螺纹连接弹簧微启式安全阀
一、概述：A21F、A21H-C型螺纹连接弹簧微启式安全阀适用于工作温度≤200℃的空气、氨、石油气等介质的设备或管路上。A21W-P、A21W-R型A21W-适用于温度≤200℃有腐蚀性的气体或液体的设备或管路上，作为超压保护装置。KA21Y型A21W-适用于温度≤100℃的液化石油气等。
二、主要零部件材料Materials for main parts
NO. | 零件名称 Name of part | A21H-C/A21F 材料
KA21Y-C Materials | A21W-P/A21F-P
材料 KA21Y-P Materials | A21Y-R Materials |
1 | 管接头Union | 20 | 0Cr18Ni9 | 0Cr17Ni12Mo2 |
2 | 管接头螺母Union nut | 35 | 2Cr13 | 0Cr18Ni9 |
3 | 阀座Nozzle | 35 | 0Cr18Ni9 | 0Cr17Ni12Mo2 |
4 | 阀体Body | 2Cr13 | 0Cr18Ni9 | 0Cr17Ni12Mo2 |
5 | 阀瓣Disc | 2Cr13/2Cr13+PTFE | 0Cr18Ni9/0Cr18Ni9+PTFE | 0Cr17Ni12Mo2 |
6 | 弹簧座 Spring washer | 2Cr13 | 0Cr18Ni9 | 0Cr17Ni12Mo2 |
7 | 弹簧Spring | 50CrVA | 50CrVA包覆氟塑料
Coated Teflon | 50CrVA包覆氟塑料
Coated Teflon |
8 | 锁紧螺母Locking nut | Q235-A | 2Cr13 | 0Cr18Ni9 |
9 | 弹簧导向垫Spring guide | 2Cr13 | 0Cr18Ni9 | 0Cr17Ni12Mo2 |
10 | 调节螺母Adjusting nut | Q235-A | 2Cr13 | 0Cr17Ni12Mo2 |
| 密封面材料 Sealing surface of material | Y型堆焊Co基硬质合金Depositing stellite, H型堆焊D507 Depositing D507; W型为阀门本体body |
三、外形尺寸和连接尺寸Dimensions (mm)
型号Type | 公称通径 DN | do | d | Do | M | d1 | Di | L | L1 | «H |
KA21-16C A21H-16C A21H-40 A21W-16P A21W-40P KA21-16P | 15 | 12 | 15 | 20 | M27X1.5 | G1/2" | 30 | 35 | 76 | 66 |
20 | 16 | 20 | 25 | M33X1.5 | G3/4" | 34 | 40 | 87 | 68 |
25 | 18 | 25 | 31 | M39X1.5 | G1" | 40 | 50 | 100 | 105 |
A21Y-63 A21Y-63P A21Y-100 A21Y-100P | 15 | 10 | 15 | 25 | M39X1.5 | G1" | 44 | 50 | 100 | 66 |
20 | 10 | 20 | 31 | M39X1.5 | G1" | 44 | 50 | 100 | 68 |
25 | 12 | 25 | 31 | M39X1.5 | G1" | 44 | 50 | 100 | 105 |
A21W-160 A21W-160P | 15 | 8 | 20 | 1 | M24X2 | G1" | 44 | 52 | 100 | 261 |
20 | 8 | 25 | 1 | M33X2 | G1" | 44 | 52 | 100 | 261 |
25 | 8 | 28 | 1 | M36X2 | G1" | 44 | 52 | 100 | 285 |
