电动对夹金属硬密封蝶阀
     
     发布时间:2016年03月22日 作者:admin 点击次数:次
     
     
     对夹连接金属密封蝶阀
 | 
 
 
   
标准与规范 
| 设计与制造 | 
结构长度 | 
压力 -温度等级 | 
配管法兰 | 
试验与检验 | 
 
GB12238 
JB/T8527 | 
GB12221 | 
JB/T74、GB9131 | 
JB/T74-90 
GB9112-9131 HG20592-20596 | 
GB/T13927 | 
 
 
型号、材料及主要参数 
| 配管法兰
 | 
公称压力PN/MPa
 | 
法兰密封面
 | 
产品型号
 | 
 
JB/T74 
HG20592- 
20596 
GB9112- 
9131 | 
0.25
 | 
凸光 
滑面
 | 
D73H-2.5C
 | 
D73W-2.5P
 | 
D73W-2.5P8
 | 
D73W-2 5P3
 | 
D73W-2.5R
 | 
D73W-2.5Rs
 | 
D73W-2.5R3
 | 
 
| 0.6
 | 
D73H-6C
 | 
D73W-6P
 | 
D73W-6P8
 | 
D73W-6P3
 | 
D73W-6R
 | 
D73W-6R8
 | 
D73W-6R3
 | 
 
| 1.0
 | 
D73H-1OC
 | 
D73W-10P
 | 
D73W-10P8
 | 
D73W-10P3
 | 
D73W-10R
 | 
D73W-10Rs
 | 
D73W-10R3
 | 
 
| 1.6
 | 
D73H-16C
 | 
D73W-16P
 | 
D73W-16P8
 | 
D73W-16P3
 | 
D73W-16R
 | 
D73W-16R8
 | 
D73W-16R3
 | 
 
| 2.5
 | 
D73H-25
 | 
D73W-25P
 | 
D73W-25P8
 | 
D73W-25P3
 | 
D73W-25R
 | 
D73W-25R8
 | 
D73W-25R3
 | 
 
| 4.0
 | 
D73H-40
 | 
D73W-40P
 | 
D73W-40P8
 | 
D73W-40P3
 | 
D73W-40R
 | 
D73W-40R8
 | 
D73W-40R3
 | 
 
主要零件 
材料 | 
阀体 | 
WCB | 
ZG1Cr18Ni9Ti | 
CF8 | 
CF3 | 
ZG1Cr18Ni 
12Mo2Ti | 
CF8M | 
CF3M | 
 
| 压圈 | 
WCB | 
ZG1Cr18Ni9Ti | 
CF8(304) | 
CF3(304L) | 
ZG1Cr18Ni 
12Mo2Ti | 
CF8M(316) | 
CF3M(316L) | 
 
| 蝶板 | 
碳钢面堆焊 
Cr13 | 
ZG1Cr18Ni9Ti | 
CF8(304) | 
CF3(304L) | 
ZG1Cr18Ni 
12Mo2Ti | 
CF8M(316) | 
CF3M(316L) | 
 
| 阀杆 | 
2Cr13 | 
1Cr18Ni9Ti | 
0Cr19Ni9 | 
00Cr19Ni11 | 
1Cr18Ni 
12Mo2Ti | 
0Cr17Ni12Mo2 | 
00Cr17Ni14Mo2 | 
 
| 阀座 | 
1Cr18Ni9Ti | 
0Cr19Ni9 | 
00Cr19Ni11 | 
00Cr19Ni11 | 
0Cr17 
Ni12Mo2 | 
00Cr17 
Ni14Mo | 
00Cr17Ni14Mo2 | 
 
