Hydraulic-controlled check butterfly valve with accumulator
Keywords:
Valve Encyclopedia
Category:
- Product Description
-
Product Features
● Automatically closes the valve by relying on the energy stored in the accumulator.
·Reliable sealing and low flow resistance coefficient.
· It adopts a PLC intelligent control system, enabling various user-friendly operation interfaces such as text and touch screens.
· Remote and local control are both possible.
· It can perform coordinated operations with other pipeline equipment according to the predetermined procedure.
· Features adjustable fast and slow closing functions.
·Features shut-off and check functions.
· When shut down, it can achieve a slow-closing function, effectively eliminating water hammer hazards and safeguarding the safety of turbines, pumps, and pipeline systems.
Structural features
According to the control system, they are classified into conventional accumulator type (X) and accumulator-type locking type (XS).
It mainly consists of four components: the valve body, the actuator mechanism, the hydraulic station, and the electrical control box.
The valve body itself consists of components such as the valve body, butterfly disc, valve shaft, and sealing assembly.
The transmission mechanism primarily consists of interconnected and transmitting components such as hydraulic cylinders, rocker arms, support side plates, heavy hammers, levers, and locking cylinders. It serves as the main actuator for opening and closing valves using hydraulic power.
The hydraulic station includes components such as an oil pump unit, manual pump, accumulator, solenoid valve, relief valve, flow control valve, shut-off valve, hydraulic manifold block, and oil tank.
The manual pump is used for system commissioning and for opening and closing valves under special operating conditions.
The flow control valve is used for adjusting the valve opening time.
The transmission hydraulic cylinder is equipped with a quick-close time adjustment valve, a slow-close time adjustment valve, and a slow-close angle adjustment valve.
In the system, two accumulators serve as backups for each other and provide the primary power source for valve actuation.
The valve shaft can adopt either a long-short shaft structure.
Generally, a horizontal arrangement is adopted; however, a vertical arrangement can also be used upon user request.
The hydraulic station, the electrical control box, and the valve body can be installed either as a single unit or separately. When a vertical arrangement is adopted, all components are installed separately.
The control characteristics of solenoid directional valves in hydraulic systems are generally of the normally-open type.
That is: When the solenoid valve is energized, the butterfly valve opens; when the solenoid valve is de-energized, the butterfly valve closes. Conversely, if the system operates in reverse—meaning that when the solenoid valve is de-energized, the butterfly valve opens, and when it is energized, the butterfly valve closes—this is referred to as a reverse-action type. Conventionally, the standard solenoid directional control valves are of the forward-action type; if you require a reverse-action type, please specify this at the time of ordering.
When arranged horizontally, the transmission mechanism is typically installed in the forward direction. However, if site space is limited, a reverse installation—where the transmission unit is located on the opposite side of the valve body—can also be adopted according to user requirements (see Figures 7–8).
Main component materials
Nominal pressure
(MPa)
Sealing test
(MPa)
Strength test
(MPa)
Operating temperature (℃)
Applicable medium
The switching time is adjustable.
(S)
Valve closure angle
Quickly close
Slow close
0.25
0.275
0.375
X ≤ 135
H ≤ 300
Water, oil, and other non-corrosive liquids
1.2-60
70° ± 5
20° ± 5
0.6
0.66
0.9
1
1.1
1.5
1.6
1.76
2.4
DN
L
L0
L1
L2
L3
L4
L5
L6
H1
H2
H3
H4
Phi
n-d-Th
n-d1
Quality
mm
in
0.6
MPa
1.0
MPa
0.6MPa
1.0MPa
250
10
165
1012
380
406
648
One
One
553
250
138
525
263
335
350
12-φ20-M16
12-φ23-M20
2-φ22
520
300
12
178
1080
410
406
648
One
One
553
280
138
525
263
395
400
12-φ23-M20
12-φ23-M20
2-φ22
562
350
14
190
1142
443
406
648
One
400
553
300
138
525
263
445
460
12-φ23-M20
16-φ23-M20
2-φ22
653
400
16
216
1205
480
406
648
90
420
553
340
138
525
263
495
515
16-φ23-M20
16-φ28-M24
4-φ22
838
450
18
222
1267
518
406
648
90
420
553
370
138
525
263
550
565
16-φ23-M20
20-φ28-M24
4-φ22
914
500
20
229
1479
580
520
705
100
500
-620
400
240
740
-227
600
620
20-φ23-M20
20-φ28-M24
4-φ26
1097
600
24
267
1613
657
520
705
110
540
-620
460
240
740
-227
705
725
20-φ28-M24
20-φ31-M27
4-φ26
1320
700
28
292
1756
730
520
705
120
680
-620
540
240
740
-227
810
840
24-φ28-M24
24-φ31-M27
4-φ26
1817
800
32
318
1898
810
520
880
145
760
-526
580
320
720
-606
920
950
24-φ31-M27
24-φ34-M30
4-φ26
2323
900
36
330
1990
925
520
880
150
820
-526
630
320
720
-606
1020
1050
24-φ31-M27
28-φ34-M30
4-φ30
2621
1000
40
410
2265
990
520
880
180
900
-526
690
320
720
-606
1120
1160
28-φ31-M27
28-φ37-M33
4-φ30
3005
1200
48
470
2502
1140
520
990
200
1050
922
800
380
770
-330
1340
1380
32-φ34-M30
32-φ40-M36
4-φ39
3780
1400
56
530
2805
1297
520
990
260
1250
922
900
380
770
-330
1560
1590
36-φ37-M33
36-φ43-M39
4-φ42
4825
1600
64
600
3100
1429
556
1030
300
1490
1286
1040
450
915
-403
1760
1820
40-φ37-M33
40-φ49-M45
4-φ48
6505
1800
72
670
3336
1520
556
1030
350
1600
1286
1140
450
915
-403
1970
2020
44-φ40-M36
44-φ49-M45
4-φ48
8985
2000
80
760
3722
1707
600
1100
380
1780
1520
1240
540
1080
-520
2180
2230
48-φ43-M39
48-φ49-M45
4-φ48
10845
2200
88
770
3931
1819
600
1100
400
1860
1520
1340
540
1080
-520
2390
2440
52-φ43-M39
52-φ57-M52
4-φ56
12150
2400
96
780
4205
1940
650
1160
420
2040
1680
1460
620
1160
-640
2600
2650
56-φ43-M39
56-φ57-M52
4-φ56
14655
2600
104
790
4590
2160
650
1160
450
2100
1680
1560
620
1160
-640
2810
2850
60-φ49-M45
60-φ57-M52
4-φ56
17060
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Phone:+86-371-68122889
Email:zzsfmjt@126.com
Mobile phone:+86-13703990948
Fax:0371-68122899
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