武穴黎翔機電設(shè)備有限公司，詢價：何琴

詢價：，    

詢價

詢價: 781992875.736567721,704552157 

詢價：781992875,lxjd,

阿里巴巴店鋪：（支持網(wǎng)上訂購）

當主流出口壓力超過額定值時, 由于主閥進出口壓差改變及彈簧的作用, 閥瓣從上到下運動直至關(guān)閉, 同時帶動撥桿左端下降, 右端上升, 針閥開啟, 打開流道B。D 腔內(nèi)的介質(zhì)經(jīng)流道B 流向旁通出口。由于節(jié)流活塞C 腔受力比D 腔大, 故節(jié)流活塞左移, 打開流道A。此時介質(zhì)通過流道A , 經(jīng)多級正反螺旋槽減壓后回流到高壓離心水泵的入口, 保證水泵正常運轉(zhuǎn)。
4 類型 

目前鋼廠、電廠和化工廠等采用的自動循環(huán)泵保護閥主要為美國的YAWAY和HBE 公司及德國的SCHROEDAH 和HORA 公司產(chǎn)品。4 家公司的 

產(chǎn)品基本上采用了同類型結(jié)構(gòu), 即主閥為彈簧加載的升降式止回閥, 副閥為帶有減壓機構(gòu)的節(jié)流閥。按壓力級基本上分為兩類, 低壓型（150～300 磅級） 和高壓型（600～2500 磅級） 。低壓型和高壓型的主閥結(jié)構(gòu)都是一樣的, 不同的是旁通副閥的減壓機構(gòu)形式, 低壓型主要采用節(jié)流孔板式減壓（圖5） , 高壓型則采用多級溝槽式減壓（圖6） 。

