Cold-Clean™ System

Smith Engineering / Water Treatment / Cold-Clean™ System

Cold-Clean™ System

Cold-Clean™ system refers to Smith Engineering’s line of DI-Ultrafiltration Purified Water Systems that are a perfect fit for manufacturing applications that require low/no microbial and/or endotoxin content.

Our Cold-Clean™ system provides purified water meeting the quality requirements found in USP Purified and WFI, all without the use of heat. System sizes begin at a 5 gpm flow rate and can be built in multiples of that size. Typically incorporation of a serpentine distribution loop is required; materials are chosen based on the final water quality specification requirement.

Cold-Clean™ is a term coined by Smith Engineering to describe the philosophy adhered to in the manufacture of water treatment and distribution system meeting a variety of purity standards. Cold-Clean™ is an alternative to heated technologies for the production of low/no microbial process water.

Typical design specification include the following:

  • Resistivity / Conductivity
  • pH
  • Microbial / Endotoxin Levels
  • Total Organic Carbon


  • RO/DI  or DI feeds Microfiltration/Ultrafiltration
  • Recirculation Design Within the treatment equipment and storage
  • Zero Dead Leg Design and Components
  • Continuous Distribution System Velocity
  • Ultraviolet Disinfection
  • Routine Chemical Disinfection

Cold Clean Valve


  • Quality materials of construction including 316 stainless steel housings and vessels
  • Sanitary, non-metallic piping materials beyond the last point of treatment
  • USP Class VI Plastics and Elastomers
  • Membrane-friendly sanitizers


  • Significantly lower capital cost than traditional stainless steel systems
  • No utility requirement for steam/heated water
  • Lower operating cost; no requirement to power expensive, energy consuming heaters or stills
  • Easily installed, modified, and expanded
  • Design thru Validation capabilities from a single vendor
  • Green design