Replacing the traditional wedge disc with the parallel floating round disc sealing assembly, the parallel double disc gate valve exhibits its great superiority and greatly improves its sealing performance and prolongs its service life. Featured by fast opening and closing, labor saving, low vibration, safe operation and simple maintenance, it is very suitable for shut-off or discharging in transportation pipes of gas and liquid media, and shows its excellence especially in shut-off and remote automatic control in transportation pipes of gas and liquid media. With no leakage, it can meet the requirements of high temperature, high pressure, explosion-proof and anticorrosive service conditions. It is widely applied in such industries as petroleum, chemical industry, oil refining, light industry, metallurgy, electric power, etc. With successful application and excellent service over the years, it has won trust and comment from users.
1. Nominal pressure (MPa): 1.6, 2.0, 2.5, 4.0, 5.0, 6.3, 10.0, 11.0
2. Applicable temperature: low temperature type (-46~+345ºC), normal temperature type (-29~+250ºC), medium temperature type (-29~+425ºC), high temperature type (+425~+600ºC)
3. Applicable media: water, steam, gas, oil
4. Bonnet type: standard type (-20~+300ºC), high temperature (cooling fin) type (+300~+600ºC) low temperature (extension) type (-60~-20ºC)
5. Valve shut-off class: hard seal V class, soft seal VI class (Hard seal VI class is for special order.) conforming to GB/T4213 and ASME B16.104
Â
Standard
Design and
manufacture
Length of the
structure
Flange size
Pressure
temperature rating
Inspection
and testing
Leakage level
National Standards
With industry standardsGB/T 12234
GB/T 19672Â Â Â Â Â Â Â Â GB/T12221
JB/T 79 GB/T 9113
HG/T 20592~20635
SH 3406GB/T 9124
GB/T 12224JB/T 9092
GB/T 13927GB/T4213
American StandardAPI 6D
API 600ASME B16.10
API 6DASME B16.5
ASME B16.47ASME B16.34
API 598
API 6DANSI/FCI 70-2
ASME B16.104
Nominal
Pressure
Nominal diameter
Face-to-face
dimensions
Flange connection dimensionsRFÂ Â Â Â Â Â Sealing surface
Opening
height
(kg)
Reference
weight
NPS
DN
L
D
K
n-L
C
d
f1
H
Class
15011/2
40
165
125
98.4
4-16
15.9
73.0
2
630
42
2
50
178
150
120.7
4-18
17.5
92.1
2
640
45
21/2
65
190
180
139.7
4-18
20.7
104.8
2
690
55
3
80
203
190
152.4
4-18
22.3
127.0
2
750
68
4
100
229
230
190.5
8-18
22.3
157.2
2
780
80
5
125
254
255
215.9
8-22
22.3
185.7
2
850
110
6
150
267
280
241.3
8-22
23.9
215.9
2
940
130
8
200
292
345
298.5
8-22
27.0
269.9
2
1120
220
10
250
330
405
362.0
12-26
28.6
323.8
2
1330
270
12
300
356
485
431.8
12-26
30.2
381.0
2
1530
370
14
350
381
535
476.3
12-30
33.4
412.8
2
1710
510
16
400
406
595
539.8
16-30
35.0
469.9
2
1880
650
18
450
432
635
577.9
16-33
38.1
533.4
2
2160
1150
20
500
457
700
635.0
20-33
41.3
584.2
2
2360
1380
24
600
508
815
749.3
20-36
46.1
692.2
2
2660
1520
28
700
610
835
795.3
40-22
43.0
762
2
3350
2390
32
800
660
940
900.1
48-22
44.6
864
2
3860
2890
36
900
711
1055
1009.6
44-26
50.9
972
2
4280
3620
Nominal
Pressure
Nominal diameter
Face-to-face
dimensions
Flange connection dimensionsRFÂ Â Â Â Â Â Sealing surface
Opening
height
(kg)
Reference
weight
NPS
DN
L
D
K
n-L
C
d
f1
H
Class
30011/2
40
190
155
114.3
4-22
19.1
73.0
2
640
45
2
50
216
165
127.0
8-18
20.7
92.1
2
650
50
21/2
65
241
190
149.2
8-22
23.9
104.8
2
690
70
3
80
283
210
168.3
8-22
27.0
127.0
2
750
80
4
100
305
255
200.0
8-22
30.2
157.2
2
800
100
5
125
381
280
235.0
8-22
33.4
185.7
2
910
180
6
150
403
320
269.9
