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WPEDO Flange-Mounted Vertical Double Speed Worm Gear Reducer — Motor-Direct 1/200–1/900 Drive for Vertical Process Equipment & Wastewater Systems
Deep wastewater treatment tanks, tall vertical stirring towers, and multi-storey process vessels all share a common drive challenge: a very high reduction ratio must be delivered in a vertical orientation, from a motor that connects directly without couplings, in a configuration that fits the spatial constraints of the structure. The WPEDO flange-mounted vertical double speed worm gear reducer resolves all three requirements simultaneously — combining IEC motor direct mounting, two-stage 1/200–1/900 reduction, and multi-direction mounting capability (including full vertical) in a single cast iron unit.
The WPEDO is particularly distinguished by its multi-face oil-fill system, which ensures both worm gear stages remain correctly lubricated regardless of the mounting angle — an essential feature absent in many competitor vertical-mount products that ignore the oil level consequences of non-horizontal installation. Available in 9 size groups, motors 0.12–5.5 kW, ratios 1/200–1/900. Giới thiệu về Everpower | Request a Layout Consultation
Technical Specifications
WPEDO shares the WPEDX housing body with multi-face oil ports for vertical mounting. BA, BC = offset dimensions; CA = output shaft span. Motor flange: LA, LB, LC, LE, LZ. All in mm; reference speed 1500 r/min. Shared drawing with WPEDX.
| Size | Power(kW) | Ratio | A | AB | BA | BB | BC | BE | HB | CA | M | N | E | E₁ | E₂ | G | Z | LA | LB | LC | LE | LZ | Q | U | T×V | LS | S | W×Y | Wt(kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40-70 | 0.12 | 1/200–1/900 | 314 | 153 | 40 | 131 | 65 | 75 | 50 | 145 | 156 | 295 | 120 | 120 | 135 | 20 | 15 | 115 | 95 | 140 | 4 | M8 | 31 | 11 | 4×12.8 | 60 | 28 | 7×4 | 19 |
| 50-80 | 0.18 | 314 | 144 | 50 | 142 | 70 | 83 | 65 | 163 | 175 | 320 | 140 | 130 | 150 | 20 | 15 | 115 | 95 | 140 | 4 | M8 | 31 | 11 | 4×12.8 | 65 | 32 | 10×4.5 | 27 | |
| 60-100 | 0.37 | 1/200 | 387 | 175 | 60 | 169 | 90 | 91 | 75 | 191 | 224 | 375 | 190 | 155 | 180 | 26 | 15 | 130 | 110 | 160 | 4 | M8 | 33 | 14 | 5×16.3 | 75 | 38 | 10×4.5 | 45 |
| 70-120 | 0.37/0.75 | 1/300–1/400 | 425/445 | 193 | 70 | 190 | 100 | 109/111 | 90 | 266 | 266 | 450 | 220 | 185 | 215 | 30 | 18 | 130/165 | 110/130 | 160/200 | 4 | M8/M10 | 40/42 | 14/19 | 5×16.3/6×21.8 | 85 | 45 | 12×4.5 | 65 |
| 80-135 | 0.75/1.5 | 1/500–1/600 | 499 | 226 | 80 | 210 | 110 | 125 | 105 | 303 | 350 | 590 | 260 | 210 | 235 | 30 | 18 | 165 | 130 | 200 | 4.5 | M10 | 48/52 | 19/24 | 6×21.8/8×27.3 | 95 | 55 | 16×6 | 98 |
| 100-155 | 1.5 | 1/800 | 570 | 269 | 100 | 252 | 140 | 148 | 130 | 303 | 350 | 590 | 290 | 245 | 295 | 35 | 21 | 165 | 130 | 200 | 4.5 | M10 | 52 | 24 | 8×27.3 | 110 | 60 | 18×7 | 152 |
| 120-175 | 2.2/3.0 | 1/900 | 631 | 287 | 120 | 255 | 150 | 181 | 155 | 356 | 394 | 640 | 320 | 267 | 323 | 40 | 21 | 215 | 180 | 250 | 5 | M12 | 63 | 28 | 8×31.3 | 110 | 65 | 18×7 | 194 |
| 135-200 | 3.0/4.0 | 680 | 318 | 135 | 319 | 175 | 202 | 185 | 402 | 440 | 710 | 370 | 290 | 360 | 40 | 24 | 215 | 180 | 253 | 5 | M12 | 63 | 28 | 8×31.3 | 125 | 70 | 20×7.5 | 283 | |
| 155-250 | 5.5 | 815 | 380 | 155 | 385 | 200 | 247 | 203 | 497 | 510 | 860 | 440 | 350 | 440 | 45 | 28 | 265 | 230 | 300 | 5 | M12 | 83 | 38 | 10×41.3 | 155 | 90 | 25×9 | 450 |
* Shared specification drawing with WPEDX. E₁ and E₂ = output shaft dimensions for WPEDX (dual shaft) variant. For WPEDO, output is a single shaft. Multiple oil-fill ports on housing faces for correct level at any mounting orientation. Contact factory for position-specific oil fill instructions.
