Mechanical Replacement Pump Seals & Pump Shaft Seal Kit | Boiler Supplies Armstrong Seal Kits & Shaft Sleeves | Boiler Supplies Armstrong Rebuild Kits for Models 4300, 4302 & 4312
*All OEM names and part numbers are used for reference purposes only. All of our products are aftermarket seal kits and parts*
Model 4300, 4302 & 4312
(outside balanced style seal for stuffing box design pumps)
Frame sizes 143 TC – 256 TC (1.125” seal)
Kit includes balanced 8B2 mechanical seal (975002-304), seal gaskets and case gaskets (426401-002, 426401-003, 426401-004, and 426401-006).
Model 4300 & 4302
(inside single spring seal rebuild kits include an original US Seal type E 8B2 balanced Mechanical Seal & case gaskets.
| Part # | Armstrong Model | Frame Size | Pump Group | Price | Qty | |
|---|---|---|---|---|---|---|
| 975002-304 | 4300 Series | 143 TC - 256 TC | 1 - 4 (1.125") | $689.95 | Add to Cart | |
| 975002-334 | 4300 Series | 284 TCS - 445 TCS | 5 - 20 (1.625") | $899.95 | Add to Cart |
© 2026 Power Plus International, Inc. d/b/a Boiler USA, All Rights Reserved. |
Back to Products
