Pneumatic hard seal butterfly valve

Ever-Power Machinery provides customers with high-qualityPneumatic hard seal butterfly valve product.Adhering to the tenet of "Quality First, Integrity Service", we will provide users with high-quality products and services with reasonable prices and reliable quality!


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D643H pneumatic hard seal butterfly valve
Product number:D643H
product description:

  Based on the introduction of foreign advanced technology, our factory adopts precision J-shaped elastic sealing ring and three-eccentric multi-layer metal hard sealing structure. It is widely used in metallurgy, electric power, petrochemical, and water supply and drainage with a medium temperature of ≤425℃. It is used for regulating flow and carrying and breaking fluid on industrial pipelines such as municipal construction.The valve adopts a triple eccentric structure. The valve seat and the sealing surface of the disc are made of different hardness and stainless steel. It has good corrosion resistance and long service life. This valve has two-way sealing function for military and postal services. The product meets the national GB/T13927-92 valve pressure Test accuracy.

Features:

1. This valve adopts a triple eccentric sealing structure, the valve seat and butterfly plate are almost wear-free, and it has a tighter and tighter sealing function.
2. The sealing ring is made of stainless steel, which has the dual advantages of metal hard seal and elastic seal. It has excellent sealing performance, corrosion resistance and long service life regardless of low temperature and high temperature.
3. The sealing surface of the disc plate adopts surfacing welding cobalt-based cemented carbide, which is wear-resistant and has a long service life.
4. The large-size butterfly plate adopts the quilted frame structure, which has high strength, large flow area and small flow resistance.
5. This valve has a two-way sealing function. It is not restricted by the flow direction of the medium during installation and is not affected by the spatial position. It can be installed in any direction.
6. The drive device can be installed in multiple positions (rotated by 90° or 180°), which is convenient for users to use.


The main technical parameters

Nominal through DN (mm)
50 ~ 2000
Nominal pharmacology PN (MPa)
0.6
1.0
1.6
2.5
Seal test (MPa)
0.66
1.1
1.76
2.75
Strength test (MPa)
0.9
1.5
2.4
3.75
proper temperature
Carbon steel: -29℃~425℃ Stainless steel: -40℃~650℃
Applicable medium
Water, air, natural gas, oil and weakly corrosive fluids
Leak rate
Comply with GB/T13927-92 standard
Driving method
Worm gear drive, electric, pneumatic, hydraulic

Material of main parts

Part Name
Ingredients
Valve body
WCB, alloy steel, stainless steel, QT450-10
Butterfly board
WCB, alloy steel, stainless steel, QT450-10
Valve shaft
2Cr13 stainless steel, alloy steel
Sealing ring
Stainless steel ring
filler
Flexible graphite

Adopt the standard

Manufacturing Standards
JB/T 8527-97
Flange standard
GB9113-2000
Structure length standard
GB12221-89
Inspection standards
GB / T 13927-92

D643H-10/16/25/Pneumatic hard seal butterfly valve main outline and connection dimensions                         (Unit: mm)

Nominal pass (DN)

Main dimensions
Flange size and bolt specifications
1.0MPa
1.6MPa
2.5MPa
L
H1
H
D
D1
n-Фd
D
D1
n-Фd
D
D1
n-Фd
50
108
350
112
165
125
4-18
165
125
4-18
165
125
4-18
65
112
370
115
185
145
4-18
185
145
4-18
185
145
8-18
80
114
380
120
200
160
4-18
200
160
8-18
200
160
8-18
100
127
420
138
220
180
8-18
220
180
8-18
235
190
8-22
125
140
460
164
250
210
8-18
250
210
8-18
270
220
8-26
150
140
555
175
285
240
8-22
285
240
8-22
300
250
8-26
200
152
760
200
340
295
8-22
340
295
12-22
360
310
12-26
250
165
830
243
395
350
12-22
405
355
12-26
425
370
12-30
300
178
895
250
445
400
12-22
460
410
12-26
485
430
16-30
350
190
950
280
505
460
16-22
520
470
12-26
555
490
16-33
400
216
1190
305
565
515
16-26
580
525
16-26
620
550
16-36
450
222
1255
350
615
565
20-26
640
585
16-30
670
600
20-36
500
229
1305
380
670
620
20-26
715
650
20-30
730
660
20-36
600
267
1340
445
780
725
20-30
840
770
20-33
845
770
20-39
700
292
1520
480
895
840
24-30
910
840
24-36
960
875
24-42
800
318
1710
530
1015
950
24-33
1025
950
24-39
1085
990
24-48
900
330
1810
580
1115
1050
28-33
1125
1050
28-39
1185
1090
28-48
1000
410
1960
650
1230
1160
28-36
1255
1170
28-42
1320
1210
28-56
1200
470
2250
760
1455
1380
32-39
1485
1390
32-48
1530
1420
32-56

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Address: Desheng Road, Yongjia County, Zhejiang Province