J45型直流式衬胶截止阀、具有结构紧凑、启闭灵活、耐腐蚀性能强，行程短（一般为公称通经1/4）等优点。被广泛应用在石油、上海工良阀门有限公司化工等管路系统中做截断介质用，但塑料衬里的截止阀严禁用做流量调节，以免节流口处产生的高速介质流冲蚀破坏密封面。
要零部件材料表
|
序号 |
零件名称 |
灰铸铁 |
铸钢 |
不锈耐酸铸钢 |
超低碳不锈耐酸铸钢 |
||
|
Z |
C |
P |
R |
PL |
RL |
||
|
1 |
阀体/阀盖 |
HT250 |
WCB |
CF8 |
CF8M |
CF3 |
CF3M |
|
2 |
球体/阀杆 |
25 |
2Cr13 |
1Cr18Ni9 |
1Cr18Ni12Mo2Ti |
00Cr18Ni10 |
00Cr17Ni14Mo2 |
|
3 |
衬里/阀座 |
PCTEF(F3),FEP(F46),PFA(可溶F4),PP,PO |
|||||
|
4 |
填料压盖 |
WCB |
CF8 |
CF8M |
CF3 |
CF3M |
|
|
5 |
填料 |
PTFE(F4) |
PTFE(F4) |
PTFE(F4) |
|||
|
6 |
活节螺栓 |
35 |
1Cr17Ni2 |
1Cr17Ni2 |
|||
|
7 |
阀杆螺母 |
ZCuAl10Fe3 |
ZCuAl10Fe3 |
ZCuAl10Fe3 |
|||
|
8 |
紧固螺栓 |
35 |
1Cr17Ni2 |
1Cr18Ni9Ti |
|||
|
9 |
螺母 |
45 |
0Cr18Ni9 |
0Cr18Ni9 |
|||
|
10 |
手柄 |
WCB |
WCB |
WCB |
|||
|
主要外形和连接尺寸 |
|
公称通经 |
L |
D |
D1 |
D2 |
f |
b |
Z-φd |
|
|
DN(mm) |
NPS(inch) |
PN1.0MPa |
||||||
|
15 |
1/2 |
130 |
95 |
65 |
45 |
2 |
14 |
4-φ14 |
|
20 |
3/4 |
150 |
105 |
75 |
55 |
2 |
16 |
4-φ14 |
|
25 |
1 |
160 |
115 |
85 |
65 |
2 |
16 |
4-φ14 |
|
32 |
11/4 |
180 |
135 |
100 |
78 |
2 |
18 |
4-φ18 |
|
40 |
11/2 |
200 |
145 |
110 |
85 |
3 |
18 |
4-φ18 |
|
50 |
2 |
230 |
160 |
125 |
100 |
3 |
20 |
4-φ18 |
|
65 |
21/2 |
290 |
180 |
145 |
120 |
3 |
20 |
4-φ18 |
|
80 |
3 |
310 |
195 |
160 |
135 |
3 |
22 |
4-φ18 |
|
100 |
4 |
350 |
215 |
180 |
155 |
3 |
22 |
8-φ18 |
|
125 |
5 |
400 |
245 |
210 |
185 |
3 |
24 |
8-φ18 |
|
150 |
6 |
480 |
280 |
240 |
210 |
3 |
24 |
8-φ23 |
|
200 |
8 |
495 |
335 |
295 |
265 |
3 |
26 |
8-φ23 |
|
250 |
10 |
622 |
390 |
350 |
320 |
3 |
28 |
12-φ23 |
|
300 |
12 |
698 |
440 |
400 |
368 |
4 |
28 |
12-φ23 |
|
350 |
14 |
787 |
500 |
460 |
428 |
4 |
30 |
16-φ23 |
