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The Haskel MS-12 is a compact 1/3 HP pneumatic pump from the M-Series, engineered to deliver up to 1,500 psi hydraulic pressure safely using only compressed air ideal for hazardous or spark-sensitive environments. Featuring a rugged stainless-steel body and stall-and-hold design, it locks in pressure without using additional air. The single-air-head construction with ~0.36 in per cycle flow ensures precise small-volume fluid control. Lightweight and maintenance-friendly, this pump is perfect for fluid transfer, calibration, clamping, and hydrostatic testing applications.
- Delivers a continuous 1,500 psi output pressure
- All-pneumatic operation no heat, sparks, or electrical needs
- Stall-and-hold valve enables pressure retention without airflow
- Compact single-head output with ~0.36 in displacement per cycle
- Stainless steel construction with optional wetted material variants
| Model / Part No. | MS-12 |
| Horsepower | 0.33 HP (pneumatic) |
| Nominal / Actual Ratio | 12 : 1 / ~14 : 1 |
| Max Pressure | 1,500 psi (continuous & intermittent) |
| Displacement per Cycle | 0.36 in ( 5.9 mL) |
| Max Flow Rate | ~234 in/min ( 3.8 L/min) |
| Max Cycle Speed | Up to 325 cpm |
| Air Drive Pressure | Up to 125 psi |
| Materials | Stainless steel body & piston; optional wetted seal materials |