Product family · 26 models
Pump seals
Component and cartridge mechanical seals for water, process and chemical pumps, in the ISPL 2401–2430 series: spring, bellows, cartridge and double seals. They run in sugar, chemical, fertilizer, petrochemical and paper plants, among others.

Models
Compare the 26 models
| Model | Type | Rotation | Shaft size mmin | Pressure kg/cm²psi | Temperature °C°F |
|---|---|---|---|---|---|
| ISPL 2401 Conical Spring Seal | Single, unbalanced | LH/RH | 20–1000.79–3.94 | up to 10≤ 10up to 142≤ 142 | up to 100≤ 100up to 212≤ 212 |
| ISPL 2402 Multi-Spring Balanced Seal | Single, balanced | Bi-directional | 25–2000.98–7.87 | up to 20≤ 20up to 284≤ 284 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2403 Multi-Spring Unbalanced Seal | Single, unbalanced | Bi-directional | 25–1000.98–3.94 | up to 10≤ 10up to 142≤ 142 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2404 PTFE Bellows Seal, Single Spring | Single, balanced | Bi-directional | 25–1000.98–3.94 | up to 7≤ 7up to 100≤ 100 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2405 PTFE Bellows Seal, Multi-Spring | Single, balanced | Bi-directional | 25–1000.98–3.94 | up to 7≤ 7up to 100≤ 100 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2406 Straight Spring Seal | Single, balanced or unbalanced | LH/RH | 25–1000.98–3.94 | up to 20≤ 20up to 284≤ 284 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2407 Star Mechanical Seal with Keyway | Single, unbalanced | Bi-directional | 25–1000.98–3.94 | up to 10≤ 10up to 142≤ 142 | up to 100≤ 100up to 212≤ 212 |
| ISPL 2408 Double Mechanical Seal | Double, multi-spring | Bi-directional | 25–2000.98–7.87 | up to 10≤ 10up to 142≤ 142 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2409 Reverse Balanced Seal | Single, balanced | Bi-directional | 25–1000.98–3.94 | up to 20≤ 20up to 284≤ 284 | up to 100≤ 100up to 212≤ 212 |
| ISPL 2410 Heavy-Duty Seal | Single, balanced | Bi-directional | 25–2000.98–7.87 | up to 20≤ 20up to 284≤ 284 | up to 180≤ 180up to 356≤ 356 |
| ISPL 2411 Single-Spring Cup Seal | Single, unbalanced | Bi-directional | 20–1000.79–3.94 | up to 10≤ 10up to 142≤ 142 | up to 100≤ 100up to 212≤ 212 |
| ISPL 2412 Rubber Bellows Seal | Single, unbalanced | LH/RH | 20–1000.79–3.94 | up to 7≤ 7up to 100≤ 100 | up to 100≤ 100up to 212≤ 212 |
| ISPL 2413 Multi-Spring Cartridge Seal | Single cartridge | Bi-directional | 20–2000.79–7.87 | up to 15≤ 15up to 213≤ 213 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2414 Cartridge Seal | Single cartridge | Bi-directional | 20–2000.79–7.87 | up to 15≤ 15up to 213≤ 213 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2415 Welded Metal Bellows Seal | Single, balanced or unbalanced | Bi-directional | 25–1000.98–3.94 | up to 20≤ 20up to 284≤ 284 | up to 180≤ 180up to 356≤ 356 |
| ISPL 2416 [Name to confirm] | Single cartridge | Bi-directional | 20–2000.79–7.87 | up to 15≤ 15up to 213≤ 213 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2419 Boiler Feed Pump Seal | Single cartridge, balanced | Bi-directional | 25–2000.98–7.87 | up to 100≤ 100up to 1422≤ 1422 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2420 Accurate Seal | Single, multi-spring | LH/RH | 25–1000.98–3.94 | up to 7≤ 7up to 100≤ 100 | up to 100≤ 100up to 212≤ 212 |
| ISPL 2421 Springless Seal | Single, springless | Bi-directional | 40–3501.57–13.78 | up to 20≤ 20up to 284≤ 284 | up to 100≤ 100up to 212≤ 212 |
| ISPL 2423 Heat Exchanger Seal | Single, unbalanced | Bi-directional | 25–1000.98–3.94 | up to 10≤ 10up to 142≤ 142 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2424 Pressure Screen Double Seal | Double, multi-spring | Bi-directional | 25–2000.98–7.87 | up to 10≤ 10up to 142≤ 142 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2425 Pressure Screen Single Seal | Single, single spring | Bi-directional | 25–2000.98–7.87 | up to 10≤ 10up to 142≤ 142 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2426 Wave Spring Seal | Pusher, wave spring | Bi-directional | 25–1000.98–3.94 | up to 20≤ 20up to 284≤ 284 | up to 150≤ 150up to 302≤ 302 |
| ISPL 2427 Grinding Mill Double Cartridge Seal | Double cartridge | Bi-directional | 25–1000.98–3.94 | up to 20≤ 20up to 284≤ 284 | up to 180≤ 180up to 356≤ 356 |
| ISPL 2428 Balanced Wave Spring Seal | Single, balanced | Bi-directional | 25–1000.98–3.94 | up to 20≤ 20up to 284≤ 284 | up to 100≤ 100up to 212≤ 212 |
| ISPL 2430 Grinding Mill Seal | Double, single spring | Bi-directional | 25–1000.98–3.94 | up to 20≤ 20up to 284≤ 284 | up to 180≤ 180up to 356≤ 356 |
Limits in brackets are being confirmed by engineering. Each model page has the full specification and its datasheet.
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