12-22
35.0
215.9
2
1000
210
8
200
419
380
330.2
12-26
39.7
269.9
2
1160
250
10
250
457
445
387.4
16-30
46.1
323.8
2
1350
420
12
300
502
520
450.8
16-33
49.3
381.0
2
1620
590
14
350
762
585
514.4
20-33
52.4
412.8
2
1820
870
16
400
838
650
571.5
20-36
55.6
469.9
2
1930
1180
18
450
914
710
628.6
24-36
58.8
533.4
2
2150
1380
20
500
991
775
685.8
24-36
62.0
584.2
2
2350
1980
24
600
1143
915
812.8
24-42
68.3
692.2
2
3060
2380
28
700
1346
920
857.2
36-36
87.4
787
2
3400
3300
32
800
1524
1055
977.9
32-42
101.6
902
2
4400
6400
36
900
1727
1170
1089
32-45
101.6
1010
2
--
--
Nominal
Pressure
Nominal diameter
Face-to-face
dimensions
Â
Flange connection dimensionsRFÂ Â Â Â Â Â Sealing surface
Opening
height
(kg)
Reference
weight
NPS
DN
L
D
K
n-L
C
RF
RJ
H
RF
RJ
d
f1
P
E
Class
60011/2
40
241
241
155
114.3
4-22
22.3
73.0
7
90.5
6.35
650
60
2
50
292
295
165
127.0
8-18
25.4
92.1
7
108
7.92
650
70
21/2
65
330
333
190
149.2
8-22
28.6
104.8
7
127
7.92
710
95
3
80
356
359
210
168.3
8-22
31.8
127.0
7
146
7.92
765
110
4
100
432
435
275
215.9
8-26
38.1
157.2
7
175
7.92
820
180
5
125
508
511
330
266.7
8-30
44.5
185.7
7
210
7.92
960
270
6
150
559
562
355
292.1
12-30
47.7
215.9
7
241
7.92
1050
330
8
200
660
664
420
349.2
12-33
55.6
269.9
7
302
7.92
1250
620
10
250
787
791
510
431.8
16-36
63.5
323.8
7
356
7.92
1450
980
12
300
838
841
560
489.0
20-36
66.7
381.0
7
413
7.92
1720
1360
14
350
889
892
605
527.0
20-39
69.9
412.8
7
457
7.92
2040
1720
16
400
991
994
685
603.2
20-42
76.2
469.9
7
508
7.92
2150
2150
18
450
1092
1095
745
654.0
20-45
82.6
533.4
7
575
7.92
2320
2980
20
500
1194
1200
815
723.9
24-45
88.9
584.2
7
635
9.52
2650
3400
24
600
1397
1407
940
838.2
24-51
101.6
692.2
7
749
11.13
3150
4700
Â
The Z42 model parallel double disc gate valve developed by our company is a new generation fast shut-off gate valve that is independently designed and successfully researched and developed after introducing and absorbing advanced technologies from abroad. The pneumatic parallel double disc gate valve has been identified as a High-tech Product in Zhejiang Province, and been granted many national patents (patent No.: ZL2010 1 0282929.5, ZL2010 1 0246138.1). The product has been checked to be up to standard by the inspection center designated by General Administration of Quality Supervision, Inspection and Quarantine of the Peopleˇs Republic of China. We have also been issued the manufacturing license of special equipment (pressure pipe parts) of the Peopleˇs Republic of China, and been fire-safe certified to API 6FA by TUV SUD.
Replacing the traditional wedge disc with the parallel floating round disc sealing assembly, the parallel double disc gate valve exhibits its great superiority and greatly improves its sealing performance and prolongs its service life. Featured by fast opening and closing, labor saving, low vibration, safe operation and simple maintenance, it is very suitable for shut-off or discharging in transportation pipes of gas and liquid media, and shows its excellence especially in shut-off and remote automatic control in transportation pipes of gas and liquid media. With no leakage, it can meet the requirements of high temperature, high pressure, explosion-proof and anticorrosive service conditions. It is widely applied in such industries as petroleum, chemical industry, oil refining, light industry, metallurgy, electric power, etc. With successful application and excellent service over the years, it has won trust and comment from users.
