DU TUBE TO TUBE TUFTTING
ĐẦU NỐI THẲNG 2 HẠT BẮP
Installation Instructions
DK-Lok unions are designed to connect two individual lines of the same outside diameter size together in either fractional or metric in both single ferrule and double ferrule designs.
Product Features / Technical Specifications
Configuration | Tube Fitting
Tube to Tube Union
Construction | Tube Fitting
Double Ferrule
Material | Tube Fitting
316 Stainless Steel, Brass, Carbon Steel, Duplex, Super Duplex, Aluminum, Alloy 20
Hastelloy C276, Alloy 400, Alloy 600, Alloy 625, Alloy 825, Titanium Gr. 2, PTFE
Model/Series
DU Model
Series
DU Model
Type | Tube Fitting
Union
The DK-Lok DU is a(n) union compression tube fitting with a tube to tube union configuration, ss316 stainless steel body material, and double ferrule construction. This product is a(n) DU Model. DK-Lok tube fittings are designed using industrial codes and specifications with additional cutting-edge engineering on swaging action and sealing integrity. DK-Lok provides excellent leak-free sealing on high pressure gas, vacuum, impulse, thermal shock, heavy vibration, and many other stringent applications.
Material
Bar stock
Forging
Stainless Steel316
ASTM A276
ASTM A182 ASME SA182 JIS G3214
ASTM A479
ASME SA479
JIS G4303
Brass
ASTM B16 UNS C36000
ASTM B283 UNS C37700 JIS H3250 Alloy C3771
ASTM B453 UNS C35300
JIS H3250 Alloy C3604
Carbon Steel
ASTM A675 Gr.60-90
ASTM A105
JIS G4051 S20C - S48C
JIS G4051 S20C - S48C
Duplex
ASTM A276 S31803
ASTM A182 F51
ASTM A479 S31803
Super Duplex
ASTM A479 S32750
ASTM A182 F51
Aluminum
ASTM B211 Alloy 2024 T6
ASTM B247
Alloy 20
ASTM B473 UNS N08020
ASTM B462 UNS N08020
Hastelloy C276
ASTM B574 UNS N10276
ASTM B564 UNS N10276
Alloy 400
ASTM B164 UNS N04400
ASTM B564 UNS N04400
Alloy 600
ASTM B166 UNS N06600
ASTM B564 UNS N06600
Alloy 625
ASTM B446 UNS N06625
ASTM B564 UNS N06625
Alloy 825
ASTM B425 UNS N08825
ASTM B564 UNS N08825
Titanium Gr. 2
ASTM B348 Gr.2
ASTM B381 F3
PTFE
ASTM D1710
ASTM D3293
Connects fractional tube
Part No.
Tube O.D. D
E
Min.
Width across flat
A
B
l
L
h
H
in.
mm
in.
mm
in.
mm
DU-1
1/16
1.59
1.27
5/16
7.93
5/16
7.93
8.63
10.92
17.50
25.15
DU-2
1/8
3.17
2.28
7/16
11.11
7/16
11.11
12.70
15.24
22.35
35.56
DU-3
3/16
4.76
3.04
7/16
11.11
1/2
12.70
13.71
16.00
24.13
37.33
DU-4
1/4
6.35
4.82
1/2
12.70
9/16
14.28
15.24
17.78
26.16
40.89
DU-5
5/16
7.93
6.35
9/16
14.28
5/8
15.87
16.25
18.54
28.19
42.92
DU-6
3/8
9.52
7.11
5/8
15.87
11/16
17.46
16.76
19.30
30.22
44.95
DU-8
1/2
12.70
10.41
13/16
20.64
7/8
22.22
22.86
21.84
30.98
51.30
DU-10
5/8
15.87
12.70
15/16
23.81
1
25.40
24.38
21.84
31.75
52.07
DU-12
3/4
19.05
15.74
1-1/16
26.98
1-1/8
28.58
24.38
21.84
33.27
53.59
DU-14
7/8
22.22
18.28
1-3/16
30.16
1-1/4
31.75
25.90
21.84
35.05
55.37
DU-16
1
25.40
22.35
1-3/8
34.92
1-1/2
38.10
31.24
26.41
40.38
64.77
DU-20
1-1/4
31.75
27.68
1-3/4
44.45
1-7/8
47.63
41.14
38.86
48.00
92.20
DU-24
1-1/2
38.10
33.90
2-1/8
53.97
2-1/4
57.15
50.03
45.21
53.60
107.95
DU-32
2
50.80
45.97
2-3/4
69.85
3
76.20
67.56
62.73
74.70
149.35
Connects metric tube
Tube O.D. D
E
Min.
Width across flat
A
B
l
L
h
H
DU-2M
2
1.7
12
12
12.9
15.3
22.4
35.6
DU-3M
3
2.4
12
12
12.9
15.3
22.1
35.3
DU-4M
4
2.4
12
12
13.7
16.1
24.1
37.3
DU-6M
6
4.8
14
14
15.3
17.7
26.2
41.0
DU-8M
8
6.4
15
16
16.2
18.6
28.2
43.2
DU-10M
10
7.9
18
19
17.2
19.5
31.0
46.2
DU-12M
12
9.5
22
22
22.8
22.0
31.0
51.2
DU-14M
14
11.1
24
25
24.4
22.0
31.8
52.0
DU-15M
15
11.9
24
25
24.4
22.0
31.8
52.0
DU-16M
16
12.7
24
25
24.4
22.0
31.8
52.0
DU-18M
18
15.1
27
30
24.4
22.0
33.3
53.5
DU-20M
20
15.9
30
32
26.0
22.0
34.8
55.0
DU-22M
22
18.3
30
32
26.0
22.0
34.8
55.0
DU-25M
25
21.8
35
38
31.3
26.5
40.4
65.0
DU-28M
28
21.8
41
46
36.6
36.6
43.4
85.0
DU-30M
30
26.2
46
50
39.7
39.3
49.5
92.9
DU-32M
32
28.6
46
50
42.0
41.6
51.3
97.3
DU-35M
35
31.5
50
55
42.1
41.7
51.3
97.6
DU-38M
38
33.7
55
60
49.4
47.9
58.4
113.6
DU-42M
42
36.8
60
65
49.3
47.8
58.4
113.4
DU-50M
50
45.2
70
76
67.2
62.5
74.7
149
DK-Lok Z Series fittings are dimensionally identical to DK-Lok Tube
Fittings.
To order Z series, insert Z in the standard DK-Lok tube fitting part number.
Examples: DUZ, DMCZ, DNZ