Product Overview:
Pneumatic concealed rod knife gate valve | Concealed plate knife gate valve is a new variety of gate valve, with small volume, light weight, lightweight and material saving. It is an ideal product in industries such as sewage, coal slurry, syrup, mud, air, slag water mixture, water supply, papermaking, mining, etc.
Knife gate valves use metal to metal hard seals or metal to rubber soft seals. During the opening and closing process, the gate and sealing surface are designed with special features, resulting in minimal friction and durability.
The upper seal of this type of knife shaped gate breaks through the conventional sealing form by adopting an upper cover structure, which changes the upper seal from a large rectangular seal to a small circular seal, greatly improving the sealing performance. On the basis of the circular seal, the advanced floating seal currently used internationally has been replaced with an area based circular seal, greatly improving the sealing performance. On the basis of circular sealing, the advanced floating sealing structure currently used internationally has been adopted, which enables the upper seal to reach the same lifespan as the pipeline, thereby improving the overall service life of the valve.
After installing a sealing device on the top of the handwheel, this type of gate valve can keep all the moving parts of the valve in a closed state, and the screw drive of the gate and valve stem will not get stuck due to dry lubricating oil.
Especially suitable for long-term normal operation in harsh environments with dust and dryness. Note: It can be designed and produced according to the environment and requirements of the user, suitable for installation and use by the user.
Product standard:
Design and Manufacturing: JB/T8691-1998
Structural length: GB/T15188.2-94
Flange connection: GB/T9113.1-2000 JB/T79-94
Testing and Acceptance: GB/T13927-92
Pneumatic device parameters:
1. Single or dual control solenoid valve (available in 24V, 220V and other voltage options, explosion-proof solenoid valve can be selected if necessary)
2. Proximity switch
3. Triple components for air source treatment (including pressure reducing valve, filter, and oil mist device)
4. Electric/pneumatic valve positioner (for regulating type)
Material of parts:
| Valve body, upper cover |
Carbon steel, stainless steel |
| valve plate |
stainless steel |
| 阀杆 |
stainless steel |
| sealing ring |
Rubber, PTFE, stainless steel, hard alloy
|
Performance parameters:
| Nominal Pressure |
PN |
| Shell Test |
1.5XPN |
| Sealing Test |
1.1XPN |
| Operating Temperature |
Rubber ≤ 80 ℃ PTFE seal ≤ 180 ℃ Hard seal ≤ 425 ℃ |
| Applicable Medium |
Pulp, sewage, gas, etc |
Connection size:
|
Nominal Pressure
|
DN
|
L
|
D1
|
D2
|
H
|
A
|
|
C
|
D
