Product Description
Armstrong Casing Gasket – Part No. 426401-006
Genuine Armstrong replacement casing gasket, Armstrong part number 426401-006, for Series 4380, 4280, 4030, 4300 pumps. Shown as item 101 on the Series 4380 drawing (parts list 6043.129 / 6043.130) – highlighted in the pictures above.
- Also sold as a gasket kit: 8426401-006.
Fits these Armstrong pumps
- Series 4380 (vertical in-line) – pump sizes 4 × 4 × 11½, 5 × 5 × 11½, 6 × 6 × 11½, 8 × 8 × 11½
- Drawing item: 101
- Series 4280 (close coupled end suction) – pump sizes 4 × 3 × 11½, 5 × 4 × 11½, 6 × 5 × 11½, 8 × 6 × 11½
- Drawing item: 101
- Series 4030 (base mounted end suction) – pump sizes 4 × 3 × 11½, 5 × 4 × 11½, 6 × 5 × 11½, 8 × 6 × 11½
- Drawing item: 101
- Series 4300 (vertical in-line) – pump sizes 4 × 4 × 11½, 5 × 5 × 11½, 6 × 6 × 11½, 8 × 8 × 11½
- Drawing item: 101
Other parts for this pump
Rebuilding a Series 4380 4 × 4 × 11½? These parts are often replaced at the same time:
| Item | Part | Armstrong part no. |
|---|---|---|
| 39 | Water slinger | 406622-000 |
| 40 | Stuffing box / adapter | 426741-011 |
| 40 | Stuffing box / adapter | 426741-031 |
| 43 | Motor washer | 927113-100 |
| 44 | Motor capscrew | 911121-108 |
| 57 | Male connector | 939001-114 |
| 59 | Flush line tubing | 997531-004 |
| 62 | Mechanical seal kit | 975000-982 |
| 62 | Mechanical seal kit | 9975001-813 |
| 62 | Mechanical seal kit | 9975001-613 |
| 62 | Mechanical seal kit | 9975001-817 |
| 62 | Mechanical seal kit | 9975001-818 |
| 70 | Shaft sleeve | 425869-001 |
| 71 | Shaft sleeve spacer | 425868-005 |
| 80 | Impeller | 426281-041 |
| 83 | Impeller washer | 425742-001 |
| 86 | Impeller capscrew | 911900-114 |
| 90 | Case wear ring | 426412-405 |
| 100 | Casing | 426119-011 |
| 100 | Casing | 426120-031 |
| 102 | Casing gauge plug | 937105-201 |
| 103 | Casing capscrew washer | 927117-100 |
| 104 | Casing capscrew | 911125-112 |
Not sure this is the right part?
Use our Armstrong Pump Parts Finder: choose Series 4380, your pump size and motor to see every part on the drawing. Or send us your pump’s nameplate details – call (416) 236-2338 or email sales@bramhambros.com. Bramham Bros is an authorized Armstrong dealer.
Product Videos
Custom Field
Brand Armstrong
Armstrong Part Number 426401-006
Part Type Gasket / O-Ring
Fits Series 4380 4 x 4 x 11-1/2, 5 x 5 x 11-1/2, 6 x 6 x 11-1/2, 8 x 8 x 11-1/2
Fits Series 4280 4 x 3 x 11-1/2, 5 x 4 x 11-1/2, 6 x 5 x 11-1/2, 8 x 6 x 11-1/2
Fits Series 4030 4 x 3 x 11-1/2, 5 x 4 x 11-1/2, 6 x 5 x 11-1/2, 8 x 6 x 11-1/2
Fits Series 4300 4 x 4 x 11-1/2, 5 x 5 x 11-1/2, 6 x 6 x 11-1/2, 8 x 8 x 11-1/2
Drawing Item 4030: item 101; 4280: item 101; 4300: item 101; 4380: item 101
Shipping cost: Inquire
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