Heavy-hammer type hydraulically controlled check butterfly valve
Keywords:
Valve Encyclopedia
Category:
- Product Description
-
Product Features
· The valve can automatically close by utilizing the potential energy of a heavy hammer.
·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 can be achieved.
· 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 as: weight-activated locking type (S) and weight-activated automatic pressure-holding type (B).
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 comprises 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. All valve bodies adopt a horizontal structure.
The valve shaft can adopt either a long or short shaft structure.
In a heavy-hammer-type automatic pressure-holding system, the accumulator serves to compensate for system pressure.
In the heavy-hammer pressure-holding and locking system, the accumulator serves to compensate for system pressure and unlock the locking cylinder.
The transmission hydraulic cylinder is equipped with a quick-close time adjustment valve, a slow-close time adjustment valve, and adjustable valves for both quick and slow closing angles.
The manual pump is used for system commissioning and for opening and closing valves under special operating conditions.
The hydraulic station, the electrical control box, and the valve body can be installed either as a single unit or separately. Typically, they are installed as a single unit.
The flow control valve is used for adjusting the valve opening time.
The control characteristics of solenoid directional valves in hydraulic systems are generally of the normally-closed type.
That is When the solenoid valve is energized, the butterfly valve opens; when de-energized, the butterfly valve closes. The reverse configuration works in the opposite manner: when the solenoid valve is de-energized, the butterfly valve opens; when energized, the butterfly valve closes. Conventionally, standard solenoid directional control valves are of the direct-action type. If a reverse-action type is required, this should be specified at the time of order placement.
When arranged horizontally, the transmission mechanism is typically installed in the forward direction. However, when space constraints at the installation site require it, 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 1–2).
DN400–1000mm Unit: mm
DN
PNMPa
L
L0
L1
L2
L3
L4
L5
L6
L7
H1
H2
H3
D
phi
n-d
n-d1
Quality
kilogram
mm
in
400
16
1.0
216
1107
527
650
341
420
90
900
995
370
417
900
565
515
16-φ28
6-φ26
1155
1.6
216
1107
527
650
341
420
90
900
995
370
417
900
580
525
16-φ31
6-φ26
1175
450
18
1.0
222
1143
552
680
352
420
90
900
995
400
417
900
615
565
20-φ28
6-φ26
1200
1.6
222
1143
552
680
352
420
90
900
995
400
417
900
640
585
20-φ31
6-φ26
1280
500
20
1.0
229
1212
582
710
391
500
100
1100
995
430
417
1100
670
620
20-φ28
6-φ26
1310
1.6
229
1212
582
710
391
500
100
1100
995
430
417
1100
715
650
20-φ34
6-φ26
1410
600
24
1.0
267
1335
651
780
439
540
110
1100
995
480
417
1100
780
725
20-φ31
6-φ30
1800
1.6
267
1335
651
780
439
540
110
1100
995
480
417
1100
840
770
20-φ37
6-φ30
1920
700
28
1.0
292
1484
728
850
517
680
120
1100
995
530
417
1100
895
840
24-φ31
6-φ30
2240
1.6
292
1484
728
850
517
680
120
1100
995
530
417
1100
910
840
24-φ37
6-φ30
2360
800
32
0.6
318
1681
799
940
585
760
145
1445
1080
600
455
1445
975
920
24-φ31
6-φ33
2540
1.0
318
1681
799
940
585
760
145
1445
1080
600
455
1445
1015
950
24-φ34
6-φ33
2565
1.6
318
1681
799
940
585
760
145
1445
1080
600
455
1445
1025
950
24-φ40
6-φ33
2700
900
36
1.0
330
1811
864
1000
650
800
150
1445
1080
660
455
1445
1115
1050
28-φ34
6-φ33
2780
1.6
330
1811
864
1000
650
800
150
1445
1080
660
455
1445
1125
1050
28-φ40
6-φ33
2940
1000
40
0.6
410
1956
929
1060
730
900
180
1445
1080
690
455
1445
1175
1120
28-φ31
6-φ36
3560
1.0
410
1956
929
1060
730
900
180
1445
1080
720
455
1445
1230
1160
28-φ37
6-φ36
3570
1.6
410
1956
929
1060
730
900
180
1445
1080
720
455
1445
1255
1170
28-φ43
6-φ36
3770
DN1200–2600mm
DN
PNMPa
L
L0
L1
L2
L3
L4
L5
L6
L7
H1
H2
H3
D
phi
n-d
n-d1
Quality
kilogram
mm
in
1200
48
0.6
470
2254
1083
1250
860
1050
200
2010
1150
830
550
2010
1405
1340
32-φ34
6-φ39
4050
1.0
470
2254
1083
1250
860
1050
200
2010
1150
850
550
2010
1455
1380
32-φ40
6-φ39
4265
1400
56
0.6
530
2554
1230
1390
998
1160
240
2010
1150
930
550
2010
1630
1560
36-φ37
6-φ42
4850
1.0
530
2554
1230
1390
998
1160
240
2010
1150
950
550
2010
1675
1590
36-φ43
6-φ42
5130
1600
64
0.6
600
2924
1419
1600
1145
1450
300
2290
1360
1035
550
2290
1830
1760
40-φ37
6-φ48
6520
1.0
600
2924
1419
1600
1145
1490
300
2290
1360
1080
550
2290
1915
1820
40-φ49
6-φ48
6760
1800
72
0.6
670
3147
1527
1710
1260
1600
350
2290
1360
1150
650
2290
2045
1970
44-φ40
6-φ48
9580
1.0
670
3147
1527
1710
1260
1600
350
2290
1360
1180
650
2290
2115
2020
44-φ49
6-Φ48
9760
2000
80
0.6
760
3454
1672
1880
1397
1780
380
2540
1580
1250
650
2540
2265
2180
48-φ43
6-φ48
10940
1.0
760
3454
1672
1880
1397
1780
380
2540
1580
1280
650
2540
2325
2230
48-φ49
6-φ48
11215
2200
88
0.6
770
3681
1784
1990
1512
1860
400
2540
1580
1360
650
2540
2475
2390
52-φ43
6-φ48
12280
1.0
770
3681
1784
1990
1512
1860
400
2540
1580
1400
650
2540
2550
2440
52-φ57
6-φ48
12600
2400
96
0.25
780
3955
1905
2110
1615
2040
420
2540
1580
1470
1000
2540
2605
2540
56-φ34
6-φ48
15100
0.6
780
3955
1905
2110
1615
2040
420
2540
1580
1470
1000
2540
2685
2600
56-φ43
6-φ48
15360
2600
104
0.25
790
4340
2125
2330
1780
2100
450
2540
1580
1580
1000
2540
2805
2740
60-φ34
6-φ48
17490
0.6
790
4340
2125
2330
1780
2100
450
2540
1580
1580
1000
2540
2905
2810
60-φ49
6-φ48
17780
Note:
1. The flange connection dimensions in the table comply with GB/17241.6 and GB/T9124.1.
2. The weights shown in the table are for reference only; the actual items shall prevail.
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