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微啟式外螺紋安全閥產(chǎn)品概述
a21f、a21h-c型適用于工作溫度≤200℃的空氣、氨、石油氣……等介質(zhì)的設備或管路上。a21w-p、r型適用于溫度≤200℃有腐蝕性的氣體或液體的設備或管路上，作為超壓保護裝置。ka21y型適用于溫度≤100℃的液化石油氣等。
a21h-16c a21h-40 a21h-64 a21y-100 a21h-160
a21w-16p a21w-40p a21f-40p a21w-64p a21w-100p a21w-160p
ka21y-16c ka21y-16p a21y-16r a21y-40r a21y-64r a21y-100r a21y-160r
微啟式外螺紋安全閥主要零部件
| no. | 零件名稱 | a21h-c/a21f材料 | a21w-p/a21f-p材料 | a21y-r材料 |
| 1 | 管接頭 | 20 | 1cr18ni9ti | 1cr18ni12mo2ti |
| 2 | 管接頭螺母 | 35 | 2cr13 | 1cr18ni9ti |
| 3 | 閥座 | 35 | 1cr18ni9ti | 1cr18ni12mo2ti |
| 4 | 閥體 | 2cr13 | 1cr18ni9ti | 1cr18ni12mo2ti |
| 5 | 閥瓣 | 2cr13/2cr13+ptfe | 1cr18ni9ti/1cr18ni9ti+ptfe | 1cr18ni12mo2ti |
| 6 | 彈簧座 | 2cr13 | 1cr18ni9ti | 1cr18ni12mo2ti |
| 7 | 彈簧 | 50crva | 50crva包覆氟塑料 | 50crva包覆氟塑料 |
| 8 | 鎖緊螺母 | q235-a | zg230-450 | 1cr18ni9ti |
| 9 | 彈簧導向墊 | 2cr13 | 1cr18ni9ti | 1cr18ni12mo2ti |
| 10 | 調(diào)節(jié)螺母 | 2cr13 | 1cr18ni12mo2ti | |
| 密封面材料 | 'y'型堆焊co基硬質(zhì)合金,'h'型堆焊d507,'w'型為閥門本體 | |||
微啟式外螺紋安全閥外形和連接尺寸
| 型號 | 公稱通徑 | do | d | do | m | d1 | d1 | l | l1 | ≈h |
| ka21-16c a21h-16c a21h-40 a21w-16p a21w-40p ka21-16p |
15 | 12 | 15 | 20 | m27×1.5 | g1/2' | 30 | 35 | 76 | 66 |
| 20 | 16 | 20 | 25 | m33×1.5 | g3/4' | 35 | 40 | 87 | 68 | |
| 25 | 18 | 25 | 31 | m39×1.5 | g1' | 40 | 50 | 100 | 105 | |
| a21y-64 a21y-64p a21y-100 a21y-100p |
15 | 10 | 15 | 25 | m39×1.5 | g1' | 44 | 50 | 100 | 66 |
| 20 | 10 | 20 | 31 | m39×1.5 | g1' | 44 | 50 | 100 | 68 | |
| 25 | 12 | 25 | 31 | m39×1.5 | g1' | 44 | 50 | 100 | 105 | |
| a21w-160/160p | 15 | 8 | 20 | / | m24×2 | g1' | 44 | 50 | 100 | 261 |
| 20 | 8 | 25 | / | m33×2 | g1' | 44 | 50 | 100 | 261 | |
| 25 | 8 | 28 | / | m36×2 | g1' | 44 | 50 | 100 | 285 |
