Customization: | Available |
---|---|
Custom Design: | Accept |
Hardness: | 45-50HRC |
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UNS R30003 Valve Seat Chemical composition :
Grade |
C |
Mn |
Si |
Cr |
Ni |
Mo |
W |
Co |
Fe |
P |
S |
Density (g/cm3) |
Hardness (HRC) |
Co 3 |
2.0-2.7 |
1.0 |
1.0 |
29-33 |
3.0 |
11-14 |
Bal. |
3.0 |
≤0.03 |
≤0.03 |
8.55 |
51-55 |
|
Co 20 |
2.2-3.0 |
2.0 |
30-34 |
3.0 |
1.0 |
14-18 |
Bal. |
3.0 |
≤0.05 |
≤0.05 |
8.65 |
53-59 |
API Valve Seat and ball Standard
No. |
Specifications |
Seat Dimensions OD/ID×H (in) |
Weight (g/pc) |
Ball Dimensions |
Weight (g/pc) |
1 |
VII-106 |
0.793/0.460×0.500 |
22.81 |
15.88 |
18.44 |
2 |
VII-125 |
0.918/0.550×0.500 |
29.55 |
19.05 |
31.84 |
3 |
VII-150 |
1.168/0.670×0.500 |
49.53 |
23.83 |
62.32 |
4 |
VII-175 |
1.388/0.825×0.500 |
68.13 |
28.58 |
107.51 |
5 |
VII-200 |
1.478/0.960×0.500 |
69.05 |
31.75 |
147.40 |
6 |
VII-225 |
1.720/1.060×0.500 |
100.34 |
34.93 |
196.27 |
7 |
VII-250 |
2.010/1.310×0.500 |
127.04 |
42.88 |
363.10 |
8 |
VII-375-1 |
3.072/1.700×0.750 |
536.94 |
57.15 |
859.63 |
9 |
VII-375-2 |
3.072/1.880×0.750 |
484.12 |
57.15 |
859.63 |