Mueller WFI tanks are engineered specifically for the special needs of the pharmaceutical and biotech industry. They consist of a Type 316L stainless steel vessel and utilize sanitary clamp-style connections, an aseptic manway, and a sprayball for interior sanitization. Chloride-free insulation surrounds the tank's sides and bottom covered with type 304 stainless steel outer sheathing. The vessel and all components are fabricated to the requirements of ASME Section VIII, Division 1. Standard tank sizes range from 250- to 10,000-gallons (945- to 37,800-liters) to satisfy a broad spectrum of capacity requirements. Custom fabrication is also available.

Features and Benefits

Seismic design. Strong enough to withstand earthquakes up to and including zone-four conditions.
Insulated sides and bottom of vessel helps maintain WFI temperature.
Standard tanks with capacities from 250 to 10,000 gallons. Custom sizes and dimensions available. Broad range of sizes to meet your specific storage needs.
With over 60 years experience in stainless steel fabrication and finishing, quality and reliability in design and construction are assured.
Can be integrated with Mueller PyroPure stills or pure steam generators and tested as a system prior to shipment. Speeds installation by pre-assembly and shop fit-up.
CIP coverage/FAT testing available. Each tank comes with a complete documentation package which speeds validation of your system.

WFI Storage Tank Components

Vessel
The ASME code-stamped WFI vessel has a rating of 40 psig and full vacuum at 300°F. Interior surfaces are mechanically polished to 25 Ra Max (BPE SFVV6) and then electropolished to maintain optimum sanitary conditions. Exterior surfaces are 2B or mill finish with welds buffed. Mechanically polished material and/or flush ground weld finishes to 32 Ra Max (BPE SFVV6) are available options.

Aseptic Manway
The 18" hinged opening meets cGMPs standards for validation ease. It has an EPDM o-ring seal and is made of Type 316L stainless steel to match the vessel. It may be centered on top of the vessel or located off-center depending upon installation requirements. Silicone and Viton o-rings are available options.

Connections
Standard sanitary clamp-type connections include an outlet connection, inlet connection, CIP/SIP connection, vent connection, rupture disk connection, pressure gauge connection, upper and lower level connection, temperature thermowell connection, and a spare connection.

Insulation
A 2" chloride-free insulation surrounds the sides and bottom of each WFI vessel. A 12-gauge Type 304 stainless steel sheathing is welded around the insulation to seal it from moisture.

Sanitary Spray Ball
When connected to a CIP or SIP system, the spray ball will rinse the vessel interior and top head with hot water to keep the tank environment sanitary. The spray ball and its components are removable for cleaning and inspection. The ball is constructed of electropolished Type 316L stainless steel. CIP coverage testing available.

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