Malleable iron union (Ball-to-cone / ball-to-ball joint) is a detachable fitting with both female threaded connections. It consists of a tail or male part, a head or female part, and a union nut, with ball-to-cone joint or ball-to-ball joint.
Available size (Class 150)
| Size | A (mm) | Joint type | Ref. No. |
|---|---|---|---|
| 1/4″ / DN8 / 13.7mm | 36.5 | Ball-to-cone / ball-to-ball | M8801 (UL) |
| 3/8″ / DN10 / 17.1mm | 41.0 | Ball-to-cone / ball-to-ball | M8802 (UL) |
| 1/2″ / DN15 / 21.3mm | 43.5 | Ball-to-cone / ball-to-ball | M8803 (UL/FM) |
| 3/4″ / DN20 / 26.7mm | 49.5 | Ball-to-cone / ball-to-ball | M8804 (UL/FM) |
| 1″ / DN25 / 33.4mm | 52.5 | Ball-to-cone / ball-to-ball | M8805 (UL/FM) |
| 1-1/4″ / DN32 / 42.2mm | 57.5 | Ball-to-cone / ball-to-ball | M8806 (UL/FM) |
| 1-1/2″ / DN40 / 48.3mm | 61.0 | Ball-to-cone / ball-to-ball | M8807 (UL/FM) |
| 2″ / DN50 / 60.3mm | 70.0 | Ball-to-cone / ball-to-ball | M8808 (UL/FM) |
| 2-1/2″ / DN65 / 73mm | 82.0 | Ball-to-cone / ball-to-ball | M8809 (UL/FM) |
| 3″ / DN80 / 88.9mm | 89.0 | Ball-to-cone / ball-to-ball | M8810 (UL/FM) |
| 4″ / DN100 / 114.3mm | 98.0 | Ball-to-cone / ball-to-ball | M8811 (FM) |
| 6″ / DN150 / 168.3mm | 132.0 | Ball-to-cone / ball-to-ball | M8813 (ISO) |
Available size (Class 300)
| Size | A (mm) | Joint type | Ref. No. |
|---|---|---|---|
| 1/8″ / DN6 / 10.3mm | 32.0 | Ball-to-cone / ball-to-ball | M8800-300 (ISO) |
| 1/4″ / DN8 / 13.7mm | 39.5 | Ball-to-cone / ball-to-ball | M8801-300 (ISO) |
| 3/8″ / DN10 / 17.1mm | 43.5 | Ball-to-cone / ball-to-ball | M8802-300 (ISO) |
| 1/2″ / DN15 / 21.3mm | 46.0 | Ball-to-cone / ball-to-ball | M8803-300 (UL) |
| 3/4″ / DN20 / 26.7mm | 54.0 | Ball-to-cone / ball-to-ball | M8804-300 (UL) |
| 1″ / DN25 / 33.4mm | 58.5 | Ball-to-cone / ball-to-ball | M8805-300 (UL) |
| 1-1/4″ / DN32 / 42.2mm | 67.5 | Ball-to-cone / ball-to-ball | M8806-300 (UL) |
| 1-1/2″ / DN40 / 48.3mm | 72.5 | Ball-to-cone / ball-to-ball | M8807-300 (UL) |
| 2″ / DN50 / 60.3mm | 82.0 | Ball-to-cone / ball-to-ball | M8808-300 (UL) |
| 2-1/2″ / DN65 / 73mm | 84.5 | Ball-to-cone / ball-to-ball | M8809-300 (UL) |
| 3″ / DN80 / 88.9mm | 104.0 | Ball-to-cone / ball-to-ball | M8810-300 (UL) |
| 4″ / DN100 / 114.3mm | 113.5 | Ball-to-cone / ball-to-ball | M8811-300 (ISO) |
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