A48型高溫高壓全啟式安全閥適用于工作溫度350度的空氣、石油氣等介質(zhì)的設(shè)備和管路上,作超壓保護(hù)裝置。當(dāng)設(shè)務(wù)和管路上,作超壓保護(hù)裝置。當(dāng)設(shè)備和管路內(nèi)壓力超過允許值時(shí),閥門自動(dòng)開啟,繼而全量排放;當(dāng)壓力降低到規(guī)定值時(shí),閥門自動(dòng)關(guān)閉,保證設(shè)備和管路的正常運(yùn)行。安全閥在系統(tǒng)中起安全保護(hù)作用。當(dāng)系統(tǒng)壓力超過規(guī)定值時(shí),安全閥打開,將系統(tǒng)中的一部分氣體排入大氣,使系統(tǒng)壓力不超過允許值,從而保證系統(tǒng)不因壓力過高而發(fā)生事故。安全閥又稱溢流閥。圖示為安全閥的幾種典型結(jié)構(gòu)形式?;钊桨踩y,閥芯是一平板。氣源壓力作用在活塞上,當(dāng)壓力超過由彈簧力確定的安全值時(shí),活塞被頂開,一部分壓縮空氣即從閥口排入大氣;當(dāng)氣源壓力低于安全值時(shí),彈簧驅(qū)動(dòng)活塞下移,關(guān)閉閥口。此閥密封面要干凈。安全閥是根據(jù)壓力系統(tǒng)的工作壓力自動(dòng)啟閉,一般安裝于封閉系統(tǒng)的設(shè)備或管路上保護(hù)系統(tǒng)安全。當(dāng)設(shè)備或管道內(nèi)壓力超過安全閥設(shè)定壓力時(shí),自動(dòng)開啟泄壓,保證設(shè)備和管道內(nèi)介質(zhì)壓力在設(shè)定壓力之下,保護(hù)設(shè)備和管道正常工作,防止發(fā)生意外,減少損失。
一、彈簧微啟式外螺紋安全閥
A21F-16C A21F-25C A21F-40C A21H-16C A21H-25C A21H-40C A21H-64 A21H-100 A21H-160 A21H-320 A21W-16P A21W-25P A21W-40P A21Y-64P A21Y-100P A21Y-160P A21Y-320P A21W-16R A21W-25R A21W-40R
二、彈簧式外螺紋安全閥
A27H-10 A27H-16 A27H-16C A27W-10P A27W-16P A27W-10R A27W-16R A28H-10 A28H-16 A28H-10C A28H-16C A28W-10P A28W-16P A28W-10R A28W-16R A27W-10T
三、彈簧微啟式安全閥
A41H-16C A41H-25C A41H-40 A41H-64 A41H-100 A41H-160 A41H-320 A41Y-16P A41Y-25P A41Y-40P A41Y-64P A41Y-100P A41Y-160P A41Y-320P A41Y-16R A41Y-25R A41Y-40R A41Y-64R A41Y-100R A41Y-160R A41Y-320R A41W-16P A41W-25P A41W-40P A41W-64P A41W-100P A41W-160P A41W-320P A41W-16R A41W-25R A41W-40R A41W-64R A41W-100R A41W-160R A41W-320R
四、彈簧全啟式安全閥
A42H-16C A42H-25C A42H-40 A42H-64 A42H-100 A42H-160 A42H-320 A42Y-16C A42Y-25C A42Y-40 A42Y-64 A42Y-100 A42Y-160 A42Y-320 A42Y-16P A42Y-25P A42Y-40P A42Y-64P A42Y-100P A42Y-160P A42Y-320P A42Y-16R A42Y-25R A42Y-40R A42Y-64R A42Y-100R A42-160R A42Y-320R A42W-16P A42W-25P A42W-40P A42W-64P A42W-100P A42W-160P A42W-320P A42W-16R A42W-25R A42W-40R A42W-64R A42W-100R A42W-160R A42W-320R A42F-16C A42F-25C A42F-40
五、帯扳手彈簧微啟式安全閥
A47H-16C A47H-25C A47H-40 A47H-64 A47H-100 A47Y-16C A47Y-25C A47Y-40 A47Y-64 A47Y-100
六、帯扳手彈簧全啟式安全閥
A48H-16C A48H-25C A48H-40 A48H-64 A48H-100 A48H-160 A48H-320 A48Y-16C A48Y-25C A48Y-40 A48Y-64 A48Y-100 A48Y-160 A48Y-320 A48Y-16P A48Y-25P A48Y-40P A48Y-64P A48Y-100P A48Y-160P A48Y-320P A48W-16P A48W-25P A48W-40P A48W-64P A48W-100P A48W-160P A48W-320P A48Y-16R A48Y-25R A48Y-40R A48Y-64R A48Y-100R A48Y-160R A48Y-320R A48W-16R A48W-25R A48W-40R A48W-64R A48W-100R A48W-160R A48W-320R
七、雙聯(lián)彈簧式安全閥
A43H-16C A43H-25C A43H-40 A38Y-16C A38Y-25C A38Y-40 A37H-16C A37H-25C A37H-40
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