Description
WPWV Universal Worm Gear Reducer — Vertical Flange Mount for Pump Drives, Top-Entry Agitators & Vertical Process Equipment
When a pump drive, vessel agitator, or vertical conveyor head needs to be fed from a worm gearbox mounted directly above — with the output shaft pointing vertically downward to connect directly to the pump shaft or agitator stub — the WPWV universal vertical flange-mount worm gear reducer is the purpose-designed solution. The WPWV housing is configured for vertical output with correct oil lubrication in the upright position and a flange mounting face for bolt-down attachment to pump heads, vessel top flanges, and vertical machine mounting structures.
The compact vertical configuration (no separate right-angle drive required) and self-locking at high ratios make the WPWV the efficient, safe, and low-maintenance choice for agricultural pump stations, food vessel drives, and vertical process equipment across a wide range of industries. Available in 12 sizes (40–250 mm), ratios 1/5–1/60, three shaft-direction positions. About Ever-power | Get a Vertical Drive Quote
Technical Specifications
WPWV shares the specification drawing with WPWT. AB, BB = housing width/depth; CC = housing face dimension; LL = housing length for vertical configuration. Reference speed 1500 r/min. All dimensions in mm.
| Size | Ratio | AB | BB | CC | LL | M | N | E | E₁ | E₂ | G | Z | HS | U | T×V | LS | S | W×Y | Wt(kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40 | 1/5–1/60 | 87 | 74 | 40 | 63 | 90 | 187 | 70 | 72 | 97 | 12 | 10 | 25 | 12 | 4×2.5 | 28 | 14 | 5×3 | 5 |
| 50 | 108 | 97 | 50 | 70 | 120 | 226 | 95 | 90 | 110 | 14 | 12 | 30 | 12 | 4×2.5 | 40 | 17 | 5×3 | 8 | |
| 60 | 120 | 112 | 60 | 80 | 130 | 257 | 105 | 102 | 129 | 15 | 12 | 40 | 15 | 5×3 | 50 | 22 | 7×4 | 11 | |
| 70 | 140 | 131 | 70 | 95 | 150 | 305 | 115 | 120 | 155 | 20 | 15 | 50 | 18 | 5×3 | 60 | 28 | 7×4 | 15.5 | |
| 80 | 160 | 142 | 80 | 105 | 170 | 350 | 135 | 140 | 180 | 20 | 15 | 50 | 22 | 7×4 | 65 | 32 | 10×4.5 | 24 | |
| 100 | 190 | 169 | 100 | 135 | 190 | 410 | 155 | 165 | 215 | 22 | 15 | 50 | 25 | 7×4 | 75 | 38 | 10×4.5 | 38 | |
| 120 | 219 | 190 | 120 | 160 | 230 | 494 | 180 | 195 | 255 | 25 | 18 | 65 | 30 | 7×4 | 85 | 45 | 12×4.5 | 56 | |
| 135 | 249 | 210 | 135 | 185 | 250 | 559 | 200 | 230 | 285 | 30 | 18 | 75 | 35 | 10×4.5 | 95 | 55 | 16×6 | 84 | |
| 155 | 295 | 252 | 155 | 220 | 275 | 605 | 220 | 250 | 305 | 35 | 21 | 85 | 40 | 12×5 | 110 | 60 | 18×7 | 129 | |
| 175 | 314 | 255 | 175 | 240 | 310 | 675 | 250 | 273 | 348 | 40 | 21 | 85 | 45 | 14×5.5 | 110 | 65 | 18×7 | 157 | |
| 200 | 342 | 319 | 200 | 280 | 360 | 749 | 290 | 305 | 390 | 40 | 24 | 95 | 50 | 14×5.5 | 125 | 70 | 20×7.5 | 224 | |
| 250 | 420 | 385 | 250 | 315 | 460 | 920 | 380 | 375 | 475 | 45 | 28 | 110 | 60 | 18×7 | 155 | 90 | 25×9 | 374 |
* Shared specification drawing with WPWT. LL = housing length in vertical configuration. Three shaft-direction positions (A–C) covering vertical output and horizontal input arrangements for pump and agitator top-entry applications. Oil fill instructions for vertical orientation supplied with every unit.
