JUNLONG Machinery Co., Ltd. is not merely a manufacturer but a strategic growth partner for global industrial giants. Located in the industrial heart of Shandong, China, our 60,000 m² state-of-the-art facility bridges the gap between complex metallurgical design and high-volume production efficiency.
With an annual capacity of 20,000 tons, we specialize in high-grade Stainless Steel 304 and 316 valve castings, catering to industries where "failure" is not an option—Petrochemicals, Marine engineering, and High-pressure fluid control.
Decoding the science behind our stainless steel valve casting.
The industry standard for versatility. Comprising 18% chromium and 8% nickel, SS304 provides excellent corrosion resistance in non-saline environments. Ideal for food processing, architectural hardware, and general fluid control.
The "Marine Grade" stainless steel. The addition of 2-3% Molybdenum enhances pitting resistance against chlorides and industrial solvents. Essential for offshore oil platforms, chemical tankers, and high-salinity marine valve systems.
Our precision casting process ensures a surface finish of Ra 3.2 to 6.3μm and dimensional tolerances according to CT4-CT6. This minimizes the need for secondary machining, reducing waste and total cost of ownership (TCO).
Strategically located in Weifang, Shandong, we leverage the world's most robust steel supply chain, ensuring raw material stability and competitive pricing for mid-to-high-end global markets.
We provide localized warehousing and logistics support for clients in Germany, the USA, and Italy, ensuring that your production line never stops due to supply delays.
Our products adhere to ASTM, DIN, JIS, and BS standards. We are ISO 9001 and TS 16949 certified, with UL-listed safety protocols for critical components.
From CAD design to prototype and mass production, we offer a "one-stop" manufacturing partner model, integrating mold design and heat treatment in-house.
The global valve market is shifting towards Smart Manufacturing and Sustainability. As a forward-thinking supplier, JUNLONG integrates:
Expert insights into stainless steel casting procurement.
Usually, mold development takes 2-3 weeks, followed by sample production. Mass production typically ranges from 4-6 weeks depending on quantity and machining complexity.
We use spectral analysis (Spectrometer) on every furnace melt. We provide full Material Test Reports (MTR) according to EN 10204 3.1 standards for every shipment.
Investment casting offers superior surface finish and higher dimensional accuracy. This reduces machining costs and ensures a better seal for high-pressure valve bodies.
Yes, for our global clients, we manage all export/import documentation and can provide DDP shipping solutions to your factory door, simplifying your procurement process.
Equipped with vertical and horizontal CNC machining centers, high-precision lathes, and grinders. We ensure that every valve seat and thread meets the strict tolerances required for leak-proof performance.
Our lab features ultrasonic testing, magnetic particle inspection, X-ray (subcontracted), and 3D CMM measurements. Every valve casting undergoes rigorous pressure testing to ensure structural integrity.
Consult with our expert engineers today for a deep-dive analysis of your casting requirements. Leverage our 20,000-ton capacity and E-E-A-T certified production lines.
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