WSP Series — Submersible Nonclog Sewage Pump
Portable submersible sewage pump rated 1–20 HP — nonclog design for drainage, municipal sewage, industrial effluent, and construction dewatering.
Key Features
- ▸Power range: 1 HP to 20 HP covering light portable to heavy-duty industrial duty
- ▸Delivery sizes: 50 mm, 80 mm, and 100 mm for varied flow requirements
- ▸Nonclog impeller design for reliable solids passage without blockage
- ▸IP-68 rated motor protection with thermal overload safeguard for continuous submerged duty
- ▸Motor: Two-pole continuous duty squirrel cage submersible induction motor, Insulation Class F
- ▸Motor body and strainer: SS-202; Shaft: SS-404; Casing and impeller: CI IS 210FG260 / SS-304 / SS-316
- ▸Double mechanical seal: SiC vs SiC / TC vs TC for zero-leakage reliability
- ▸Deep groove SKF ball bearings for extended service life
- ▸Available in single-phase 220V (1.0–2.0 HP) and three-phase 415V (1.0–20.0 HP) configurations
- ▸Optional agitator, cutter model, and float switch available on request
Key Benefits
- ▸Portable design enables rapid deployment across multiple sites with minimal setup time
- ▸Nonclog impeller eliminates costly unplanned stoppages from solid-induced blockages
- ▸IP-68 and thermal overload protection ensures uninterrupted operation in fully submerged conditions
- ▸Wide HP range means a single product family covers construction, industrial, and municipal requirements
- ▸ISO 9001:2015 certified manufacturing guarantees consistent quality and traceability
- ▸Low maintenance robust construction reduces total cost of ownership over the pump's service life
- ▸Optional agitator and cutter variants extend suitability to sludge and fibrous media handling
Technical Specifications
| Power Range | 1 HP to 20 HP |
| Delivery Size | 50 mm / 80 mm / 100 mm |
| Max Shut-Off Head | Up to 50 m |
| Max Flow Rate | Up to 3800 LPM |
| Operating Speed | 2900 RPM, 50 Hz |
| Voltage — Single Phase | 220V AC, 1 Phase (1.0–2.0 HP) |
| Voltage — Three Phase | 415V AC, 3 Phase (1.0–20.0 HP) |
| Motor Type | Two-Pole Continuous Duty Squirrel Cage Submersible Induction Motor |
| Insulation Class | Class F |
| Motor Protection | IP-68 / Thermal Overload |
| Cable | PVC Insulated Copper Conductor Flexible |
| Motor Body | SS-202 |
| Pump Casing | CI IS 210FG260 / SS-304 / SS-316 |
| Impeller | CI IS 210FG260 / SS-304 / SS-316 |
| Shaft | SS-404 |
| Strainer | SS-202 |
| Mechanical Seal | Double Type: SiC vs SiC / TC vs TC |
| Bearing | Deep Groove Ball Bearing (SKF) |
Performance Table — WSP Series (2900 RPM, 50 Hz)
| WSP 1.0/V — 1 HP, 50mm | 400 LPM @ 2m | 350 @ 4m | 300 @ 6m | 240 @ 8m | 145 @ 10m | Shut-off: 13.5m |
| WSP 2.0/Q — 2 HP, 50mm | 800 LPM @ 2m | 720 @ 4m | 630 @ 6m | 540 @ 8m | 420 @ 10m | 230 @ 14m | Shut-off: 16.5m |
| WSP 3.0 — 3 HP, 50mm | 770 LPM @ 8m | 680 @ 10m | 460 @ 14m | 380 @ 18m | 210 @ 20m | Shut-off: 21.5m |
| WSP 5.0 — 5 HP, 50mm | 805 LPM @ 10m | 700 @ 12m | 460 @ 14m | 350 @ 16m | 150 @ 18m | Shut-off: 28m |
| WSP 3.0 — 3 HP, 80mm | 1300 LPM @ 4m | 1100 @ 6m | 1000 @ 8m | 895 @ 10m | 600 @ 12m | 370 @ 14m | 160 @ 16m | Shut-off: 17.3m |
| WSP 5.0 — 5 HP, 80mm | 1800 LPM @ 4m | 1600 @ 6m | 1460 @ 8m | 1350 @ 10m | 1200 @ 12m | 950 @ 14m | 690 @ 16m | 470 @ 18m | Shut-off: 20m |
| WSP 5.0 — 5 HP, 100mm | 2300 LPM @ 6m | 1750 @ 8m | 1200 @ 12m | 650 @ 14m | Shut-off: 16m |
| WSP 7.5 — 7.5 HP, 100mm | 2700 LPM @ 6m | 2500 @ 8m | 1900 @ 12m | 1300 @ 14m | 990 @ 18m | 400 @ 20m | Shut-off: 22m |
| WSP 10.0 — 10 HP, 100mm | 3000 LPM @ 6m | 2800 @ 8m | 2050 @ 12m | 1400 @ 14m | 1200 @ 18m | 950 @ 20m | 400 @ 24m | Shut-off: 27m |
| WSP 15.0 — 15 HP, 100mm | 3200 LPM @ 6m | 3000 @ 8m | 2200 @ 12m | 1600 @ 14m | 1400 @ 18m | 1200 @ 20m | 900 @ 24m | 450 @ 28m | Shut-off: 32m |
| WSP 20.0 — 20 HP, 100mm | 3800 LPM @ 6m | 3250 @ 8m | 2980 @ 12m | 2700 @ 14m | 2600 @ 18m | 2200 @ 20m | 1750 @ 24m | 900 @ 28m | Shut-off: 36m |
Frequently Asked Questions
What solid sizes can the WSP Series pass without clogging?
Depending on the model, the WSP Series handles solids from 18 mm (50mm delivery models) up to 50 mm (100mm delivery models at 15–20 HP). The nonclog impeller design ensures reliable passage of sewage solids, rags, and debris under normal operating conditions.
Is the WSP Series suitable for continuous submerged operation?
Yes. The IP-68 rated motor protection and Class F insulation with thermal overload make the WSP Series fully rated for continuous submerged duty in drainage sumps, sewage wet wells, and flooded construction excavations.
Can I get a cutter or agitator version for sludge applications?
Yes. Agitator and cutter model variants of the WSP Series are available on request from Wel-Tech, suitable for sludge agitation and fibrous or stringy media that could otherwise wrap around a standard impeller.
What power supply options are available?
The WSP Series is available in 220V / 1-Phase for 1.0–2.0 HP portable models (with optional float switch), and 415V / 3-Phase for 1.0–20.0 HP industrial models — both at 50 Hz.