M-b-348: Waukesha Cherry-Burrell W75RS PMO Double Seat Mix-Proof Valve 1"-4" inch (Spill-Free Design)

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October 10, 2004

TO: All Regional Food and Drug Directors
Attn: Regional Milk Specialists

FROM: Milk Safety Branch (HFS-626)

SUBJECT: Waukesha Cherry-Burrell W75RS PMO Double Seat Mix-Proof Valve 1"-4" inch (Spill-Free Design)

In accordance with M-I-00-2, Milk and Milk Product Equipment-A Guideline for Evaluating Construction, the Food and Drug Administration's (FDA) Central Region Milk Specialists and CFSAN's Milk Safety Team have evaluated this Mix-Proof Valve and have validated the technical information reviewed and submitted by the Atlantic-Midwest Dairy Equipment Review Committee (AMDERC) addressing the Waukesha Cherry-Burrell W75RS PMO Double Seat Mix-Proof Valve 1"- 4" inch (Spill-Free Design). When constructed, installed and operated as described in this memorandum, this Mix-Proof Valve has been found to meet the applicable provisions of the Grade "A" Pasteurized Milk Ordinance (PMO), when used to separate cleaning product solution and milk and milk products.

Waukesha Cherry-Burrell W75RS PMO Double Seat Mix-Proof Valve 1"- 4" inch (Spill-Free Design) is a single-bodied double seat valve designed to comply with Item 15p. PROTECTION FROM CONTAMINATION, 15p(B) of the PMO. The valve may be used as part of a fail-safe system to separate milk and milk products from tanks or circuits containing cleaning and/or sanitizing solution.

Compliance with the PMO is based upon construction, installation, and operation as described in the manufacturer's Operation and Maintenance Manual, October 2004, publication #95-03076.

The technical information that was reviewed addressing the Waukesha Cherry-Burrell W75RS Double Seat Mix-Proof Valve 1"- 4" inch (Spill-Free Design) constitutes the AMDERC's Engineering Design and Technical Construction File (EDTCF). The Table of Contents for this file is attached. The material in the EDTCF is the property of the manufacturer and may be shown at their discretion. For additional information regarding this equipment and to request copies of the documents, please contact:

Patrick Sibley
Waukesha Cherry Burrell
611 Sugar Creek Road
Delavan, WI53115
Phone: (262) 728-1900
Fax: (262) 728-4904

FDA's review and acceptance of this piece of equipment does not constitute agency endorsement or approval. Any representation on a label or in printed literature citing or indicating "FDA Approval" is false and misleading.

An electronic version of this memorandum is available for distribution to Regional Milk Specialists, State Milk Regulatory Agencies and State Milk Sanitation Rating Officers in your region. The electronic version should be widely distributed to representatives of the dairy industry and other interested parties and will also be available on the FDA Web Site at at a later date.

If you would like an electronic version of this document prior to it being available on the CFSAN Web Site, please e-mail your request to


Donald R. Goldsmith
Regional Milk Specialist
FDA Central Region


Jonathan M. Gardner
Milk Sanitation Officer



Valve Literature
Table of Contents
Test Procedures

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