過聯(lián)接螺釘與底蓋聯(lián)接，閥體上下兩側(cè)各有一個進(jìn)出水口與管道聯(lián)接，閥體內(nèi)中部靠近上進(jìn)出水口處有密封座，上閥板通過焊接與液壓傳動桿聯(lián)接，下閥板通過螺母、液壓傳動桿一端的螺紋與液壓傳動桿聯(lián)接，閥體上部通過法蘭與液壓腔聯(lián)接。

電磁閥*，美國ASCO

19200001     8210G13       8321G1       EF8300D61U
SCG531B001MS 8262G80M0     EF8320G188   EF8342C1
43550447     55192009      55192011     EV8316G82
8210G037     SCXG327A001   EF8210G088   EF8342G3MS
SCG353A047   SCG353A051    8320G10      NB327A001
8215G2       8342G703      SCB307B065F  SCG553A005MS
NFB307B065   WT8511A1MS    HT8316G66    EF8342G1MS
K303116      HB8316G074    HB8320G174   13100199
88100144     35500076      54191023     54291023
8266D26V     55192011      HB8316D15VMB HB8316G16VMB
8210G94      8320G83       54190883     SCE238A009
EF8320G200   8210G15       8316G64      8342G001
8210G009     EF8300D61     NFB307C79    SCXB307B075
12500001     8210G88       EF8327G42    EV8316G84V 
NFB307B05F   NF8327B001    NFB327A002   NFB307078
NFB307021    NFB307C79     10700208     8210G88
55100004     55102005      55102011     EF8300D61U
43004158     52100008      SCG353A047   EF8342G1
55100004     EF8316G304    EF8344G374   8320G182V
52000004     EV8316G38V   JBEF8210G088  JBEF8210G089

EF8320G174   EV8327G52     EV855G455    18900001
35500382     54191006      EF8344G70    8344G72
NFG551B402MS 8210G2        54190017     13100156
EFHC8210G11  EFHC8210G13   EFHC8210G3   8290AO34
WBIS8314A300MO 88100142    EV8316G384V  8210G95
8342G001     WPTISB307A406 V8316G384V   EFG551G417MO 
NFB551B401   EF8320G18     54100883     55102005
55102009     55102011      EF8300D61U   43004422
U8325B39V    SCE238A007    43004166     NFB316A54
55192005     E238A207      34207093     EF8025B224
HT8316G074   12100309      34203086     8345G1