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malleable iron
Malleable Iron Unions
Class 150; 250; 300
Copper or Copper Alloy to Iron
Figure 552
Class 300 90° Elbow
Female Union 300lb. wsp
Size
Center to End
Unit Weight
Elbow
Union
Black
NPS
DN
in
mm
in
mm
lbs
kg
3
⁄
8
10
1
1
⁄
16
27
2
1
⁄
16
52
0.51
0.23
1
⁄
2
15
1
1
⁄
4
32
2
5
⁄
16
59
0.79
0.36
3
⁄
4
20
1
7
⁄
16
37
2
3
⁄
4
70
1.24
0.56
1
25
1
5
⁄
8
41
3
76
1.88
0.85
Figure 832
Dart Union Bronze to
Bronze Seat Union
Size
A
B
C
D
Unit Weight
Black
Galv.
NPS DN in
mm in
mm in
mm in
mm lbs
kg
lbs
kg
3
⁄
8
10 1
3
⁄
4
44
15
⁄
16
24 1
1
⁄
2
38 1
3
⁄
4
44 0.41 0.19 0.43 0.20
1
⁄
2
15 2
1
⁄
8
54 1
1
⁄
8
29 1
3
⁄
16
30 2 51 0.58 0.26 0.61 0.28
3
⁄
4
20 2
5
⁄
16
59 1
3
⁄
8
35 2
3
⁄
16
56 2
1
⁄
2
64 0.82 0.37 0.86 0.39
1 25 2
5
⁄
8
67 1
11
⁄
16
43 2
9
⁄
16
65 3 76 1.31 0.59 1.36 0.62
1
1
⁄
4
32 2
13
⁄
16
73 2
1
⁄
16
52 3
1
⁄
16
78 3
1
⁄
2
89 1.90 0.86 2.00 0.91
1
1
⁄
2
40 3 76 2
3
⁄
16
56 3
3
⁄
8
86 4 102 2.32 1.05 2.43 1.10
2 50 3
5
⁄
8
92 2
7
⁄
8
73 4
1
⁄
16
103 4
5
⁄
8
117 4.00 1.81 4.20 1.90
• Meets ASME B16.39 The standard union for most installations
3
⁄
8
– 2 NPS
(10 – 50 DN)
– 300lb
(136 kg)
steam working pressure at 450°F.
3
⁄
8
– 2 NPS
(10 – 50 DN)
– 600lb
(272 kg)
cold water, gas, or oil pressure - non-shock.
• Bronze Seat, on both sides of the joint. Resists corrosion.
• True bearing surfaces, unlike ordinary union seats.
• Bodies and nuts are high test air-refned malleable iron - generally superior to mild steel in most services.
• Can be repeatedly installed and removed.
• Straight way through. No cored parts to hold liquid or sediment.
• Extra heavy shoulder on swivel end and in the nut to stand pipe strains, vibration, and wrench abuse.
• Bronze Seat Ball Joint, with extra wide seating surfaces.
DART
A
B
C on Flat
D on Flat