Positive Displacement Pump Prevents Particle Build Up

The SPX Waukesha series of positive displacement pumps include advanced sanitation technologies, long-life features, and installation flexibility. They are also Clean-in-Place (CIP) capable that are engineered to perform in food & beverage, dairy, pharmaceutical, and personal care industries.

U3 Series – Pump for Life Program

Key Features & Benefits

  • CIP capability available. Pump body has optional internal flat body profile and
    will free drain with vertical ports. Optional rotor and body hub drilling provided for difficult CIP cleaning applications.
  • Cover is free draining in horizontal or vertical port positions.
  • Rotor/shaft connection sealed from product zone.
  • Single mechanical seals standard. Optional double mechanical seals
    also available.
  • Seal flush optional: seal areas interconnected to improve circulation
    and draining of seal flush fluid. Steam-In-Place also is optional.
  • Optional Aseptic design

Long-life Features

  • Heavy-duty stainless-steel bearing frame standard
  • Double tapered roller bearings
  • Greased lubed bearings for positive lubrication to all bearings over entire speed, temperature, and pressure range
  • Body retaining screws for maintaining mechanical seal contact during inspection
  • Extended outer seal life. A wave spring, instead of an O-ring, mechanically loads the seal
  • Unique mechanical seal design utilizes 2 pin stationary seal and special design shaft for rotary seal

Success Story:

Universal 3 Series Positive Displacement Pump


A major processor of sauces, dressings, and dips uses positive displacement (PD) pumps to transfer its products that contain suspended particulates such as tomato, onion, pepper pieces, garlic, basil, and salt.

Problem: The customer* had been using PD pumps in their process lines for many years. However, after a period of time, they discovered small ingredient particulates beginning to accumulate around the cover O-ring even after completing the clean in place (CIP) cycles giving rise to a risk of contamination. Sanitation personnel were then forced to open and further clean the pumps manually (on designs meant to be fully CIP-able) – delaying production times significantly.

Solution: The customer tested a Waukesha Universal 3 PD Pump that utilizes a L-shaped gasket in the front of the body which mates up with the flat pump cover, preventing particles from accumulating. The customer ran multiple test products and CIP solution through a model U3 size 045. After each run, the pump was disassembled for inspection and no accumulation around the L-gasket was found.

Result: The customer was delighted with the results and has informed SPX FLOW that they are making plans to replace other pumps with the Waukesha Universal 3 series. As an additional benefit, U3 pumps use the same shaft seals for model sizes 30-130, helping to further reduce spare parts inventories.

* Company name not disclosed for confidentiality reasons

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