The global market for investment casting pump and valve parts is currently navigating a transformative era driven by the dual pressures of energy transition and the demand for high-performance materials. As critical components in fluid handling systems, pump housings, impellers, and valve bodies manufactured via the "lost wax" process are seeing unprecedented demand in sectors ranging from green hydrogen production to deep-sea desalination plants.
In the North American and European markets, there is a distinct shift toward super-alloys and duplex stainless steels to handle corrosive environments in chemical processing. Meanwhile, the Asian manufacturing hub, led by Tier-1 suppliers like JUNLONG Machinery, is integrating AI-driven simulation and automated shelling to provide the tight tolerances (±0.1mm) required by modern automated assemblies.
Founded in 2014 and situated in Weifang, Shandong, JUNLONG has established itself as a cornerstone of high-quality precision casting. Spanning 60,000 square meters, we have mastered the art and science of working with carbon steel, alloy steel, and stainless steel.
Our facility integrates the entire value chain—from initial mold design using CAD/CAM to high-precision machining and surface treatment, ensuring a "One-Stop Shop" experience for global OEMs.
Utilizing ProCAST and MagmaSoft to simulate thermal flow and solidification. This eliminates internal defects like shrinkage and gas porosity before the first wax is even injected.
Automation in the ceramic coating process ensures uniform shell thickness, which is vital for the dimensional stability of complex valve internal galleries.
3D printing of wax patterns for low-volume, high-complexity prototypes, allowing OEMs to bypass mold costs for R&D phases of new pump designs.
Precision cast impellers for centrifugal pumps used in large-scale irrigation systems. Our Q345 carbon steel parts offer superior wear resistance against silty water.
High-pressure valve bodies and oil cable protectors. Engineered to withstand extreme PSI and corrosive sour gas environments in offshore rigs.
Precision alloy components for braking systems and fluid control in high-speed rail, where reliability is non-negotiable.
Our competitive advantage lies in the Full Industrial Chain Integration. We don't just "pour metal"; we provide engineered solutions. Our facility is equipped with:
Vertical and Horizontal Machining Centers (CNC) ensure that investment castings meet the exact tolerances required for mechanical seals and valve seats.
On-site Spectrometers, Tensile Testing, and X-ray flaw detection guarantee that every batch of 304/316 stainless steel meets ASTM and EN standards.
Electropolishing, passivation, and sandblasting services to meet the aesthetic and functional needs of the pharmaceutical and food industries.
Our adherence to international standards is verified by ISO 9001, TS 16949, and UL certifications. We employ a rigorous TQM (Total Quality Management) system where every part is traceable from the raw material melt to the final shipping crate.
Investment casting allows for thinner wall sections and more complex internal geometries (like spiral flow paths) which are impossible in sand casting. It also offers superior surface finish, reducing the need for extensive secondary machining and improving the flow coefficient (Cv) of the valve.
We perform 100% spectral analysis on every heat of metal before pouring. For high-pressure applications, we also provide ultrasonic (UT) and magnetic particle inspection (MPI) to ensure there are no subsurface inclusions or cracks.
Yes. Beyond standard 304/316 and WCB/LCC, we specialize in high-nickel alloys, Monel, and Hastelloy for extreme corrosive chemical environments.
Typically, mold design and manufacturing take 3-4 weeks. First Article Inspection (FAI) samples are usually delivered within 5-6 weeks from design approval.
Junlong
