First, an overview of low temperature valve
There are two kinds of low-temperature valve cover design. The first is a bolt-type bonnet, according to this design of the valve, the valve body and the valve cap bolts and nuts, wound gasket (316 clip flexible graphite). Customers can also use special metal ring connection. The second design is welded bonnet, according to this design of the valve, the valve body and the valve cap screwed, all-welded seal. Customers have special requirements can also be used when welding penetration.
Second, the main components of low temperature valve material
1, valve body, bonnet: stainless steel
2, stem: 1Cr18Ni9Ti
3, gate, valve seat sealing surface: surfacing carbide
4, stem nut: aluminum bronze
5, gaskets: asbestos, wax asbestos rubber Board
6, packing: flexible graphite, PTFE, PTFE asbestos roving
7, hand wheel: ductile iron or steel forging
Third, the main specifications size
|
1.6MPa |
DN |
L |
D |
D1 |
D2 |
b |
n-Φd |
H |
D0 |
|
Convex flange |
20 |
150 |
105 |
75 |
55 |
14 |
4-Φ14 |
320 |
140 |
|
25 |
160 |
115 |
85 |
65 |
14 |
4-Φ14 |
350 |
160 |
|
|
32 |
180 |
135 |
100 |
78 |
16 |
4-Φ18 |
385 |
180 |
|
|
40 |
200 |
145 |
110 |
85 |
16 |
4-Φ18 |
420 |
220 |
|
|
50 |
250 |
160 |
125 |
100 |
16 |
4-Φ18 |
540 |
240 |
|
|
65 |
265 |
180 |
145 |
120 |
18 |
4-Φ18 |
610 |
240 |
|
|
80 |
280 |
195 |
160 |
135 |
20 |
8-Φ18 |
690 |
280 |
|
|
100 |
300 |
215 |
180 |
155 |
20 |
8-Φ18 |
780 |
300 |
|
|
125 |
325 |
245 |
210 |
185 |
22 |
8-Φ18 |
930 |
320 |
|
|
150 |
350 |
280 |
240 |
210 |
24 |
8-Φ23 |
980 |
350 |
|
|
200 |
400 |
335 |
295 |
265 |
26 |
12-Φ23 |
1180 |
400 |
|
|
250 |
450 |
105 |
355 |
320 |
30 |
12-Φ25 |
1390 |
450 |
|
|
300 |
500 |
460 |
410 |
375 |
30 |
12-Φ25 |
1620 |
500 |
|
|
350 |
550 |
520 |
470 |
435 |
34 |
16-Φ25 |
1810 |
500 |
|
|
400 |
600 |
580 |
525 |
485 |
36 |
16-Φ30 |
1970 |
550 |
|
|
2.5MPa |
20 |
150 |
105 |
75 |
55 |
16 |
4-Φ14 |
320 |
140 |
|
Convex flange |
25 |
160 |
115 |
85 |
65 |
16 |
4-Φ14 |
350 |
160 |
|
32 |
180 |
135 |
100 |
78 |
18 |
4-Φ18 |
385 |
180 |
|
|
40 |
200 |
145 |
110 |
85 |
18 |
4-Φ18 |
420 |
200 |
|
|
50 |
250 |
160 |
125 |
100 |
20 |
4-Φ18 |
540 |
240 |
|
|
65 |
265 |
180 |
145 |
120 |
22 |
8-Φ18 |
510 |
240 |
|
|
80 |
280 |
195 |
160 |
135 |
22 |
8-Φ18 |
690 |
280 |
|
|
100 |
300 |
230 |
190 |
160 |
24 |
8-Φ23 |
780 |
300 |
|
|
125 |
325 |
270 |
220 |
188 |
28 |
8-Φ25 |
930 |
300 |
|
|
150 |
350 |
300 |
250 |
218 |
30 |
8-Φ25 |
980 |
320 |
|
|
200 |
400 |
360 |
310 |
278 |
34 |
12-Φ25 |
1180 |
360 |
|
|
250 |
450 |
425 |
370 |
332 |
36 |
12-Φ30 |
1390 |
400 |
|
|
300 |
500 |
485 |
430 |
390 |
40 |
16-Φ30 |
1620 |
450 |
|
|
350 |
550 |
550 |
490 |
448 |
44 |
16-Φ34 |
1810 |
500 |
|
|
400 |
600 |
610 |
550 |
505 |
48 |
16-Φ34 |
1990 |
560 |