| 适用工况 | 
适用介质 | 
水、蒸汽、油品等 | 
硝酸等腐蚀性介质 | 
强氧化性介质 | 
醋酸等腐蚀性介质 | 
尿素等腐蚀性介质 | 
 
| 蜗轮传动蝶阀 | 
在阀门类型代号D后加入“3”表示,示例:D373H-16C | 
 
| 气动蝶阀 | 
在阀门类型代号D后加入“6”,示例:D673H-25 气压0.4~0.6MPa | 
 
| 电动蝶阀 | 
在阀门类型代号D后加“9”表示,示例:D973H-16C | 
 
 
 | 
 
 
主要尺寸及重量 
| 公称压力 PN(MPa) | 
公称通径  
DN(mm) | 
尺寸(mm) | 
重量(kg) | 
 
| L | 
D1 | 
D2 | 
Z-φd | 
H1 | 
H | 
 
短 
 | 
长 
 | 
D43 | 
D343 | 
D43 | 
D343 | 
 
| O.25 | 
40 | 
33 | 
100 | 
80 | 
4-14 | 
76 | 
198 | 
248 | 
35 | 
67 | 
 
| 50 | 
43 | 
110 | 
90 | 
4-14 | 
85 | 
202 | 
254 | 
43 | 
76 | 
 
| 65 | 
46 | 
130 | 
110 | 
4-14 | 
95 | 
222 | 
278 | 
52 | 
98 | 
 
| 80 | 
49 | 
64 | 
150 | 
125 | 
4-18 | 
110 | 
246 | 
312 | 
74 | 
12 | 
 
| 100 | 
56 | 
64 | 
170 | 
145 | 
4-18 | 
122 | 
270 | 
330 | 
102 | 
168 | 
 
| 125 | 
64 | 
70 | 
200 | 
175 | 
8-18 | 
138 | 
294 | 
368 | 
14 | 
202 | 
 
| 150 | 
70 | 
76 | 
225 | 
200 | 
8-18 | 
158 | 
326 | 
404 | 
178 | 
249 | 
 
| 200 | 
71 | 
89 | 
280 | 
255 | 
8-18 | 
188 | 
- | 
496 | 
- | 
455 | 
 
| 250 | 
76 | 
114 | 
335 | 
310 | 
12-18 | 
224 | 
- | 
558 | 
- | 
589 | 
 
| 300 | 
83 | 
114 | 
395 | 
362 | 
12-23 | 
254 | 
- | 
632 | 
- | 
742 | 
 
| 350 | 
92 | 
127 | 
445 | 
412 | 
12-23 | 
288 | 
- | 
672 | 
- | 
96 | 
 
| 400 | 
102 | 
140 | 
495 | 
462 | 
16-23 | 
320 | 
- | 
714 | 
- | 
1273 | 
 
| 450 | 
114 | 
152 | 
550 | 
518 | 
16-23 | 
350 | 
- | 
768 | 
- | 
1664 | 
 
| 500 | 
127 | 
152 | 
600 | 
568 | 
16-23 | 
388 | 
- | 
828 | 
- | 
213 | 
 
| 600 | 
154 | 
178 | 
705 | 
670 | 
20-25/26 | 
440 | 
- | 
952 | 
- | 
287 | 
 
| 700 | 
165 | 
229 | 
810 | 
775 | 
24-25/26 | 
488 | 
- | 
1000 | 
- | 
412 | 
 
| 800 | 
190 | 
341 | 
920 | 
880 | 
24-30 | 
572 | 
- | 
1078 | 
- | 
549 | 
 
| 900 | 
203 | 
341 | 
1020 | 
980 | 
24-30 | 
628 | 
- | 
1180 | 
- | 
726 | 
 
| 1000 | 
216 | 
300 | 
1120 | 
1080 | 
28-30 | 
698 | 
- | 
1272 | 
- | 
921 | 
 
| 1200 | 
254 | 
360 | 
1320 | 
1280 | 
32-30 | 
810 | 
- | 
1418 | 
- | 
1127 | 
 
| 1400 | 
381 | 
390 | 
1520 | 
1480 | 
36-30 | 
940 | 
- | 
1519 | 
- | 
1388 | 
 
| 1600 | 
457 | 
440 | 
1730 | 
1690 | 
40-30 | 
1060 | 
- | 
1629 | 
- | 
1772 | 
 
| 1800 | 
457 | 
490 | 
1970 | 
1910 | 
44-34 | 
1090 | 
- | 
1763 | 
- | 
1984 | 
 
| 2000 | 
508 | 
540 | 
2180 | 
2110 | 
48-34 | 
1195 | 
- | 
2094 | 
- | 
2563 | 
 
