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產(chǎn)品概述：a48y半封閉帶扳手彈簧全啟式安  全閥適用于工作溫度≤350℃的蒸汽、空氣等介質(zhì)的設(shè)備和管路上。a44y全封閉帶扳手彈簧全啟式安  全閥適用于工作溫度≤300℃的空氣、石油等介質(zhì)的設(shè)備或管路上，作為超壓保護裝置。

連接法蘭標(biāo)準(zhǔn)pn＜6.4mpa按jb/t-94系列1。pn≥6.4mpa按jb/t-94系列2標(biāo)準(zhǔn)。

結(jié)構(gòu)簡述

1、帶扳手彈簧全啟式安  全閥具有結(jié)構(gòu)簡單、密封性能好、開啟壓力準(zhǔn)確、排放能力大、回座壓差小、調(diào)整方便等特點。

2、噴嘴型閥座：閥座為位伐爾噴嘴型閥座，蒸汽流經(jīng)閥座出口處時達到音速，排放系數(shù)大，閥座密封面堆焊鈷鉻鎢硬質(zhì)合金，耐磨抗沖蝕，壽命長。

3、熱彈性閥瓣：閥瓣設(shè)計為熱彈性結(jié)構(gòu)，利用其在介質(zhì)壓力下微小的變形，提高密封能力，克服安  全閥在介質(zhì)壓力下臨近整定壓力時的前泄現(xiàn)象。閥瓣密封面采用先進的激光淬火技術(shù)，提高了硬度、耐磨性、抗沖抗性。

4、調(diào)節(jié)螺母：通過調(diào)整調(diào)節(jié)螺母，調(diào)整彈簧壓縮量，使閥門能夠很方便、很迅速地獲得準(zhǔn)確的整定壓力。

5、背壓調(diào)整套：調(diào)整閥瓣背壓的輔助機構(gòu)，通過背壓調(diào)整套調(diào)整，可獲得合適的回座壓差。上調(diào)時，使閥門背壓降低。下調(diào)時，使閥門背壓提高。

安  裝說明

1、安  全閥必須垂直安  裝，并最好直接安  裝在容器或管道的接頭上。接頭內(nèi)徑應(yīng)不小于安  全閥的進口通徑。

2、安  全閥的出口必須裝設(shè)適當(dāng)?shù)呐蛎浌?jié)，以防止排放管的熱膨脹給安  全閥帶來不應(yīng)有的熱應(yīng)力。排放管內(nèi)徑應(yīng)比閥門出口直徑大，長度盡可能短，避免拐彎。排放管及膨脹節(jié)重量不應(yīng)作用在安  全閥上，應(yīng)固定在建筑上。排放管的中心線與閥體的中心線間距離盡可能的短。對每臺安  全閥都應(yīng)單獨裝設(shè)排放管。

3、消聲器的出口處要有足夠的面積，防止產(chǎn)生背壓影響閥門的排放能運行參數(shù)：型號通徑dodkgg1bff1z-øddn＇d1k1g3g2b1f＇f1＇z1-ød1ll1≈ha48y-16c a44y-16c a44y-16p a44y-16r201510575 55162 4-142511585 65162 4-1411095411251611585 65162 4-1432140100 78182 4-18110954113220140100 78182 4-1840150110 85183 4-181151004114025150110 85183 4-1850165125 100203 4-181201104725032165125 100203 4-1865185145 120203 4-181351205326540185145 120203 4-1880200160 135203 8-181601405568050200160 135203 8-18100220180 155223 8-1817013556110065220180 155203 8-18125250210 185223 8-1819517566712580250210 185223 8-18150285240 210243 8-23210190857150100285240 210243 8-23175310270 240263 8-23255230915200125340295 265263 12-23250405355 320303 12-263002601073250150405355 320303 12-26300460410 375304 12-263503201307300220460410 375304 12-26400580525 485364 16-303703501233350250520470 435344 16-26500715650 608444 20-345004501711400280580525 485364 16-30500715650 608444 20-345004501780a48y-25

a44y-25

a44y-25p a44y-25r201510575 55162 4-142511585 65162 4-1411095411251611585 65162 4-1432140100 78182 4-18110954113220140100 78182 4-1840150110 85183 4-181151004114025150110 85183 4-1850165125 100203 4-181201104725032165125 100203 4-1865185145 120203 4-181351205326540185145 120223 8-1880200160 135203 8-181601405568050200160 135223 8-18100220180 155223 8-1817013556110065230190 160243 8-23125250210 185223 8-1819517566712580270220 188283 8-26150285240 210243 8-23210190857150100300250 218303 8-26175310270 240263 8-23255230915200125360310 278343 12-26250405355 320303 12-263002601073250150425370 332363 12-30300460410 375304 12-263503201307300220485430 390404 16-30400580525 485364 16-303703501233350250555490 448444 16-34500715650 608444 20-345004501711400280620550 505484 16-36500715650 608444 20-345004501780a48y-40 a44y-40 a44y-40p a44y-40r201510575515516244-142511585 65162 4-1411095411251611585586516244-1432140100 78182 4-18110954113220140100667818244-1840150110 85183 4-181151004114025150110768518344-1850165125 100203 4-1812011047250321651258810020344-1865185145 120203 4-18135120532654018514511012022348-1880200160 135203 8-18160140556805020016012113522348-18100220180 155223 8-18170135561100652351901501602434.58-23125250210 185223 8-18195175697125802702201761882834.58-26150285240 210243 8-232101908571501003002502042183034.58-26175310270 240263 8-232552309152001253753202602823834.512-30250405355 320303 12-2630026010732501504503853133454234.512-34300460410 375304 12-2635032013073002205154503644084644.516-34400580525 485364 16-303703501233350250580510422465524516-36500715650 608444 20-345004501711400280660585474535584516-41500715650 608444 20-345004501711a48y-64

a44y-64

a44y-64p a44y-64r201012590516822244-182511585586516244-1496852972516140100587822244-1832140100667818244-181101003103220155110668224244-2340150110768518344-181301103224025170125769524344-23501651258810020344-1813512035250321801358810526344-236518514511012022348-18155135425654020516011013028348-238020016012113522348-18175160570805021517012114030348-231002351901501602434.58-23175160560100652502001501683234.58-261252702201761882834.58-251951956901501003452802042403834.58-342003753202602823834.512-30280265935a48y-100 a44y-100 a44y-100p a44y-100r201012590516822244-182511585586516344-1496852972516140100587824244-1832140100667818244-181101003103220155110668224244-2340150110768518244-181301103224025170125769526344-23501651258810020344-1813512035250321951458811228344-266518514511012022348-18155135425653222017011013832348-268020016012113522348-18175160570804023018012114834348-261002351901501602434.58-23175160560100502652101501723834.58-301252702201761882834.58-25195195690150803552902042504634.512-342003753202602823834.512-30280265935

使用范圍：a48y半封閉帶扳手彈簧全啟式安  全閥適用于工作溫度≤350℃的蒸汽、空氣等介質(zhì)的設(shè)備和管路上。a44y全封閉帶扳手彈簧全啟式安  全閥適用于工作溫度≤300℃的空氣、石油等介質(zhì)的設(shè)備或管路上，作為超壓保護裝置。