How a progressive cavity pump transfers fluid through synchronized rotor-stator geometry.
A progressive cavity pump (PCP) is a positive displacement pump that uses a metallic helical rotor turning eccentrically inside a compliant elastomer stator. Each rotation creates a series of sealed cavities that continuously move the fluid from the suction port to the discharge port — producing smooth, pulse-free flow proportional to rotor speed.
Continuous, uniform discharge with stable output — no pulsation, no check valves.
Handles sludge, syrup, paint, adhesives and paste-like materials that stall other pump types.
Excellent dry suction without auxiliary priming or foot valves.
Wear-resistant design conveys water with sand, fibers and fine solid particles.
Flow is proportional to rotor speed — adjust speed to control flow precisely.
Stainless steel helical shaft — the core working element.
Elastomer-lined cavity that forms sealed chambers with the rotor.
Transfers torque and compensates the rotor's eccentric motion.
Media inlet/outlet channel with standard DIN / ANSI / ISO connections.
Matches speed and power to the application.
Flow is proportional to rotor speed. The number of stator stages determines the maximum output pressure.
| Stage | Pressure Range | Level |
|---|---|---|
| 1L | 0–6 bar | Single-stage, low pressure |
| 2S | 0–12 bar | Two-stage, medium pressure |
| 3S | 0–18 bar | Three-stage, medium-high pressure |
| 4S | 0–24 bar | Four-stage, high pressure (custom up to 60 bar+) |
Example: how to read a SINOR model number
| Segment | Meaning |
|---|---|
| SGP | Product series |
| 025 | Pump cavity size — larger number, higher maximum flow |
| 2S | Stator stages — 1L / 2S / 3S / 4S = pressure level |