| 0.6 | 
40 | 
33 | 
100 | 
80 | 
4-14 | 
76 | 
200 | 
250 | 
3.8 | 
71 | 
 
| 50 | 
43 | 
110 | 
90 | 
4-14 | 
85 | 
208 | 
260 | 
4.8 | 
81 | 
 
| 65 | 
46 | 
130 | 
110 | 
4-14 | 
95 | 
228 | 
284 | 
5.7 | 
1O5 | 
 
| 80 | 
49 | 
64 | 
150 | 
125 | 
4-18 | 
119 | 
256 | 
322 | 
8.1 | 
147 | 
 
| 100 | 
56 | 
64 | 
170 | 
145 | 
4-18 | 
122 | 
278 | 
338 | 
1.1 | 
176 | 
 
| 125 | 
64 | 
70 | 
200 | 
175 | 
8-18 | 
138 | 
298 | 
372 | 
15.2 | 
214 | 
 
| 150 | 
70 | 
76 | 
225 | 
200 | 
8-18 | 
158 | 
326 | 
404 | 
19.5 | 
266 | 
 
| 200 | 
71 | 
89 | 
280 | 
255 | 
8-18 | 
188 | 
- | 
496 | 
- | 
475 | 
 
| 250 | 
76 | 
114 | 
335 | 
310 | 
12-18 | 
224 | 
- | 
558 | 
- | 
61 | 
 
| 300 | 
83 | 
114 | 
395 | 
362 | 
12-23 | 
254 | 
- | 
632 | 
- | 
76 | 
 
| 350 | 
92 | 
127 | 
445 | 
412 | 
12-23 | 
288 | 
- | 
672 | 
- | 
99 | 
 
| 400 | 
102 | 
140 | 
495 | 
462 | 
16-23 | 
320 | 
- | 
714 | 
- | 
131 | 
 
| 450 | 
114 | 
152 | 
550 | 
518 | 
16-23 | 
350 | 
- | 
768 | 
- | 
169 | 
 
| 500 | 
127 | 
152 | 
600 | 
568 | 
16-23 | 
388 | 
- | 
828 | 
- | 
2165 | 
 
| 600 | 
154 | 
178 | 
705 | 
670 | 
20-25/26 | 
440 | 
- | 
952 | 
- | 
2925 | 
 
| 700 | 
165 | 
229 | 
810 | 
775 | 
24-25/26 | 
488 | 
- | 
1000 | 
- | 
416 | 
 
| 800 | 
190 | 
241 | 
920 | 
880 | 
24-30 | 
572 | 
- | 
1078 | 
- | 
553 | 
 
| 900 | 
203 | 
241 | 
1020 | 
980 | 
24-30 | 
628 | 
- | 
1180 | 
- | 
7315 | 
 
| 1000 | 
216 | 
300 | 
1120 | 
1080 | 
28-30 | 
698 | 
- | 
1272 | 
- | 
931 | 
 
| 1200 | 
254 | 
360 | 
1340 | 
1295 | 
32-34 | 
810 | 
- | 
1418 | 
- | 
1132 | 
 
| 1400 | 
381 | 
390 | 
1560 | 
1510 | 
36-34 | 
940 | 
- | 
1519 | 
- | 
1395 | 
 
| 1600 | 
457 | 
440 | 
1760 | 
1710 | 
40-34 | 
1060 | 
- | 
1629 | 
- | 
1785 | 
 
| 1800 | 
457 | 
490 | 
1970 | 
1910 | 
44-41 | 
1150 | 
- | 
1763 | 
- | 
2015 | 
 
| 2000 | 
508 | 
540 | 
2180 | 
2110 | 
48-48 | 
1265 | 
- | 
2094 | 
- | 
2580 | 
 