Product Structure — IEC Flange + Two-Stage Cascade + Multi-Orientation Design
The WPEDO combines an IEC motor flange at the first-stage input with a two-stage worm cascade and a housing body that incorporates multi-face oil-fill ports, reinforced output shaft bearings, and multiple mounting face preparations. This allows the unit to operate correctly in horizontal, inclined, and vertical orientations while maintaining adequate lubrication at both worm gear stages — a critical engineering requirement for two-stage units in non-horizontal service.
| Input | IEC 60034-7 flange + keyed bore — motor direct, no coupling |
| Stages | Two worm-and-wheel pairs in series; ratio 1/200–1/900 |
| Orientations | Multiple positions including full vertical — up to 6 configurations |
| Oil System | Multi-face oil ports — correct level for both stages at any angle |
| Bearings | Reinforced output shaft bearings for combined axial/radial vertical loads |
| Self-Locking | Strong at combined ratios ≥1/400 — important for vertical process equipment |
✅ Key Features & Benefits
Motor-Direct + Two-Stage + Vertical — Three Critical Requirements in One
The WPEDO uniquely satisfies three simultaneous vertical-drive requirements: no input coupling (IEC flange), extreme reduction ratio (1/200–1/900), and safe non-horizontal mounting with correct oil lubrication at both stages. No single-stage product meets the ratio requirement; few two-stage products address the lubrication consequences of vertical mounting. Keywords: motor-direct vertical double speed worm gearbox, IEC flange two-stage vertical reducer.
Multi-Face Oil System — Both Stages Lubricated in Any Position
The WPEDO’s most critical engineering feature is its multi-face oil-fill system, which ensures both the first-stage and second-stage worm gear meshes are correctly lubricated at any supported mounting angle. A two-stage gearbox in vertical orientation without this feature will have at least one stage under-lubricated — leading to accelerated wear and early failure.
Strong Self-Locking for Vertical Process Safety
At combined ratios of 1/400 and above, the WPEDO self-locks under static conditions, preventing agitator shafts, pump shafts, or vertical conveyors from back-driving under gravity when the motor is de-energised. Combined with motor-direct mounting, this provides both operational efficiency and passive safety for vertical process equipment.
Rapid Motor Replacement in Vertical Structures
The IEC pilot register allows motor swap in 15–20 minutes, even in vertical shaft structures and elevated process vessel locations where coupling disassembly and alignment would otherwise require significant scaffolding and downtime.
Reinforced Vertical Load Bearings
The output shaft bearing arrangement is specifically designed for the combined axial and radial loads generated in vertical and inclined mounting. This is not a standard horizontal gearbox rotated vertically — the bearing selection reflects actual vertical load vectors, ensuring bearing life targets are met in vertical service.
Two-Stage Precision for Very Slow Vertical Processes
Both worm pairs ground to ISO 1328 Grade 7 deliver smooth, uniform output at the ultra-low speeds (1/200–1/900 × motor speed) essential for clarifier rakes, vertical agitators, and deep well pump auxiliaries where non-uniform output speed causes process disruption.
Industry Applications
The WPEDO is the solution of choice for motor-direct ultra-high ratio drives in vertical and non-standard orientation applications:
Deep Wastewater Treatment TanksLarge clarifier rake drive systems, sludge digester mixing drives, and deep-basin aerator drives in municipal and industrial wastewater treatment plants requiring 1/400–1/900 ratio vertical motor-direct drives.
Tall Vertical Reaction VesselsPharmaceutical and chemical reactor top-entry agitator drives, large fermentation vessel drives, and vertical crystalliser agitation systems requiring ultra-low impeller speeds from compact motor-direct vertical assemblies.
Elevated Process StructuresChemical plant tower agitators, distillation column auxiliary drives, and spray-tower slow rotation systems where the WPEDO’s compact motor-direct format minimises the weight and footprint added to elevated structures.
Marine & Offshore Vertical DrivesOffshore platform deck crane vertical auxiliary drives, ship-mounted pump drives, and marine lifting system auxiliaries requiring 1/600–1/900 ratio motor-direct vertical drive in space-constrained vessel structures.
Biogas & Anaerobic TreatmentBiogas digester vertical mixing drives, anaerobic reactor agitator drives, and composting vessel slow-rotation systems requiring reliable ultra-low-speed motor-direct vertical drives in outdoor installations.
Heavy Lifting & PositioningScissor lift table heavy-duty drives, industrial elevator auxiliary drives, and large positioning table slow-rotation drives requiring 1/800–1/900 ratio compact motor-direct vertical drive with self-locking.
Quality Control & Certification
ISO 9001:2015 & CE
Full ISO 9001:2015 QMS. CE Declaration of Conformity per shipment. IEC flange concentricity CMM verified (≤0.05 mm TIR). Multi-orientation oil-fill instructions supplied with every WPEDO unit, with position-specific fill levels documented for all rated orientations.
Dual-Orientation Two-Stage Run Test
Each WPEDO is run-tested in both horizontal AND vertical orientations. Both tests verify: noise (≤75 dB(A) at both gear meshes), oil seal integrity, and output torque (±5% of rated). Oil temperature is measured at both stage positions in each orientation before shipment is approved.