|
Z-M
|
Electric installation model
|
|
0.6MPa
|
50
|
48
|
90
|
110
|
600
|
215
|
125
|
318
|
197
|
4-M12
|
DZ10
|
|
65
|
48
|
110
|
130
|
670
|
215
|
125
|
318
|
197
|
4-M12
|
DZ10
|
|
80
|
51
|
125
|
150
|
680
|
215
|
125
|
318
|
197
|
4-M16
|
DZ10
|
|
100
|
51
|
145
|
170
|
700
|
215
|
125
|
318
|
197
|
4-M16
|
DZ10
|
|
125
|
57
|
175
|
200
|
720
|
215
|
125
|
318
|
197
|
8-M16
|
DZ10
|
|
150
|
57
|
200
|
225
|
790
|
215
|
125
|
318
|
197
|
8-M16
|
DZ10
|
|
200
|
70
|
225
|
280
|
850
|
215
|
175
|
363
|
197
|
R-M16
|
D715
|
|
250
|
70
|
310
|
335
|
1100
|
215
|
125
|
363
|
197
|
12-M16
|
DZ20
|
|
300
|
76
|
362
|
395
|
1180
|
215
|
125
|
363
|
197
|
12-M20
|
DZ20
|
|
350
|
76
|
412
|
445
|
1280
|
215
|
125
|
363
|
197
|
12-M20
|
DZ30
|
|
400
|
89
|
462
|
495
|
1460
|
215
|
125
|
363
|
197
|
16-M20
|
DZ45
|
|
450
|
89
|
518
|
550
|
1600
|
240
|
235
|
437
|
227
|
16-M20
|
DZ45
|
|
500
|
114
|
568
|
600
|
1800
|
240
|
235
|
437
|
227
|
16-M20
|
DZ60
|
|
600
|
114
|
670
|
705
|
2100
|
240
|
235
|
437
|
227
|
20-M22
|
DZ60
|
|
700
|
127
|
775
|
810
|
2300
|
274
|
260
|
526
|
283
|
24-M22
|
DZ90
|
|
800
|
127
|
880
|
920
|
2500
|
274
|
260
|
526
|
283
|
24-M27
|
DZ120
|
|
900
|
154
|
980
|
1020
|
2700
|
319
|
295
|
554
|
309
|
27-M27
|
DZ180
|
|
1000
|
165
|
1080
|
1120
|
2900
|
319
|
295
|
554
|
309
|
28-M27
|
DZ250
|
|
1200
|
190
|
1295
|
1340
|
2300
|
319
|
295
|
554
|
309
|
32-M30
|
DZ250
|
|
1.0 MPa
|
50
|
48
|
100
|
125
|
600
|
215
|
125
|
318
|
197
|
4-M16
|
DZ10
|
|
65
|
48
|
120
|
145
|
670
|
215
|
125
|
318
|
197
|
4-M16
|
DZ10
|
|
80
|
51
|
135
|
160
|
680
|
215
|
125
|
318
|
197
|
4-M16
|
DZ10
|
|
100
|
51
|
155
|
180
|
700
|
215
|
125
|
318
|
197
|
8-M16
|
DZ10
|
|
125
|
57
|
185
|
210
|
720
|
215
|
125
|
318
|
197
|
8-M16
|
DZ10
|
|
150
|
57
|
210
|
240
|
790
|
215
|
125
|
363
|
197
|
8-M20
|
DZ15
|
|
200
|
70
|
265
|
295
|
850
|
215
|
125
|
363
|
197
|
8-M20
|
DZ20
|
|
250
|
70
|
320
|
350
|
1140
|
215
|
125
|
363
|
197
|
12-M20
|
DZ20
|
|
300
|
76
|
368
|
400
|
1180
|
215
|
125
|
363
|
197
|
12-M20
|
DZ30
|
|
350
|
76
|
428
|
460
|
1280
|
215
|
125
|
363
|
197
|
16-M20
|
DZ30
|
|
400
|
89
|
482
|
515
|
1460
|
240
|
235
|
437
|
227
|
16-M22
|
DZ45
|
|
450
|
89
|
532
|
565
|
1600
|
240
|
235
|
437
|
227
|
20-M22
|
DZ45
|
|
500
|
114
|
585
|
620
|
1800
|
240
|
235
|
437
|
227
|
20-M22
|
DZ60
|
|
600
|
114
|
685
|
725
|
2100
|
240
|
235
|
437
|
277
|
20-M27
|
DZ60
|
|
700
|
127
|
800
|
840
|
2300
|
274
|
260
|
526
|
283
|
24-M27
|
DZ120
|
|
800
|
127
|
898
|
950
|
2500
|
319
|
295
|
554
|
309
|
24-M30
|
DZ180
|
|
900
|
154
|
1005
|
1050
|
2700
|
319
|
295
|
554
|
309
|
28-M30
|
DZ180
|
|
1000
|
165
|
1115
|
1160
|
2900
|
319
|
295
|
554
|
309
|
28-M30
|
DZ250
|
|
1200
|
190
|
1325
|
1380
|
3400
|
319
|
295
|
554
|
309
|
32-M36
|
DZ258
|