 
主要尺寸及重量 
公称    
压力    
PN(MPa) 
 | 
公称通径 
DN(am) 
 | 
尺寸(am) 
 | 
重量 (kg) 
 | 
 
| L | 
D1 | 
D2 | 
Z-φd | 
H1 | 
H | 
 
短 
 | 
长 
 | 
D43 | 
D343 | 
D43 | 
D343 | 
 
| 1.O | 
40 | 
33 | 
110 | 
85 | 
4-18 | 
76 | 
200 | 
250 | 
4 | 
75 | 
 
| 50 | 
43 | 
125 | 
100 | 
4-18 | 
85 | 
208 | 
260 | 
5 | 
85 | 
 
| 65 | 
46 | 
145 | 
120 | 
4-18 | 
95 | 
228 | 
284 | 
6 | 
11 | 
 
| 80 | 
49 | 
64 | 
160 | 
135 | 
4-18 | 
110 | 
256 | 
322 | 
85 | 
155 | 
 
| 100 | 
56 | 
64 | 
180 | 
155 | 
8-18 | 
122 | 
278 | 
338 | 
115 | 
185 | 
 
| 125 | 
64 | 
70 | 
210 | 
185 | 
8-18 | 
138 | 
298 | 
372 | 
16 | 
225 | 
 
| 150 | 
70 | 
76 | 
240 | 
21O | 
8-23 | 
158 | 
326 | 
404 | 
205 | 
28 | 
 
| 200 | 
71 | 
89 | 
295 | 
265 | 
8-23 | 
188 | 
- | 
496 | 
- | 
50 | 
 
| 250 | 
76 | 
114 | 
350 | 
320 | 
12-23 | 
224 | 
- | 
558 | 
- | 
64 | 
 
| 300 | 
83 | 
114 | 
400 | 
368 | 
12-23 | 
254 | 
- | 
632 | 
- | 
80 | 
 
| 350 | 
92 | 
127 | 
460 | 
428 | 
12-23 | 
288 | 
- | 
672 | 
- | 
104 | 
 
| 400 | 
102 | 
140 | 
515 | 
482 | 
12-25/26 | 
320 | 
- | 
714 | 
- | 
138 | 
 
| 450 | 
114 | 
152 | 
565 | 
532 | 
20-25/26 | 
350 | 
- | 
768 | 
- | 
178 | 
 
| 500 | 
127 | 
152 | 
620 | 
585 | 
20-25/26 | 
388 | 
- | 
828 | 
- | 
228 | 
 
| 600 | 
154 | 
178 | 
725 | 
685 | 
20-30 | 
440 | 
- | 
952 | 
- | 
308 | 
 
| 700 | 
165 | 
229 | 
840 | 
800 | 
24-30 | 
488 | 
- | 
1000 | 
- | 
438 | 
 
| 800 | 
190 | 
241 | 
950 | 
905 | 
24-34 | 
572 | 
- | 
1078 | 
- | 
582 | 
 
| 900 | 
203 | 
241 | 
1050 | 
1005 | 
28-34 | 
628 | 
- | 
1180 | 
- | 
770 | 
 
| 100 | 
216 | 
300 | 
1160 | 
1115 | 
28-34 | 
698 | 
- | 
1272 | 
- | 
980 | 
 
| 1200 | 
254 | 
360 | 
1380 | 
1325 | 
32-41 | 
810 | 
- | 
1418 | 
- | 
1192 | 
 
| 1400 | 
381 | 
390 | 
1590 | 
1525 | 
36-48 | 
940 | 
- | 
1519 | 
- | 
1460 | 
 
| 1600 | 
457 | 
400 | 
1820 | 
1750 | 
40-54 | 
1060 | 
- | 
1629 | 
- | 
1850 | 
 
| 1800 | 
457 | 
490 | 
2020 | 
1950 | 
44-54 | 
1150 | 
- | 
1763 | 
- | 
2082 | 
 
| 2000 | 
508 | 
540 | 
2230 | 
2160 | 
46-54 | 
1265 | 
- | 
2094 | 
- | 
2661 | 
 
|   | 
40 | 
33 | 
110 | 
85 | 
4-18 | 
76 | 
220 | 
250 | 
4.5 | 
8 | 
 
| 50 | 
43 | 
125 | 
100 | 
4-18 | 
85 | 
208 | 
260 | 
5.5 | 
9 | 
 
| 65 | 
46 | 
145 | 
120 | 
4-18 | 
95 | 
228 | 
284 | 
6.5 | 
115 | 
 
| 80 | 
49 | 
64 | 
160 | 
135 | 
8-18 | 
110 | 
256 | 
322 | 
9 | 
16 | 
 
| 100 | 
56 | 
64 | 
180 | 
155 | 
8-18 | 
122 | 
278 | 
338 | 
12 | 
19 | 
 
| 125 | 
64 | 
70 | 
210 | 
185 | 
8-18 | 
138 | 
298 | 
372 | 
17 | 
235 | 
 
| 150 | 
70 | 
76 | 
240 | 
21O | 
8-23 | 
158 | 
326 | 
404 | 
21.5 | 
295 | 
 
| 200 | 
71 | 
89 | 
295 | 
265 | 
12-23 | 
188 | 
- | 
496 | 
- | 
52 | 
 
| 250 | 
76 | 
114 | 
355 | 
320 | 
12-25/26 | 
224 | 
- | 
558 | 
- | 
66 | 
 
| 300 | 
83 | 
114 | 
410 | 
375 | 
12-25/26 | 
254 | 
- | 
632 | 
- | 
83 | 
 
| 350 | 
92 | 
127 | 
470 | 
435 | 
16/25/26 | 
288 | 
- | 
672 | 
- | 
108 | 
 
| 1.6 | 
400 | 
102 | 
140 | 
525 | 
485 | 
16-30 | 
320 | 
- | 
714 | 
- | 
142 | 
 
