Series Big Caliber centerline Butterfly Valve Without Pins
（ Specification ： DN350 ～ 600 ）
 |
1.The valve disc is connected with the stem by rhombic hole. It maintains the stem intrinsic bearing capacity furthest without enlarging the diameter of the stem.
2.Following measures are taken to liminate the disc displacing because of its self-weight |
| A.The upper valve stem is connected with the nether stem by screw connecting rod through the combined supporting set. This structure makes the two stems and the disc a group. |
A.The upper valve stem is connected with the nether stem by screw connecting rod through the combined supporting set. This structure makes the two stems and the disc a group.
B.The axial hole below the disc is structure like steps. There is a combined supporting set that can underprop the disc. |
| C.There is a thrust bearing between the axis and the back end cover, which can efficiently eliminate the friction aroused by the disc and the stem weight, and also can make up the aperture. |
220D Series Small Caliber centerline Butterfly Valve Without Pins
（ Specification ： DN50 ～ 300 ）
 |
1.Simple design and good interchangeability with low price. |
2.Sealing of the stem is not distorted easily and possesses features such as excellent capacity of supporting, stability, and fastness. Leaking of stem can be avoided. |
3.Less rubber dosage of valve seat results low potential affection so that the torque size can be controlled in a proper scope. |
4.The stems of 220D/221D series adopt two-piece-design without pins. With simple and compact structure, they can be assembled and disassembled easily in job site; the disc with the function of automatic centering can be matched with the seat perfectly |
5.The valve seat with phenol aldehyde backrest possesses features of break-off preventing, stretch proofing and leak proofing as well as easy changing, etc. |
6.The sealing surface is incorporated with the backrest so that the amount of the valve seat is decreased. |
Specification D N |
H1 |
H2 |
H3 |
H4 |
D1 |
D2 |
Φ 1 |
Φ 2 |
Φ 3 |
Φ 4 |
Φ 5 |
L1 |
L2 |
B1 |
B |
Total Weight （ Kg ） |
(mm) |
(inch) |
50 |
2 〃 |
70 |
130 |
30 |
22 |
125 |
92 |
12.6 |
50 |
65 |
7 |
18 |
42 |
32 |
3 |
9 |
2.1 |
65 |
2.5 〃 |
76 |
143 |
30 |
22 |
145 |
106 |
12.6 |
50 |
65 |
7 |
18 |
45 |
47 |
3 |
9 |
2.4 |
80 |
3 〃 |
89 |
155 |
30 |
22 |
160 |
122 |
12.6 |
50 |
65 |
7 |
18 |
45 |
65 |
3 |
9 |
2.6 |
|
100 |
4 〃 |
104 |
170 |
30 |
- |
180 |
150 |
15.8 |
70 |
90 |
10 |
18 |
52 |
91 |
5 |
- |
4.5 |
125 |
5 〃 |
120 |
190 |
30 |
- |
210 |
177 |
19 |
70 |
90 |
10 |
18 |
55 |
112 |
5 |
- |
6.8 |
150 |
6 〃 |
132 |
210 |
30 |
- |
240 |
204 |
19 |
70 |
90 |
10 |
23 |
56 |
146 |
5 |
- |
8.3 |
200 |
8 〃 |
167 |
243 |
39 |
- |
295 |
260 |
22.1 |
102 |
125 |
12 |
23 |
61 |
194 |
5 |
- |
13 |
|
250 |
10 〃 |
202 |
282 |
39 |
- |
350 |
314 |
< 28.5 |
102 |
125 |
12 |
23 |
66 |
242 |
8 |
- |
18.8 |
355 |
26 |
300 |
12 〃 |
239 |
310 |
39 |
- |
400 |
370 |
< 31.7 |
125 |
150 |
14 |
23 |
77 |
292 |
8 |
- |
29 |
410 |
26 |
350 |
14 〃 |
265 |
345 |
39 |
- |
460 |
422 |
31.7 |
125 |
150 |
14 |
23 |
77 |
325 |
10 |
- |
39 |
470 |
26 |
400 |
16 〃 |
297 |
377 |
72 |
- |
515 > |
473 |
33.2 |
140 |
175 |
18 |
26 |
102 |
380 |
10 |
- |
58 |
525 |
30 |
450 |
18 〃 |
331 |
412 |
72 |
- |
565 |
526 |
38 |
140 |
175 |
18 |
26 |
114 |
428 |
10 |
- |
72 |
585 |
30 |
500 |
20 〃 |
361 |
440 |
82 |
- |
620 |
577 |
41.2 |
165 |
210 |
22 |
26 |
130.3 |
474 |
10 |
- |
128 |
650 |
33 |
600 |
24 〃 |
459 |
562 |
82 |
- |
725 |
693 |
50.7 |
254 |
300 |
18 |
30 |
152 |
573 |
16 |
- |
178 |
Note:The two figures in one case of the form separately represent the parameters under the pressure of PN1.0Mpa/PN1.6Mpa. |
