Engine-driven mechanical diaphragm pump
A petrol or diesel engine driving a single or double diaphragm through a connecting rod, on a frame or trolley. The pump left in a trench for weeks with nothing to attend to.
Features
- Completely self-contained: it needs neither a compressor nor a supply, which is why it suits isolated trenches and remote works.
- Running dry between inflows causes no damage, so it can be left running rather than cycled on a float.
- The connecting rod and bearing assembly is the mechanical wear point, separate from the diaphragm, and both are serviceable on site.
- A trolley frame with pneumatic wheels is what makes it movable along a trench by one person.
- Suction hose has to be rigid or wire-reinforced, because the pump generates real vacuum and will collapse a soft hose.
Specifications
| Figure | Typical range | Unit | Why it matters |
|---|---|---|---|
| Maximum flow | 5 - 20 | m³/h | Sized to seepage rate, not to excavation volume. |
| Maximum solids size | 10 - 20 | mm | Handles grit a centrifugal pump cannot. |
| Suction lift | up to 7 | m | Requires reinforced suction hose. |
| Fuel tank capacity | 3 - 12 | l | Sets the unattended interval. |
| Dry weight | 40 - 120 | kg | Decides how it is moved along the trench. |