| 450 | 
114 | 
152 | 
585 | 
545 | 
20-30 | 
350 | 
- | 
768 | 
- | 
182 | 
 
| 500 | 
127 | 
152 | 
650 | 
608 | 
20-34 | 
388 | 
- | 
828 | 
- | 
234 | 
 
| 600 | 
154 | 
178 | 
770 | 
718 | 
20-34/41 | 
440 | 
- | 
952 | 
- | 
316 | 
 
| 700 | 
165 | 
229 | 
840 | 
788 | 
24-36/41 | 
488 | 
- | 
1000 | 
- | 
448 | 
 
| 800 | 
190 | 
241 | 
950 | 
898 | 
24-41 | 
572 | 
- | 
1078 | 
- | 
592 | 
 
| 900 | 
203 | 
241 | 
1050 | 
998 | 
28-41 | 
628 | 
- | 
1180 | 
- | 
784 | 
 
| 1OOO | 
216 | 
300 | 
1170 | 
1110 | 
28-42/48 | 
698 | 
- | 
1272 | 
- | 
1000 | 
 
| 1200 | 
254 | 
360 | 
1390 | 
1325 | 
32-48/54 | 
810 | 
- | 
1418 | 
- | 
1212 | 
 
| 1400 | 
381 | 
390 | 
1590 | 
1525 | 
36-48/54 | 
940 | 
- | 
1519 | 
- | 
1483 | 
 
| 1600 | 
457 | 
440 | 
1820 | 
1750 | 
40-58 | 
1060 | 
- | 
1629 | 
- | 
1875 | 
 
