Gravel Sand Pumps for the Toughest Large-Particle Duty
A gravel sand pump is a single-casing, wide-passage centrifugal pump for continuously moving highly abrasive material whose particles are too large for an ordinary slurry pump. Choose it for river-sand mining, sand dredgers, river dredging, and slag transport in mining and smelting; the SGH variant is the high-head option.
Large-Particle & Abrasive Handling
The SG/SGH range moves 36–4320 m³/h against 5–80 m of head at 60–1200 kW, running at 720 / 990 / 1480 / 2960 r/min. Maximum passing particle scales with size — 82 mm on the 6/4, 127 mm on the 8/6, 178 mm on the 10/8, up to 254 mm on the 18/16. Wet-end parts are high-chromium alloy (hard-nickel options on flow parts), and the discharge can be positioned anywhere through 360°.
Pumps in This Range
SG Gravel Sand Pump — Solids to 254 mmSolids to 254 mm; single-casing, no liner to break.
SGH Gravel Sand Pump — High-Head BuildHigh-head build of the series, to 80 m.
Gravel Sand Pump Series
Frames run 6/4, 8/6, 10/8, 12/10, 14/12, 16/14 and 18/16, coded e.g. 6/4D-SG (inlet/outlet in inches, frame type, SG=gravel / SGH=high-head). Per-frame data, for example, the 8/6E-SG delivers 38–160 L/s at 10–48 m and 50–60% efficiency; the 12/10F-SG delivers 100–420 L/s at 11–58 m. Sealing is packing seal or vice-impeller (expeller) seal.
Choosing Between SG and SGH
Both builds pass the same coarse solids and share the same single-casing construction. The head required is what separates them.
| Build | Head | Capacity | Max particle | Typical duty |
|---|---|---|---|---|
| SG | 3.5–66 m | 10–1060 L/s | 82–254 mm | River sand extraction, channel desilting, slag transport |
| SGH | 18–80 m | 110–1000 L/s | 180–230 mm | Long discharge lines, reclamation fill, high static lift |
Typical Applications
River-sand mining, dredging vessels, river/channel dredging, coal, power, chemical and municipal works. Drive options span V-belt, elastic coupling, gear reducer, hydraulic coupling, variable-frequency and SCR speed control.
Why Single-Casing on Coarse Solids
A lined slurry pump has a replaceable wear shell inside a pressure casing. Gravel pumps do not, and that is deliberate: on material this coarse a liner is broken rather than worn, and once broken the load passes to a shell never designed to carry it. Single-casing construction puts the full wall thickness in wear-resistant metal instead.
Casing and cover are joined by a clamping arrangement rather than a bolted flange, so the discharge rotates through a full 360°. On a dredge or a fixed plant where the pipework geometry is already set, that is what makes the pump fit.
Shaft Sealing — Two Arrangements, Two Limits
- Packing seal — seal water pressure must be 35 kPa above the pump outlet pressure.
- Expeller seal — backflow head must not exceed 10 % of the pump total head, and shaft power rises by roughly 5 % because the expeller absorbs power.
Wear Material
A22 anti-wear cast steel (1200 MPa, HRC45) for casings; A23 (HB500–600) for high-erosion components; A05 high-chrome white iron (≥HRC62) at pH 5–12. Where a damaged casting cannot leave site, A25 (HB300–350) is weldable and can be repaired in the field — on a remote operation that can be worth more than the last increment of hardness.
Selection Support
Send particle size, required flow and head and slurry SG; we match frame, impeller and speed and confirm against clear-water characteristic curves for preliminary selection.
Send Your Enquiry
Gravel Sand Pumps for River Sand & Gravel Dredging
High-Head Gravel Sand Pump — SGH SeriesSG Gravel Sand PumpWholesale Gravel Sand Pumps — Bulk Supply| Model | Flow | Head | Max particle | Efficiency |
|---|---|---|---|---|
| 6/4D-SG | 10–70 L/s | 3.5–51 m | 82 mm | 30–50% |
| 8/6E-SG | 38–160 L/s | 10–48 m | 127 mm | 50–60% |
| 10/8S-SG | 60–272 L/s | 13–50 m | 178 mm | 45–65% |
| 12/10F-SG | 100–420 L/s | 11–58 m | 220 mm | 50–70% |
| Range | 36–4320 m³/h | 5–80 m | ≤254 mm | — |
Can your gravel and sand pumps handle large-particle sand and gravel continuously?
Yes. The SG/SGH range covers 36–4320 m³/h at 5–80 m head, 60–1200 kW, running at 720/990/1480/2960 r/min. Maximum passing particle size by pump size: 6/4 — 82 mm; 8/6 — 127 mm; 10/8 — 178 mm; 12/10 — 220 mm; 14/12 — 241 mm; 18/16 — 254 mm. Construction is single-casing with a wide flow passage and hard-nickel or high-chrome wet parts; the discharge can be positioned through 360°. Sealing is by packing or expeller, with V-belt, flexible coupling, gear, fluid-coupling, variable-frequency or thyristor drive.
Do you hold CE / EAC / ISO 9001, and can you export to the EU, Russia and the CIS?
Yes — ISO 9001/14001, CE (MD·EMC) and EAC 004/010. EAC certification is key for Russia and CIS customs clearance.
What are your lead time, MOQ and OEM / private-label options?
OEM and private-label are supported; MOQ and lead time are provided on request.
Manufacturer-direct supply · Technical pump-selection support · Export documentation on request.
