Tantalum-Tungsten Alloy Control Valves: A Chinese Maker Ships a First Unit for an Overseas HPAL Project
A Chinese maker has completed and shipped what it describes as the country's first tantalum-tungsten alloy control valve, an NPS4 Class 600 unit bound for an overseas high-pressure acid leach project.
Lead
Niutuoke Fluid Control Co. (纽托克流体控制有限公司) has completed fabrication, performance verification and factory acceptance of an NPS4, Class 600 control valve built from a tantalum-tungsten alloy, and shipped it for an overseas high-pressure acid leach (HPAL) hydrometallurgy project, according to trade-press coverage of the company's announcement carried by the China General Machinery Industry Association.
Facts
The unit. The valve is an NPS4, Class 600 control valve in a tantalum-tungsten alloy; the maker describes it as the first of its kind produced domestically, with all technical indicators, sealing performance and corrosion-resistance parameters meeting the design standard at factory acceptance. (Source: the company's announcement, carried by trade media and listed by the association, 2026-10-08.)
The duty it is built for. HPAL — high-pressure acid leaching — is a core process route for nickel and cobalt feedstock production, combining strong acidity, strong corrosion, erosion and elevated temperature; the coverage describes the combination as among the most demanding duties in fluid control. (Source: the same.)
The manufacturing problem. Tantalum-tungsten alloys are described as extremely hard and difficult to machine, with heavy tool wear; the maker states it built a complete manufacturing process for the alloy across material proportioning, body design, precision machining, sealing adaptation and extreme-duty simulation testing. (Source: the same.)
The substitution context. The coverage states that HPAL-duty valves of this alloy class were previously available to overseas projects only as imports, with long lead times and high maintenance costs; the maker describes the unit's core parameters as benchmarked against imported equivalents. (Source: the same — the maker's account.)
Where this connects on this site
- Where a control valve sits against the isolation families before material enters the question: Ball vs Gate vs Globe Valves: The Three-Way Comparison
- The order the inputs are read in — function first, class second, material third: Valve Selection Guide: From Function to Class to Material
- The selector: industrialvalveselect.com
Sources
| # | Fact | Source |
|---|---|---|
| 1 | The NPS4 Class 600 tantalum-tungsten alloy control valve: completion of fabrication, performance verification and factory acceptance; shipment for an overseas HPAL hydrometallurgy project; the "first domestic unit" description; the HPAL duty profile (strong acid, strong corrosion, erosion, high temperature); the alloy's machining difficulty; the five workstreams of the maker's development; the benchmarking claim against imported equivalents | 全球阀门网（企业稿）, 2026-10-08 — http://www.famens.com/news-448515.html ｜ 中通协官网行业动态收录, 2026-10-08 — https://www.cgmia.org.cn/?&pageindex=9&pageindex=10 |
Note on sourcing. This item reports a manufacturer's announcement carried by trade media and listed by an industry association. We record the verifiable layer — the valve's size, class, material family and destination duty. First-of-kind and benchmarking claims are reported as the maker's own, and we do not rank or recommend suppliers.
What the source does not state
The reports do not state the destination project or country, the number of units beyond the first, the contract value, the delivery schedule, measured corrosion-rate or cycle-life data, or which imported products the unit is benchmarked against.
Update note
This item is a dated record of a publicly reported shipment. We append corrections rather than rewrite history; corrections are marked Correction with the date.