️ Material Standards
Housing: FC25 cast iron (≥250 MPa). Both worm shafts: 20CrMnTi (≥58 HRC). Wheel rims: ZCuSn10Pb1 tin-bronze. SGS/BV third-party inspection available for wastewater authority, marine classification, and pharmaceutical GMP compliance documentation.
Why Choose Ever-power for WPEDO Gearboxes
We supply WPEDO motor-direct vertical two-stage gearboxes to wastewater treatment equipment builders, pharmaceutical vessel manufacturers, and marine equipment suppliers in the UK, India, Canada, Australia, and over 60 countries. Our dual-orientation run test — both horizontal and vertical on every unit — gives our customers in wastewater and offshore industries confidence that the product performs correctly in its actual installed position, not just in a horizontal test rig.
- ✅ Dual-orientation run test standard — horizontal and vertical, every WPEDO
- ✅ Position-specific oil fill documentation — supplied with every unit
- ✅ Wastewater & marine compliance documentation on request
- ✅ IEC flange CMM verification — every unit before shipment
- ✅ 20+ years export record — UK, India, Canada, Australia and beyond
⭐ Customer Reviews
“We use WPEDO units at 1/800 ratio on our large clarifier rake drives. The IEC flange motor mounting makes motor replacement straightforward in our covered tank structure, and the 1/800 ratio gives us the very slow rake rotation our settling process requires. The dual-orientation oil fill documentation supplied with the units was exactly what our installation team needed. Excellent product.”
Tom H., Process Engineer
Wastewater Treatment Authority, South Australia, Australia
“We integrate WPEDO gearboxes into our large sludge digester mixing systems. The motor-direct vertical format fits neatly into our digester top structure and the 1/600 ratio achieves the slow agitation speed our process requires. The units have performed reliably in continuous outdoor service through two UK winters. Very satisfied.”
Gareth R., Mechanical Engineer
Water Treatment Equipment OEM, Birmingham, United Kingdom
“We use WPEDO for vertical agitator drives on our chemical reactor vessels. The IEC flange accepts our standard motors, the 1/900 ratio gives us ultra-slow impeller speed for our viscous products, and the multi-face oil system handles our vertical mounting correctly. Two years of reliable operation. Excellent quality from Ever-power.”
Arun M., Applications Engineer
Chemical Vessel Equipment, Chennai, India
“WPEDO gearboxes for our wastewater treatment clarifier drives in northern Canada. The units operate reliably in our cold-climate covered tank structures. The dual-orientation test report that accompanied the shipment was a useful quality assurance document for our engineering records. Would recommend.”
Derek P., Project Manager
Industrial Water Treatment, Alberta, Canada
❓ Frequently Asked Questions
How does WPEDO differ from WPEO?
The WPEO has a standard solid input shaft requiring an external coupling to the motor. The WPEDO has an IEC motor flange allowing direct motor attachment without a coupling. Both support multi-direction mounting including vertical, and both use the multi-face oil-fill system for correct lubrication at any orientation. Choose WPEO for indirect-drive arrangements; choose WPEDO for motor-direct installation eliminating the input coupling.
Do I need to adjust the oil level when mounting the WPEDO vertically?
Yes — this is critical for a two-stage unit. Both gear stages must have correct oil immersion regardless of mounting angle. The WPEDO has oil-fill and drain ports on multiple housing faces for this purpose. Every WPEDO unit is supplied with a position-specific oil-fill instruction sheet showing the correct fill level for each rated mounting orientation. Do not use horizontal fill level guidance for vertical or inclined installations.
What is the self-locking characteristic of the WPEDO in vertical orientation?
At combined ratios of 1/400 and above, the WPEDO provides static self-locking in any orientation including vertical. For vertical process equipment drives (clarifiers, agitators, pumps), this passive load-holding function prevents back-spinning or gravity reversal when the motor is de-energised. As with all worm gear self-locking, use a dedicated mechanical brake as the primary safety device in safety-critical applications.
Can the WPEDO be used outdoors in exposed environments?
The standard WPEDO is suitable for covered outdoor environments. For exposed outdoor or marine applications, we recommend the optional anti-corrosion coating and stainless steel external hardware. NBR seals are standard; Viton seals for chemical resistance are available on request. Contact us with your environmental specification for a recommendation.
What is the maximum motor power for the WPEDO in vertical orientation?
The maximum motor power in the WPEDO is 5.5 kW for size 155-250. The motor power limit is the same in horizontal and vertical orientations — the rating is governed by gear set torque capacity, not mounting orientation. However, for continuous vertical service with large motors at high duty cycles, we recommend the WPEDOS (finned vertical variant, if required) for enhanced thermal management of the combined motor and two-stage gear heat load.
Motor-Direct Vertical Ultra-High Ratio Drive — Get WPEDO Quote
If your wastewater tank, process vessel, or elevated structure needs a compact motor-direct two-stage drive in a vertical or inclined orientation, the WPEDO is engineered for exactly this application. Contact us for a free specification and oil-fill configuration recommendation.