SDV10 1B6B 1CSDV10 1B1B 1A
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SDV10 1B2B 1A
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SDV10 1B3B 1A
SDV10 1B3B 1B
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SDV10 1B4B 1A
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SDV10 1B5B 1A
SDV10 1B5B 1A L
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SDV10 1B6B 1A
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F3 SDV10 1P2P 1A
F3 SDV10 1P7P 1A
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SDV10 1B1B 11C
SDV10 1B1B 11C L
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SDV10 1B2B 11A L
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SDV10 1B5B 11A
SDV10 1B5B 11B L
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SDV10 1P2P 11A
SDV10 1P4P 11A
SDV10 1P4P 11AL
SDV10 1P4P 11C
SDV10 1P5P 11A L
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SDV10 1S2S 11A L
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SDV10 1S3S 11C L
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SDV10-1S1S-11A
SDV10 1B5B 38A
SDV10-1B4B-38A
SDV10-1B6B-38A
SDV10 1P3P 38CL
SDV10 1P5P 38C
SDV10 1P7P 38A
SDV10 1S6P 38C
SDV10 1S3S 38D
SDV10 1S4S 38C
SDV10 1S5S 38A
SDV10 1S7S 38CL
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F3 SDV20 1P11P 1A
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SDV20 1P11P 1A
SDV20 1P11P 1B
SDV20 1P11P 1C
SDV20 1P11P 1D
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SDV20 1S6P 1A
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SDV20 1S10S 1D L
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SDV20 1S11S 1B
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SDV20 1P11P 11A
SDV20 1P12P11C
SDV20 1P13P 11C
SDV20 1P8P 11A
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SDV20 1B7B 38A
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SDV20 1P11P 38A
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SDV20 1P13P 38C
SDV20 1P13P 38L
SDV20 1P6P 38C
SDV20 1P8P 38C
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SDV20 1S10S 62A
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SDV2010 1F11B2B 1AA
SDV2010 1F11B4B 1AA
SDV2010 1F11B4B 1BB
SDV2010 1F11B5B1AA
SDV2010 1F11B7B 1AA
SDV2010 1F11B7B 1CC L
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SDV2010 1F13B4B 1AA
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SDV2010 1F8P4P 1AA
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SDV2010 1F9P3P 1AA
SDV2010 1F9P3P 1DB
SDV2010 1F9P4P 1AA
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SDV2010 1F10S2S 1AA
SDV2010 1F10S2S 1CC
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SDV2010 1F11S4S 1AA
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SDV2010 1F12S3S 1CC
SDV2010 1F13S1S 1AA
SDV2010 1F13S2S 1AA
SDV2010 1F13S2S 1CC
SDV2010 1F13S3S 1CC
SDV2010 1F13S4S 1AA
SDV2010 1F13S5S 1CC L
SDV2010 1F13S6S 1AA
SDV2010 1F6S2S 1AA
SDV2010 1F6S2S 1CC
SDV2010 1F6S4S 1AA
SDV2010 1F6S4S 1CC
SDV2010 1F7S2S 1AA
SDV2010 1F7S2S 1CC
SDV2010 1F7S3S 1AA
SDV2010 1F7S3S 1CC
SDV2010 1F7S4S 1CC
SDV2010 1F7S4S 1CC L
SDV2010 1F7S5S 1DA
SDV2010 1F7S6S 1AA
SDV2010 1F8S2S 1BAL
SDV2010 1F8S2S 1CC
SDV2010 1F8S3S 1AA
SDV2010 1F8S3S 1CC
SDV2010 1F8S4S 1AA
SDV2010 1F8S5S 1AA
SDV2010 1F9S2S 1CC
SDV2010 1F9S3S 1AA
SDV2010 1F9S3S 1AAL
SDV2010 1F9S3S 1AC
SDV2010 1F9S3S 1BA L
SDV2010 1F9S3S 1CC
SDV2010 1F9S3S 1CC L
SDV2010 1F9S4S 1CC
SDV2010 1F9S5S 1AD L
SDV2010 1F9S5S 1DA
SDV2010 1F9S6S 1AA
SDV2010 1F9S7S 1CC
SDV2010 1F13B2B 11AA L
SDV2010 1F8B2B 11AB
SDV2010 1F11P5P 11AA
SDV2010 1F11S5S 11AA
SDV2010 1F11S7S 11AA
SDV2010 1F12S4S 11AA
SDV2010 1F12S4S 11AA L
SDV2010 1F13S2S 11CC
SDV2010 1F13S6S 11CC
SDV2010 1F6S3S 11CC
SDV2010 1F7S3S 11CB
SDV2010 1F8S3S 11CB
SDV2010 1F8S4S 11AA
SDV2020 1F 13B11B 1CCL
SDV2020 1F 13B11B 1M AA L
SDV2020 1F11B7B 1CC
SDV2020 1F12B8B 1AA
SDV2020 1F13B7B 1AA
SDV2020 1F6B6B 1AA
SDV2020 1F7B7B 1BB
SDV2020 1F7B7B 1CC
SDV2020 1F13P7P 1AA
SDV2020 1F11S11S 1AA
SDV2020 1F11S11S 1CC
SDV2020 1F11S11S 1CDL
SDV2020 1F11S6S 1AA
SDV2020 1F11S6S 1CC
SDV2020 1F11S8S 1AA
SDV2020 1F11S9S 1AA
SDV2020 1F12S11S 1AA L
SDV2020 1F12S8S 1AA
SDV2020 1F13S11S 1A
SDV2020 1F13S11S 1CC
SDV2020 1F13S8S 1CC L
SDV2020 1F13S9S 1AA
SDV2020 1F7S6S 1AA
SDV2020 1F7S7S 1CC
SDV2020 1F8S6S 1CC
SDV2020 1F8S8S 1AA
SDV2020 1F8S8S 1CC
SDV2020 1F8S8S 1DD
SDV2020 1F9S6S 1CC
SDV2020 1F9S7S 1AA
SDV2020 1F9S9S 1CC
SDV2020 1F10S9S 11CC L
SDV2020 1F11S11S 11DD
SDV2020 1F11S9S 11AA L
SDV2020 1F12S11S 11AAL
SDV2020 1F12S8S 11AAL
SDV2020 1F13S11S 11AA
SDV2020 1F13S11S 11AB
SDV2020 1F13S7S 11CC
SDV2020 1F13S9S 11AAL
SDV2020 1F7S6S 11AAL
SDV2020 1F7S7S 11AA
SDV2020 1F8S7S 11DD
SDV2020 1F8S8S 11  L