Waukesha Universal 2 Pump

Waukesha Universal 2 Series Pump

The Waukesha Universal 2 Series positive displacement pumps include advanced sanitation technologies and long-life features. Clean-in-Place (CIP) capable with an optional flat body profile and free-draining vertical ports, they also offer installation flexibility. The Universal 2 Pump has become an industry standard for positive displacement pumps.

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Universal 2 Overview

Key Features

  • CIP (Clean-In-Place) capability available:
    • Optional internal flat body profile for improved drainage
    • Free-draining with vertical ports
    • Optional rotor and body hub drilling for challenging CIP applications
  • Cover is free-draining in both horizontal and vertical port positions
  • Rotor/shaft connection sealed from the product zone
  • Single mechanical seals standard
  • Optional seal configurations:
    • Double mechanical seals
    • Triple lip seals for chemically aggressive or COP (Clean-Out-of-Place) sanitary applications
  • Seal flush optional:
    • Interconnected seal areas for improved circulation and drainage
    • Steam-In-Place (SIP) capability also available

Long-Life Features

  • Pressure capability up to 500 psi (34.5 bar)
  • Special rotor nut designed for extended service without loosening
  • No bearings in the product zone
  • Large diameter 17-4 PH shafts:
    • Greater strength and stiffness
    • Reduces vibration and extends seal life
  • Heavy-duty bearing frame (stainless steel optional)
  • Double tapered roller bearings
  • Grease-lubricated bearings for consistent lubrication across all operating conditions
  • Body retaining screws maintain mechanical seal contact during inspection
  • Wave spring mechanically loads the seal for extended outer seal life
  • O-ring on the inner seal maintains sealing on a clean surface as wear occurs
  • Unique mechanical seal design
    • 3-pin stationary seal
    • Specially designed shaft for rotary seal

Theory of Operation:

Positive Displacement Pumps

The Waukesha Universal Series positive displacement pump operates on a rotary lobe principle, using two precision-engineered rotors that turn in synchronization within a close-clearance rotor case. As the rotors rotate, they create expanding cavities on the inlet side of the pump. This expansion draws product into the pump chamber without excessive shear or turbulence, making it ideal for high-viscosity, shear-sensitive, or particulate-laden fluids.

As the rotors continue to rotate, the cavities carry the product around the periphery of the rotor case. On the discharge side, the cavities contract, forcing product out of the pump and into the process line. Because the rotors never actually touch each other or the pump housing, the design maintains tight, repeatable flow with minimal product slip — even under high discharge pressures.

Alloy 88: How It Works

A key feature of the Waukesha pump line is the use of Alloy 88, a proprietary non-galling material used for rotor construction. Traditional stainless steel rotors can be prone to galling or seizing under close-clearance, metal-to-metal conditions—particularly in high-pressure or low-lubricity product applications.

Alloy 88 provides several benefits:

  • Non-Galling Performance: Prevents rotor-to-rotor and rotor-to-case contact damage, even under upset conditions.
  • Durability: Withstands the demanding conditions of sanitary and industrial processes.
  • Reliability: Allows for tighter operating clearances to decrease slip, which improves pump efficiency and volumetric accuracy without risk of rotor binding.

By combining the gentle, low-shear pumping action of rotary lobe technology with the robust, non-galling properties of Alloy 88, Waukesha Universal Series pumps deliver a balance of efficiency, reliability, and long service life.

Alloy 88 Rotor Design

For decades, Waukesha has advanced rotary pump technology, refining every detail. The Alloy 88 rotor design continues that legacy, built to prevent galling, maintain precision, and keep your process running smoothly in demanding environments.

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Key Applications

Soups
Stews
Tomato Pastes
Vegetables
Dressings
Chocolate
Fats & Oils
Batters
Cream Fillings
Brewery
Wort
Soft Drinks
Fruit Drinks
Meat Processing
Cream
Milk
Cheese Curd
Whey
Cottage Cheese
Yogurt
Pill Pastes
Syrups
Extracts
Slurries
Face Creams
Lotions
Hair Styling Gels & Liquids
Dyes
Alcohols
Soaps
Cosmetics
Solvents
Paints
Fuels
Resins
Polymers
Sludges
Oil
Lubricants

Technical Specifications

MODEL DISPLACEMENT PER REVOLUTION NOMINAL CAPACITY TO MAXIMUM PRESSURE
006-U2 0.0082 Gal. (0.031 Liter) 8 GPM (1.8 m³/hr.) 300 PSI (20.7 bar)
015-U2 0.0142 Gal. (0.054 Liter) 11 GPM (2.5 m³/hr.) 250 PSI (17.2 bar)
018-U2 0.029 Gal. (0.110 Liter) 20 GPM (4.5 m³/hr.) 200 PSI (13.8 bar)
030-U2 0.060 Gal. (0.227 Liter) 36 GPM (8.2 m³/hr.) 250 PSI (17.2 bar)
040-U2 0.076 Gal. (0.288 Liter) 45 GPM (10.2 m³/hr.) 150 PSI (10.3 bar)
045-U2 0.098 Gal. (0.371 Liter) 58 GPM (13.2 m³/hr.) 450 PSI (31.0 bar)
060-U2 0.153 Gal. (0.579 Liter) 90 GPM (20.4 m³/hr.) 300 PSI (20.7 bar)
130-U2 0.253 Gal. (0.958 Liter) 150 GPM (34.1 m³/hr.) 200 PSI (13.8 bar)

Your Process, Our Priority

Expertise you can rely on.

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Tools & Resources

Learn More about Waukesha Universal 2 Brochure (opens in new tab)
Learn More about Waukesha Universal 2 Manual (opens in new tab)
Learn More about Waukesha Universal 2 Seal Chart (opens in new tab)
Learn More about Waukesha Universal 2 Seal Kits (opens in new tab)
Learn More about WCC Pump Repair Flyer (opens in new tab)

Videos

Frequently Asked Questions