Product Structure — Vertical Output with Flange Mounting Face
The WPWV housing positions the worm gear set for vertical output, with oil ports configured for correct lubrication in the upright operating position. The flange mounting face provides a flat bolt-down surface for attachment to pump head flanges, vessel top nozzle plates, and vertical machine mounting structures. The housing body dimensions (AB, BB, LL) reflect the vertical compact profile.
| Output Direction | Vertical shaft output (downward); compact upright housing profile |
| Mounting Face | Flanged face for bolt-down to pump heads, vessel top flanges, structures |
| Oil System | Configured for correct lubrication in vertical operating position |
| Shaft Positions | 3 positions (A–C) for motor-side orientation flexibility |
| Self-Locking | At ratios ≥1/30 — prevents gravity reversal of pump/agitator shaft |
| Housing | FC25 cast iron; compact vertical profile |
✅ Key Features & Benefits
Vertical Output — No Right-Angle Adapter Required
The WPWV delivers its output shaft vertically from a horizontal worm gear set in a single compact housing — no separate right-angle bevel gear adapter, no additional coupling, no extra alignment interface. This saves height, weight, and mechanical complexity in pump station and vessel agitator top-entry drives. Keywords: vertical output universal worm reducer, pump drive worm gearbox flange mount.
Correct Oil Lubrication in Vertical Position
The WPWV oil system is configured for vertical operation — ensuring correct gear mesh and bearing immersion when the unit is in its normal upright operating position. A horizontal gearbox used vertically without proper reconfiguration runs with inadequate lubrication at the high gear end, leading to accelerated wear.
Self-Locking Prevents Pump and Agitator Back-Drive
At ratios of 1/30 and above, the WPWV self-locks under static conditions — preventing pump back-spinning, agitator gravity reversal, and vertical conveyor carrier slide-back when the motor is de-energised. This eliminates the need for a check valve or shaft brake in many pump and agitator applications.
Flange Mounting Face for Direct Pump/Vessel Connection
The WPWV flat flange mounting face bolts directly to standard pump head flanges, vessel top nozzle plates, and vertical machine mounting structures — without adapter plates. This makes installation straightforward and provides a rigid, leak-free mechanical interface between the gearbox and the driven equipment structure.
Smooth Quiet Drive for Agitator Applications
The precision gear pair (≤72 dB(A)) delivers smooth, vibration-free output essential for vessel agitator applications where gear-induced vibration could affect mixing quality, fluid stability, or the integrity of fragile process materials.
12 Sizes for All Vertical Drive Requirements
Twelve sizes from 40 to 250 mm cover vertical pump drives from small agricultural irrigation pumps (size 40) to large industrial pump station drives (size 250) — all from a single standardised vertical flange-mount product.
Industry Applications
The WPWV is the compact vertical drive solution for pump stations, vessel agitators, and vertical process equipment across all industries:
Irrigation & Agricultural Pump DrivesAgricultural irrigation pump station drives, drainage pump vertical drive heads, and livestock water supply pump drives where the WPWV provides compact vertical motor-to-pump connection.
Chemical Vessel AgitatorsTop-entry chemical vessel agitator drives, mixing tank vertical drives, and chemical process vessel slow-rotation systems where the WPWV flange mounts directly to the vessel top nozzle plate.
Brewery & Food Vessel DrivesFermentation vessel top-entry agitator drives, food mixing vessel vertical drives, and dairy processing vessel drives where compact vertical gearbox mounting above the vessel is required.
Water Treatment Vertical DrivesVertical slow-rotation clarifier mechanism drives, water treatment aerator drives, and sedimentation tank vertical mechanism drives for municipal and industrial water treatment facilities.
Agricultural Grain Elevator HeadsVertical grain elevator head drives, seed conveyor vertical drive heads, and agricultural product elevating equipment vertical drive mechanisms requiring compact top-mounted gearbox drives.
Industrial Pump StationsIndustrial process pump station vertical drive heads, boiler feed pump auxiliary vertical drives, and industrial cooling water pump vertical drives where the flange mount secures directly to the pump coupling housing.
Quality Control & Certification
ISO 9001:2015 & CE
Full ISO 9001:2015 QMS. CE Declaration of Conformity per shipment. Vertical position oil fill verified before shipment. Flange mounting face flatness verified (≤0.05 mm TIR) to ensure correct pump or vessel contact without shimming.
⬆️ Vertical Orientation Run Test
Each WPWV is run-tested in its vertical operating position — not horizontal. Oil temperature, noise (≤72 dB(A)), and seal integrity are all verified in the upright orientation before shipment is approved. This ensures the product has been validated in its actual service condition.
Material Standards
Housing: FC25 cast iron (≥250 MPa). Worm: 20CrMnTi (≥58 HRC). Wheel: ZCuSn10Pb1 tin-bronze. Food-grade lubricant factory-fill available for food and brewing vessel agitator applications on request.
