Disc-Type Valves (57-02) Is Open for Public Comment. Here's Why Your Input Matters.

If you build disc-type valves, run them in a plant or inspect them for a living, this one's for you.

The Disc-Type Valves (57-02) Ad Hoc Working Group has finished its draft revision, and it's now open for public comment. From Oct. 1 to Nov. 16, 2026, anyone can review the proposal and tell the working group what they think.

What's Changing

3-A SSI recently revised its General Requirements (00-02), the baseline hygienic design criteria that every equipment standard builds on. Proposal B-57-02-A (N657) brings the disc-type valves standard into alignment with that update.

That matters because the General Requirements set the floor, and each equipment standard decides how to apply it. Under the 3-A SSI A- and B-level system, a revised 57-02 standard with  specific rules for disc-type valves applies, including any exceptions to the general requirements.

Where the Working Group Needs Your Eyes

The review centers on five permissions in the General Requirements and how a revised 57-02 will use them:

• Rubber components beyond seals. When rubber can be used in product contact for parts other than seals (GR D1.2.1; 57-02 D1.2.1).
• Plastic components beyond seals. A proposed allowance for specific plastic components (GR D1.2.2; 57-02 D1.2.2).
• Radii exceptions. How exceptions to radius requirements apply to these valves (GR E9.1.1.1; 57-02 E6.1.1).
• Coil springs. A proposed new clause (GR E11.1; 57-02 E11).
• Product contact bearings. A proposed new clause (GR E13.1; 57-02 E13).

See something outside those five clauses? Say so. Comments on any part of the standard are welcome.

Why Your Voice Counts

Standards work best when the people closest to the equipment help shape them. Fabricators know what can be built. Processors know what holds up through production and cleaning. Regulators know what passes inspection. A revision that hears from all three is one the whole industry can use. Comments from other stakeholders are also encouraged.

"A standard is only as strong as the industry input behind it," says Eric Schweitzer, 3-A SSI director of standards and certifications. "Food processors, equipment manufacturers and regulators each see disc-type valves from a different angle. When all three weigh in, the revision reflects how this equipment is actually built, cleaned and inspected."

Commenting: As Easy as 1-2-3

1. Request the review packet by clicking here. You'll receive the current standard, the General Requirements, and the proposal.
2. Review the changes. Proposed deletions and additions are easily identified.
3. Submit your comments by clicking here. Be sure to comment by Nov. 16, 2026.

Questions?

Contact Eric Schweitzer at erics@3-a.org.

The working group did the drafting. Now it's your turn to make sure they got it right.