1. Nominal pressure (MPa): 1.6, 2.0, 2.5, 4.0, 5.0, 6.3, 10.0, 11.0
2. Applicable temperature: low temperature type (-46~+345ºC), normal temperature type (-29~+250ºC), medium temperature type (-29~+425ºC), high temperature type (+425~+600ºC)
3. Applicable media: water, steam, gas, oil
4. Bonnet type: standard type (-20~+300ºC), high temperature (cooling fin) type (+300~+600ºC) low temperature (extension) type (-60~-20ºC)
5. Valve shut-off class: hard seal V class, soft seal VI class (Hard seal VI class is for special order.) conforming to GB/T4213 and ASME B16.104
Â
Standard
Design and
manufacture
Length of the
structure
Flange size
Pressure
temperature rating
Inspection
and testing
Leakage level
National Standards
With industry standardsGB/T 12234
GB/T 19672Â Â Â Â Â Â Â Â GB/T12221
JB/T 79 GB/T 9113
HG/T 20592~20635
SH 3406GB/T 9124
GB/T 12224JB/T 9092
GB/T 13927GB/T4213
American StandardAPI 6D
API 600ASME B16.10
API 6DASME B16.5
ASME B16.47ASME B16.34
API 598
API 6DANSI/FCI 70-2
ASME B16.104
Nominal
Pressure
Nominal diameter
Face-to-face
dimensions
Flange connection dimensionsRFÂ Â Â Â Â Â Sealing surface
Opening
height
(kg)
Reference
weight
NPS
DN
L
D
K
n-L
C
d
f1
H
Class
15011/2
40
165
125
98.4
4-16
15.9
73.0
2
630
42
2
50
178
150
120.7
4-18
17.5
92.1
2
640
45
21/2
65
190
180
139.7
4-18
20.7
104.8
2
690
55
3
80
203
190
152.4
4-18
22.3
127.0
2
750
68
4
100
229
230
190.5
8-18
22.3
157.2
2
780
80
5
125
254
255
215.9
8-22
22.3
185.7
2
850
110
6
150
267
280
241.3
8-22
23.9
215.9
2
940
130
8
200
292
345
298.5
8-22
27.0
269.9
2
1120
220
10
250
330
405
362.0
12-26
28.6
323.8
2
1330
270
12
300
356
485
431.8
12-26
30.2
381.0
2
1530
370
14
350
381
535
476.3
12-30
33.4
412.8
2
1710
510
16
400
406
595
539.8
16-30
35.0
469.9
2
1880
650
18
450
432
635
577.9
16-33
38.1
533.4
2
2160
1150
20
500
457
700
635.0
20-33
41.3
584.2
2
2360
1380
24
600
508
815
749.3
20-36
46.1
692.2
2
2660
1520
28
700
610
835
795.3
40-22
43.0
762
2
3350
2390
32
800
660
940
900.1
48-22
44.6
864
2
3860
2890
36
900
711
1055
1009.6
44-26
50.9
972
2
4280
3620
Nominal
Pressure
Nominal diameter
Face-to-face
dimensions
Flange connection dimensionsRFÂ Â Â Â Â Â Sealing surface
Opening
height
(kg)
Reference
weight
NPS
DN
L
D
K
n-L
C
d
f1
H
Class
30011/2
40
190
155
114.3
4-22
19.1
73.0
2
640
45
2
50
216
165
127.0
8-18
20.7
92.1
2
650
50
21/2
65
241
190
149.2
8-22
23.9
104.8
2
690
70
3
80
283
210
168.3
8-22
27.0
127.0
2
750
80
4
100
305
255
200.0
8-22
30.2
157.2
2
800
100
5
125
381
280
235.0
8-22
33.4
185.7
2
910
180
6
150
403
320
269.9
12-22
35.0
215.9
2
1000
210
8
200
419
380
330.2
12-26
39.7
269.9
2
1160
250
10
250
457
445
387.4
16-30
46.1
323.8
2
1350
420
12
300
502
520
450.8
16-33
49.3
381.0
2
1620
590
14
350
762
585
514.4
20-33
52.4
412.8
2
1820
870
16
400
838
650
571.5
20-36
55.6
469.9
2
1930
1180
18
450
914
710
628.6
24-36
58.8
533.4
2
2150
1380
20
500
991
775