Why Choose Ever-power for WPWV Gearboxes
We supply WPWV vertical flange-mount worm gearboxes to agricultural pump equipment builders, brewery vessel manufacturers, and chemical vessel equipment suppliers in Italy, Spain, the UAE, Australia, and over 60 countries worldwide. Our vertical orientation run test — testing the WPWV in its actual service position — gives pump and vessel agitator customers confidence that the product performs correctly in vertical service before it leaves our facility.
- ✅ Vertical orientation run test standard — tested upright, every unit
- ✅ Flange face flatness verification — ≤0.05 mm TIR, no shimming required
- ✅ Food-grade lubricant option — NSF H1 factory-fill for food/brewing vessels
- ✅ Pump and agitator consultation — we advise on flange compatibility
- ✅ 20+ years export record — Italy, Spain, UAE, Australia and beyond
⭐ Customer Reviews
“We use WPWV units as the vertical drive head on our irrigation pump stations. The flange mount sits directly on the pump head coupling housing and the vertical output shaft connects straight to the pump — no right-angle adapter, no coupling above the gearbox. Self-locking at 1/40 prevents back-spin when the system pressure pushes back. Very compact and clean installation.”
Anthony W., Irrigation Engineer
Agricultural Irrigation Equipment, South Australia, Australia
“We integrate WPWV into our top-entry chemical vessel agitator drives. The vertical flange mount directly to the vessel top nozzle keeps the drive assembly very compact above the vessel, and the self-locking prevents agitator reverse rotation on process pressure. The vertical run test documentation was a useful quality record for our equipment file. Excellent product.”
Roberto B., Equipment Engineer
Chemical Vessel Equipment, Turin, Italy
“WPWV gearboxes for our fermentation vessel top-entry agitator drives. The vertical mount is exactly what we need above our fermentation tanks, and the food-grade lubricant option satisfies our HACCP requirements. The gear noise is very low which matters in our clean winery environment. Consistently good quality from Ever-power.”
Carlos G., Plant Engineer
Winery Equipment, La Rioja, Spain
“We use WPWV on our industrial pump station vertical drive heads. The flange mount gives a rigid connection to our pump structures and the vertical configuration is exactly what our pump layout requires. Good quality, reliable supply. Would recommend for pump drive applications.”
Yousef K., Technical Manager
Industrial Pump Station, Dubai, UAE
❓ Frequently Asked Questions
What is the difference between WPWV and WPWT?
Both WPWV and WPWT are specialised mounting variants sharing the same specification table. The WPWV is configured for vertical output — output shaft pointing downward for pump and agitator top-entry drives — with three shaft-direction positions (A–C). The WPWT is configured for tilted/inclined mounting — for inclined conveyor and quarry equipment drives — with five shaft-direction positions (A–E). Select WPWV for vertical downward output; select WPWT for inclined mounting.
How does the WPWV flange connect to a pump head?
The WPWV flat flange mounting face bolts directly to the pump coupling housing or pump head adapter plate. The flange face is machined to ≤0.05 mm flatness, ensuring full face contact without shimming. Confirm the pump head bolt pattern matches the WPWV flange hole pattern for your size — contact us with your pump head drawing for a compatibility check if required.
What is the maximum pump power the WPWV can drive?
At 1500 r/min input, size 250 at ratio 1/60 delivers approximately 2,371 Nm — sufficient to drive centrifugal pumps, progressive cavity pumps, and gear pumps up to very large capacities depending on the pump head pressure and speed requirements. Contact our engineers with your pump rated torque and required speed for a precise selection.
Can the WPWV be used for agitator drives where the impeller creates upward axial thrust?
Yes — the WPWV output shaft bearings are selected for the downward gravity load plus any upward thrust from the agitator impeller. For high-thrust impeller configurations (e.g. axial flow impellers running upward), contact us with the impeller thrust specification for a bearing life verification.
What lubricant should be used in the WPWV for food or brewing vessel applications?
For food and brewing vessel agitator applications, specify NSF H1 registered food-grade gear oil — available as a factory-fill option. Standard ISO VG 320 mineral oil is not food-grade. Food-grade PAO or PG synthetic oils are available with factory-fill on request, and also provide better thermal stability and longer drain intervals than mineral oil.
Compact Vertical Drive for Your Pump or Vessel — Get WPWV Quote
Whether your pump needs a vertical top-mount or your vessel agitator requires a compact upright drive, the WPWV delivers in the most efficient configuration. Our engineers will confirm flange compatibility and provide a free selection calculation.
