The heavy-duty Universal pump for industrial products that don't behave politely.
The Waukesha Universal 2 ND is purpose-built for heavy-duty industrial positive displacement service — slurries, viscous products, shear-sensitive fluids, chemical transfer, and difficult applications where long life and installation flexibility matter.
A robust rotary lobe platform for heavy-duty industrial transfer.
The U2 ND takes the Universal 2 platform into tougher industrial service where settled slurries, viscous products, or process variability can make ordinary pump selections expensive in the field.
Waukesha's external circumferential piston design gives the U2 ND steady, low-pulsation flow, bi-directional capability, and no internal rotor contact. The result is a durable option for products that need positive displacement transfer without unnecessary shear.
Triplex supports U2 ND sizing, replacement, parts, manuals, and seal review — especially when the application involves slurries, flush needs, dry-running concerns, or pressure near the upper end of the model range.
Resins, polymers, sludges
Heavy-duty transfer where viscosity and pressure matter.
Solvents, fuels, oils
Review materials and elastomers before final selection.
Wastewater / byproducts
Useful where slurries and settled solids create startup risk.
Cosmetic oils and gels
Low-shear transfer of shear-sensitive products.
Built for long life in demanding process duty.
The U2 ND emphasizes rugged construction, seal life, and process flexibility rather than a one-size-fits-all pump promise.
Platform features
- Pumps filled with settled slurries can start without damaging pump or seals when properly applied.
- Water-flushed seal arrangements can support extended dry-running capability.
- Low-shear, pulsation-free flow helps protect sensitive products and downstream equipment.
- No internal rotor contact reduces wear and simplifies maintenance expectations.
- Rotor/shaft connection is sealed from the product zone.
- No oil seepage into the product zone reduces contamination concerns.
- Large-diameter 17-4 PH shafts improve stiffness and help extend seal life.
- Grease-lubricated bearings support operation across speed, temperature, and pressure ranges.
- Model & Performance Center
- U1 vs U2 vs U3 comparison
- Sanitary PD pump selection guide
- Waukesha pump parts help
- Sanitary pump seal failure guide
Selection notes
- Confirm material compatibility for product and cleaning chemistry.
- Review seal style, flush plan, elastomers, and dry-running expectations early.
- Check startup conditions if product settles, crystallizes, or contains solids.
- Confirm pressure, viscosity, horsepower, and line losses with Triplex before ordering.
The circumferential piston principle.
Universal Series pumps use Waukesha's external circumferential piston design: long sealing paths, tight running clearances, and non-galling Alloy 88 rotors to move viscous or shear-sensitive products with steady flow.
Because the rotors do not contact each other, Universal pumps can handle sensitive products with lower shear than many pump styles. The close clearances reduce slip, and the robust shaft/bearing arrangement helps maintain alignment under pressure.
Final sizing still depends on product viscosity, temperature, pressure, line losses, cleaning method, and seal requirements. Triplex can verify the right model, rotor, seal, elastomer, and motor configuration before ordering.
Universal 2 ND model range.
Core U2 ND model data from the existing Triplex reference page, including nominal capacity and maximum pressure ranges.
| Model | Displacement / Rev. | Capacity To | Maximum Pressure |
|---|---|---|---|
| 006-U2 ND | 0.0082 gal (0.031 L) | 8 GPM (1.8 m³/hr) | 300 PSI (20.7 bar) |
| 015-U2 ND | 0.0142 gal (0.054 L) | 11 GPM (2.5 m³/hr) | 250 PSI (17.2 bar) |
| 018-U2 ND | 0.029 gal (0.110 L) | 20 GPM (4.5 m³/hr) | 200 PSI (13.8 bar) |
| 030-U2 ND | 0.060 gal (0.227 L) | 36 GPM (8.2 m³/hr) | 250 PSI (17.2 bar) |
| 040-U2 ND | 0.076 gal (0.288 L) | 45 GPM (10.2 m³/hr) | 150 PSI (10.3 bar) |
| 045-U2 ND | 0.098 gal (0.371 L) | 58 GPM (13.2 m³/hr) | 450 PSI (31.0 bar) |
| 060-U2 ND | 0.153 gal (0.579 L) | 90 GPM (20.4 m³/hr) | 300 PSI (20.7 bar) |
| 130-U2 ND | 0.253 gal (0.958 L) | 150 GPM (34.1 m³/hr) | 200 PSI (13.8 bar) |
| 180-U2 ND | 0.380 gal (1.438 L) | 230 GPM (52.2 m³/hr) | 450 PSI (31.0 bar) |
| 210-U2 ND | 0.502 gal (1.900 L) | 300 GPM (68.1 m³/hr) | 500 PSI (34.5 bar) |
| 213-U2 ND | 0.502 gal (1.900 L) | 300 GPM (68.1 m³/hr) | 500 PSI (34.5 bar) |
| 220-U2 ND | 0.521 gal (1.972 L) | 310 GPM (70.4 m³/hr) | 300 PSI (20.7 bar) |
| 320-U2 ND | 0.752 gal (2.847 L) | 450 GPM (102 m³/hr) | 300 PSI (20.7 bar) |
| 370-U2 ND | 1.099 gal (4.160 L) | 660 GPM (150 m³/hr) | 200 PSI (13.8 bar) |
Capacities and pressure ratings vary by product, speed, viscosity, temperature, seal selection, and system conditions. Confirm final sizing with Triplex before ordering.
Documentation and field resources.
Brochures, manuals, seal references, and related resources for quoting, maintenance, and parts support.
Questions we actually get.
Other pumps in the rotary lobe family.
Compare the U1, U2, U2 ND, U3, and APV R Series on the main rotary lobe overview.