 
主要尺寸及重量 
| 公称压力 PN(MPa) | 
公称通径 
DN(mm) | 
尺寸(mm) | 
重量 (kg) | 
 
| L | 
D1 | 
D2 | 
Z-φd | 
H1 | 
H | 
 
| 短 | 
长 | 
D43 | 
D343 | 
D43 | 
D343 | 
 
| 2.5 | 
40 | 
33 | 
110 | 
85 | 
4-18 | 
76 | 
200 | 
250 | 
5 | 
85 | 
 
| 50 | 
43 | 
125 | 
100 | 
4-18 | 
85 | 
208 | 
260 | 
6 | 
95 | 
 
| 65 | 
46 | 
145 | 
120 | 
8-18 | 
95 | 
228 | 
294 | 
7 | 
12 | 
 
| 80 | 
49 | 
64 | 
160 | 
135 | 
8-18 | 
110 | 
256 | 
332 | 
95 | 
17 | 
 
| 100 | 
56 | 
64 | 
190 | 
160 | 
8-23 | 
130 | 
285 | 
364 | 
13 | 
20 | 
 
| 125 | 
64 | 
70 | 
220 | 
188 | 
8-25/26 | 
148 | 
308 | 
396 | 
18 | 
245 | 
 
| 150 | 
70 | 
76 | 
250 | 
218 | 
8-25/26 | 
165 | 
336 | 
430 | 
225 | 
305 | 
 
| 200 | 
71 | 
89 | 
310 | 
278 | 
12-25/26 | 
198 | 
- | 
522 | 
- | 
54 | 
 
| 250 | 
76 | 
114 | 
370 | 
332 | 
12-30 | 
234 | 
- | 
574 | 
- | 
68 | 
 
| 300 | 
83 | 
114 | 
430 | 
390 | 
16-30 | 
266 | 
- | 
668 | 
- | 
86 | 
 
| 350 | 
92 | 
127 | 
490 | 
448 | 
16-34 | 
302 | 
- | 
708 | 
- | 
112 | 
 
| 400 | 
102 | 
140 | 
550 | 
505 | 
16-34/36 | 
338 | 
- | 
750 | 
- | 
148 | 
 
| 450 | 
114 | 
152 | 
600 | 
555 | 
20-34/36 | 
365 | 
- | 
804 | 
- | 
190 | 
 
| 500 | 
127 | 
152 | 
660 | 
610 | 
20-41/36 | 
402 | 
- | 
862 | 
- | 
242 | 
 
| 600 | 
154 | 
178 | 
770 | 
718 | 
20-41 | 
448 | 
- | 
1008 | 
- | 
326 | 
 
| 700 | 
165 | 
229 | 
875 | 
815 | 
24-48/42 | 
498 | 
- | 
1075 | 
- | 
460 | 
 
| 800 | 
190 | 
241 | 
990 | 
930 | 
24-48 | 
580 | 
- | 
1136 | 
- | 
620 | 
 
| 900 | 
203 | 
241 | 
1090 | 
1025 | 
28-54/48 | 
640 | 
- | 
1248 | 
- | 
825 | 
 
| 1000 | 
216 | 
300 | 
1210 | 
1140 | 
28-58 | 
718 | 
- | 
1340 | 
- | 
1050 | 
 
| 1200 | 
254 | 
360 | 
1420 | 
1350 | 
32-58 | 
890 | 
- | 
1519 | 
- | 
1537 | 
 
| 1400 | 
381 | 
390 | 
1640 | 
1560 | 
36-65 | 
101O | 
- | 
1629 | 
- | 
2319 | 
 
| 4.0 | 
40 | 
33 | 
110 | 
85 | 
4-18 | 
96 | 
198 | 
248 | 
5.6 | 
91 | 
 
| 50 | 
43 | 
125 | 
10 | 
4-18 | 
105 | 
202 | 
254 | 
6.8 | 
103 | 
 
| 65 | 
46 | 
145 | 
120 | 
8-18 | 
115 | 
222 | 
288 | 
7.5 | 
124 | 
 
| 80 | 
49 | 
64 | 
160 | 
135 | 
8-18 | 
125 | 
246 | 
322 | 
10.4 | 
179 | 
 
| 100 | 
56 | 
64 | 
190 | 
160 | 
8-23 | 
140 | 
280 | 
355 | 
14 | 
21 | 
 
| 125 | 
64 | 
70 | 
220 | 
188 | 
8-25/26 | 
160 | 
305 | 
392 | 
19.2 | 
257 | 
 
| 150 | 
70 | 
76 | 
250 | 
218 | 
8-25/26 | 
176 | 
336 | 
428 | 
24 | 
32 | 
 
| 200 | 
71 | 
89 | 
320 | 
282 | 
12-30 | 
206 | 
- | 
520 | 
- | 
56 | 
 
| 250 | 
76 | 
144 | 
385 | 
345 | 
12-34 | 
240 | 
- | 
580 | 
- | 
71 | 
 
| 300 | 
83 | 
114 | 
450 | 
408 | 
16-34 | 
270 | 
- | 
675 | 
- | 
89 | 
 
| 350 | 
92 | 
127 | 
510 | 
465 | 
16-34/36 | 
310 | 
- | 
728 | 
- | 
116 | 
 
| 400 | 
102 | 
140 | 
585 | 
535 | 
16-41 | 
350 | 
- | 
770 | 
- | 
1525 | 
 
| 450 | 
114 | 
152 | 
610 | 
560 | 
20-41 | 
380 | 
- | 
820 | 
- | 
195 | 
 
| 500 | 
127 | 
152 | 
670 | 
612 | 
20-48/42 | 
420 | 
- | 
880 | 
- | 
248 | 
 
| 600 | 
154 | 
178 | 
795 | 
730 | 
20-54/48 | 
450 | 
- | 
1030 | 
- | 
334 | 
 
| 700 | 
165 | 
229 | 
900 | 
835 | 
24-54/48 | 
490 | 
- | 
1100 | 
- | 
470 | 
 
| 800 | 
190 | 
241 | 
1030 | 
960 | 
24-58 | 
610 | 
- | 
1210 | 
- | 
635 | 
 
 
注:表中的产品型号为采JB/T74-90系列2(即原机标JB74-90-59)法兰标准,如采HG20592-20596,GB9112-GB9131,JB/T74-90系列1法兰标准(即等效采用德国DIN标准),应在产品型号后加“G”,示例:D43H-25-G 
 
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