PFAS-Free Seals: A Huizhou Manufacturer Reports 12 Months of Joint Development With Pump and Valve Customers
A Huizhou seal manufacturer reports that a fluorine-free formulation passed its customers' application validation, after a 12-month joint development with a materials supplier and with pump and valve customers.
Lead
A seal manufacturer in Huizhou, Guangdong reports that a fluorine-free sealing formulation has passed its customers' application validation, following a 12-month joint development programme with a materials supplier and with pump and valve customers.
The company's own account was published on 19 May 2026.
Facts
The stated requirement. The source states that pump and valve customers in the European and American markets asked for seals that hold their sealing performance while containing neither PFAS nor BPA, and that also meet the LFGB food-contact standard.
The source describes this as a change in how seal materials are chosen, from performance alone toward performance, safety and environmental requirements together.
The development route. The materials supplier provided a fluorine-free formulation. The seal maker carried out formulation adjustment, compounding and process control, and moulded the seals. The customer then assembled them and carried out application testing. The source states the programme ran for 12 months. (Source: Huizhou Doit Precision Products Co., Ltd. (惠州杜一特精密制品有限公司), company news, 2026-05-19.)
The application. The seals developed from that formulation are stated to be used in the internal water circuits of drinking-water dispensers and coffee machines — parts described as being in long-term direct contact with drinking water.
The requirements the source lists for that duty are stability in long-term contact with drinking water, structural reliability under hot-cold cycling, and sustained resilience at elevated temperature.
The stated difficulty. The source describes removing PFAS while achieving equivalent performance as the core technical difficulty of the work. Fluorine-containing materials are stated to have inherent advantages in temperature resistance, chemical stability and control of compression set, so a fluorine-free route has to compensate through formulation and process control.
The LFGB standard's limits on material composition and on migration are stated by the source to place further requirements on the whole production process.
The outcome. The company states that the PFAS-free solution passed customer application validation and meets the stated requirements and the standards named above. (Source: Huizhou Doit Precision Products Co., Ltd., company news, 2026-05-19.)
Where this connects on this site
- Where a material rating sits against the temperature it is used at, and why the two are read together: Chemical Compatibility Chart for Pumps: What the Grade and the Temperature Actually Mean
- Why the seal and the wetted parts are separate questions inside the same enquiry: Chemical Pump Selection Guide: Risk, Medium and Duty Point — in That Order
- The selector: chempumpselect.com
Sources
| # | Fact | Source |
|---|---|---|
| 1 | Fluorine-free formulation, 12-month joint development, customers' European and American pump and valve requirement (no PFAS, no BPA, LFGB), drinking-water dispenser and coffee-machine water circuits, stated performance requirements and validation outcome | 惠州杜一特精密制品有限公司, company news — https://www.doitrubber.cn/gongsixinwen/200.html |
Note on sourcing. Item 1 originates as a company development announcement. We report only the verifiable layer — what was developed, over what period, for what stated requirement, and in what application. We do not repeat performance claims, and we do not rank or recommend suppliers.
What the source does not state
The announcement does not state which seal types are involved (O-rings, gaskets, diaphragms or others), the base polymer of the fluorine-free formulation, the operating temperature range, the number of customers involved, or which pump and valve models the seals were validated on.
Update note
Append-only. Corrections marked Correction with date.