685.8
24-36
62.0
584.2
2
2350
1980
24
600
1143
915
812.8
24-42
68.3
692.2
2
3060
2380
28
700
1346
920
857.2
36-36
87.4
787
2
3400
3300
32
800
1524
1055
977.9
32-42
101.6
902
2
4400
6400
36
900
1727
1170
1089
32-45
101.6
1010
2
--
--
Nominal
Pressure
Nominal diameter
Face-to-face
dimensions
Â
Flange connection dimensionsRFÂ Â Â Â Â Â Sealing surface
Opening
height
(kg)
Reference
weight
NPS
DN
L
D
K
n-L
C
RF
RJ
H
RF
RJ
d
f1
P
E
Class
60011/2
40
241
241
155
114.3
4-22
22.3
73.0
7
90.5
6.35
650
60
2
50
292
295
165
127.0
8-18
25.4
92.1
7
108
7.92
650
70
21/2
65
330
333
190
149.2
8-22
28.6
104.8
7
127
7.92
710
95
3
80
356
359
210
168.3
8-22
31.8
127.0
7
146
7.92
765
110
4
100
432
435
275
215.9
8-26
38.1
157.2
7
175
7.92
820
180
5
125
508
511
330
266.7
8-30
44.5
185.7
7
210
7.92
960
270
6
150
559
562
355
292.1
12-30
47.7
215.9
7
241
7.92
1050
330
8
200
660
664
420
349.2
12-33
55.6
269.9
7
302
7.92
1250
620
10
250
787
791
510
431.8
16-36
63.5
323.8
7
356
7.92
1450
980
12
300
838
841
560
489.0
20-36
66.7
381.0
7
413
7.92
1720
1360
14
350
889
892
605
527.0
20-39
69.9
412.8
7
457
7.92
2040
1720
16
400
991
994
685
603.2
20-42
76.2
469.9
7
508
7.92
2150
2150
18
450
1092
1095
745
654.0
20-45
82.6
533.4
7
575
7.92
2320
2980
20
500
1194
1200
815
723.9
24-45
88.9
584.2
7
635
9.52
2650
3400
24
600
1397
1407
940
838.2
24-51
101.6
692.2
7
749
11.13
3150
4700
Â
Hot Selling API 6D Rising Stem Cast Iron Gas Flat Gate Valve
Model NO.: deca
Actuator: Electric
Seal Surface: Parallel Gate Valve
Thread Position of Valve Rod: Inside Gate Valve
Usage: Regulation, Safety, Flow Control
Standard: ANSI
Application: Industrial Usage
Trademark: DECRRD
Transport Package: Wooden Case
Specification: custom
Origin: China
HS Code: 8481803190
Model NO.: deca
Actuator: Electric
Seal Surface: Parallel Gate Valve
Thread Position of Valve Rod: Inside Gate Valve
Usage: Regulation, Safety, Flow Control
Standard: ANSI
Application: Industrial Usage
Trademark: DECRRD
Transport Package: Wooden Case
Specification: custom
Origin: China
HS Code: 8481803190
The Z42 model parallel double disc gate valve developed by our company is a new generation fast shut-off gate valve that is independently designed and successfully researched and developed after introducing and absorbing advanced technologies from abroad. The pneumatic parallel double disc gate valve has been identified as a High-tech Product in Zhejiang Province, and been granted many national patents (patent No.: ZL2010 1 0282929.5, ZL2010 1 0246138.1). The product has been checked to be up to standard by the inspection center designated by General Administration of Quality Supervision, Inspection and Quarantine of the Peopleˇs Republic of China. We have also been issued the manufacturing license of special equipment (pressure pipe parts) of the Peopleˇs Republic of China, and been fire-safe certified to API 6FA by TUV SUD.