Renewable metal seat butterfly valve triple eccentric structure
Valve Type: |
Flange butterfly valve |
Structure: |
Eccentric |
Standard: |
API/EN/JIS |
Workmanship: |
Investment casting |
Sealing direction: |
Bidirectional |
Sealing grade: |
Zero leakage |
Temperature: |
-190°C < T < 700°C |
Operation: |
Handle |
Characteristics
This replaceable seat metal-to-metal butterfly valve adopts triple eccentric structure with stellite hardfacing. The modular seat can be replaced on pipeline without removing the whole valve to save maintenance cost. Featuring friction-free opening and self-tightening bidirectional zero leakage, it withstands high temperature and particle erosion. Equipped with flanged ends and optional pneumatic actuator, it is widely used for steam, flue gas and abrasive medium in power, heating and chemical industries.

Advantages
1.Convenient maintenance and cost-effective repair
The renewable valve seat is modular and can be replaced individually without dismantling the entire valve or the pipeline, enabling quick on-site replacement and significantly reducing downtime and spare parts costs.
2.Metal hard seal, strong adaptability to working conditions
The metal to metal seat is resistant to high temperatures and dust particle erosion, free from rubber aging, featuring triple eccentricity with no friction, and achieving zero leakage in both directions under high pressure.
3.The flange structure is sturdy, and the drive selection is flexible
The integral flange is pressure-resistant and seismic-resistant, and can be equipped with pneumatic/electric actuators to achieve remote on/off control, suitable for automation pipelines across multiple industries.
Packing
Standard export wooden case packaging

Application Scenarios
The replaceable seat eccentric butterfly valve is widely applied in power plant desulfurization ducts, heating high-temperature steam pipelines, metallurgical furnace flue gas pipes, petrochemical thermal oil lines and industrial wastewater piping with solid particles.



Material
|
Part name |
Meterial |
|
Valve body |
WCB,QT450-10,Q235,Alloy steel,stainless steel,etc. |
|
Valve stem |
Alloy steel,stainless steel |
|
Seal ring |
Stainless steel composite multi-level |
|
Packing |
Flexible graphite or stuffing |
|
Valve seat |
Stainless steel,cobalt based hard alloy |
|
Valve stem |
Stainless steel |
Dimension

|
PN (MPa) |
DN (mm) |
L |
D |
D1 |
D2 |
Z-φd |
b |
f |
H |
H0 |
A |
B |
|
1.0 |
150 |
140 |
285 |
240 |
211 |
8-φ22 |
24 |
2 |
385 |
230 |
66 |
150 |
|
200 |
152 |
340 |
295 |
266 |
8-φ22 |
24 |
2 |
471 |
297 |
85 |
170 |
|
|
250 |
165 |
395 |
350 |
319 |
12-φ22 |
26 |
2 |
533 |
327 |
85 |
170 |
|
|
300 |
178 |
445 |
400 |
370 |
12-φ22 |
26 |
2 |
606 |
364 |
106 |
205 |
|
|
350 |
190 |
505 |
460 |
429 |
16-φ22 |
26 |
2 |
694 |
404 |
106 |
205 |
|
|
400 |
216 |
565 |
515 |
480 |
16-φ26 |
26 |
2 |
757 |
444 |
130 |
240 |
|
|
450 |
222 |
615 |
565 |
530 |
20-φ26 |
28 |
2 |
814 |
472 |
155 |
240 |
|
|
500 |
229 |
670 |
620 |
582 |
20-φ26 |
28 |
2 |
902 |
522 |
169 |
306 |
|
|
600 |
267 |
780 |
725 |
582 |
20-φ30 |
30 |
5 |
1048 |
590 |
198 |
324 |
|
|
700 |
292 |
895 |
840 |
794 |
24-φ30 |
30 |
5 |
1277 |
810 |
220 |
335 |
|
|
800 |
318 |
1015 |
950 |
901 |
24-φ33 |
32 |
5 |
1385 |
844 |
241 |
356 |
|
|
900 |
330 |
1115 |
1050 |
1001 |
28-φ33 |
34 |
5 |
1490 |
890 |
241 |
356 |
|
|
1000 |
410 |
1230 |
1160 |
1112 |
28-φ36 |
34 |
5 |
1985 |
1228 |
241 |
356 |
|
|
1200 |
470 |
1455 |
1380 |
1328 |
32-φ39 |
38 |
5 |
2191 |
1340 |
35 |
785 |
|
|
1400 |
530 |
1675 |
1590 |
1530 |
36-φ42 |
42 |
5 |
2326 |
1450 |
35 |
785 |
|
|
1600 |
600 |
1915 |
1820 |
1750 |
40-φ48 |
46 |
5 |
2685 |
1590 |
35 |
785 |
|
|
1800 |
670 |
2115 |
2020 |
1950 |
44-φ48 |
50 |
5 |
2924 |
1710 |
60 |
865 |
|
|
1.6 |
150 |
140 |
285 |
240 |
211 |
8-φ22 |
24 |
2 |
385 |
230 |
66 |
150 |
|
200 |
152 |
340 |
295 |
266 |
8-φ22 |
24 |
2 |
471 |
297 |
85 |
170 |
|
|
250 |
165 |
395 |
350 |
319 |
12-φ22 |
26 |
2 |
533 |
327 |
85 |
170 |
|
|
300 |
178 |
445 |
400 |
370 |
12-φ22 |
32 |
2 |
606 |
364 |
106 |
205 |
|
|
350 |
190 |
505 |
460 |
429 |
16-φ22 |
34 |
2 |
694 |
404 |
106 |
205 |
|
|
400 |
216 |
565 |
515 |
480 |
16-φ26 |
36 |
2 |
757 |
444 |
130 |
240 |
|
|
450 |
222 |
615 |
565 |
530 |
20-φ26 |
38 |
2 |
814 |
472 |
155 |
240 |
|
|
500 |
229 |
670 |
620 |
582 |
20-φ26 |
42 |
2 |
902 |
522 |
169 |
306 |
|
|
600 |
267 |
780 |
725 |
582 |
20-φ30 |
44 |
5 |
1048 |
590 |
198 |
324 |
|
|
700 |
292 |
895 |
840 |
794 |
24-φ30 |
46 |
5 |
1277 |
810 |
220 |
335 |
|
|
800 |
318 |
1015 |
950 |
901 |
24-φ33 |
48 |
5 |
1385 |
844 |
241 |
356 |
|
|
900 |
330 |
1115 |
1050 |
1001 |
28-φ33 |
34 |
5 |
1490 |
890 |
241 |
356 |
|
|
1000 |
410 |
1230 |
1160 |
1112 |
28-φ36 |
38 |
5 |
2010 |
1245 |
241 |
356 |
|
|
1200 |
470 |
1455 |
1380 |
1328 |
32-φ39 |
42 |
5 |
2220 |
1360 |
35 |
785 |
|
|
1400 |
530 |
1675 |
1590 |
1530 |
36-φ42 |
44 |
5 |
3437 |
1456 |
35 |
785 |
|
|
1600 |
600 |
1915 |
1820 |
1750 |
40-φ48 |
46 |
5 |
2756 |
1650 |
35 |
785 |
|
|
1800 |
670 |
2115 |
2020 |
1950 |
44-φ48 |
48 |
5 |
2985 |
1760 |
60 |
865 |















