Hopper Pump For Precise Metering
MW range pumps are used to convey highly viscous media such as peanut butter, molasses, resins, and other media with low flowability. The open hopper on the pump directs media to the auger feed screw on the coupling rod, which feeds the media into the rotor and stator.
InletOpen Hopper & Auger Feed Screw
MeteringValveless Flow Control
DriveClose Coupled Connection
MediaHighly Viscous & Low Flowability
Dosing 1–550 Litres Per Hour
ROTOMAC™ MW Hopper Pump
Metering a thin liquid is straightforward. Metering peanut butter, molasses or resin is not — the product will not feed itself into a conventional dosing pump, and accuracy collapses as soon as the inlet starves. The MW solves that at the intake.
An open rectangular hopper accepts the product and an auger feed screw on the coupling rod carries it steadily into the rotor and stator. The pumping element stays fully charged, so every revolution displaces the same volume — which is exactly what precise metering depends on.
Valveless by design. There are no check valves to stick, clog or wear on solids-bearing product. Flow is controlled purely by pump speed, which makes dosing linear, repeatable and simple to automate.
Product That Will Not Flow
The MW is specified where the product is too thick, too sticky or too particulate-laden to feed a standard metering pump.
Details & Configuration
Everything you need to know about the MW Hopper Pump — from core benefits to full technical configuration options.
Economical
Reduced costs due to inexpensive rotating unit.
No Vapor Locking
Cavity design allows for conveyance of liquids, solids, and gases.
Performance Efficiency
Low slip (internal back flow) provides performance efficiency and less wear on components.
Ease of Operation
Valveless flow control for ease of operation.
- Discharge Port
- Only available in stainless steel, threaded connections to BSP or NPT standards.
- Rotor
- Wear resistant and corrosion-resistant materials.
- Stator
- The seal on both ends is molded as an integral part of the elastomeric stator.
- Open Hopper
- Rectangular Feed Hopper with conveying screw for pumping highly viscous product.
- Shaft Sealing
- Only available with Mechanical seal configurations.
- Body
- For connection of pump and drive and to secure the assembly to the baseplate or directly to the foundation.
- Coupling Rod
- With two pin joints with hardened and wear resistant components, easily assembled, grease lubricated and positively sealed with elastomer sleeves and two holding bands.
- Close Coupled Drive Connection
- For easy dismantling of the pump and drive, enabling quick replacement of the rotating parts and shaft seals. The yoke shaft pin secures the shaft connection to the drive and the water thrower protects the drive from contamination / gland leakage.
- Drive
- Geared motors, variable speed drives or frequency controlled motors of all major manufacturers, directly flanged to the pump without additional couplings or guards. Covers made of stainless steel are available.
Technical Specifications
Typical Applications
Accurate, repeatable dosing of thick product across food, chemical and industrial process lines.
Food Processing
Peanut butter, molasses, fillings, pastes and concentrates.
Adhesives & Resins
Metered dosing of resins, sealants and structural adhesives.
Chemical Dosing
Additives, polymers and flocculants at controlled rates.
Cosmetics
Thick creams, balms, waxes and pigment pastes.
Pharmaceutical
Semi-solid formulations and ointment base metering.
Paints & Coatings
Tinting, pigment dosing and high-solids coating transfer.
Construction Chemicals
Admixtures, grouts, mastics and viscous compounds.
Water Treatment
Viscous polymer and sludge conditioner dosing.
Need an MW Hopper Pump?
Share your product viscosity, required dosing rate, discharge pressure and control method — our engineers will confirm the right MW size, stator material and drive configuration.
Email Us
contact@rotomac.orgCall Us
+91 7522 002204 (Sales)Head Office
D-4a, Panki Industrial Area, Site-1, Kanpur – 208022, India