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The Haskel 4B-55 is a rugged, air-actuated liquid pump that delivers high-pressure performance without electricity or heat generation. With a 55:1 pressure ratio (actual ~63:1), it can produce continuous pressures up to 6,000?psi. Its pneumatic drive features stall-to-hold functionality, maintaining pressure without continuous air input. The compact design includes stainless steel wetted components and durable seals, making it ideal for hydrostatic testing, fluid transfer, and dosing in industrial settings.
- Runs on compressed air eliminates heat and spark risk
- Generates up to 6,000 psi continuous pressure
- Stall-to-hold function locks pressure without air flow
- Variable cycling rate for precise fluid control
- Stainless steel wetted parts with reliable seal design
| Model / Part No. | 4B-55 |
| Drive Power | 0.75 HP pneumatic motor |
| Nominal Ratio | 55:1 (actual ~63:1) |
| Max Continuous Pressure | 6,000 psi (414 bar) |
| Displacement/Cycle | 0.22 in (?3.6 mL) |
| Drive Air Pressure | 30 100 psi recommended |
| Wetted Materials | Stainless steel body; UHMWPE/Buna seals |