Pharmaceutical Water Systems Explained: Purified Water, WFI and Pure Steam

At a glance. Pharma plants use three main grades: purified water (PW), water for injection (WFI) and pure steam. Each needs its own generation, and all need clean storage and distribution.

Purified water

Made by pretreatment, RO and EDI on a purified water generation skid. Used for formulation, cleaning and as feed to WFI and pure steam.

Water for injection

• By distillation in a multi-effect distillation still.

• Or by membranes in a membrane-based cold WFI system, accepted by the European Pharmacopoeia since 2017.

Pure steam

Made from purified water in a pure steam generator for sterilisers and SIP.

Storage and distribution

A storage and distribution skid keeps water moving at controlled temperature, with ozone or UV for ambient and cold loops.

Qualification

Design qualification, FAT, IQ and OQ, then performance qualification over seasons of sampling.

Frequently asked questions

Hot or cold WFI? Hot loops self-sanitise; cold WFI saves energy and uses ozone or periodic hot sanitisation.

Send your user requirements to mail@techincresearch.com for a system proposal.