Why Choose Our Valve Body Casting
- 27 years of experience in manufacturing valve body castings
- Advanced CNC machining capabilities
- Use 304/316L and tin bronze to make valve body castings
- Provide Spectrometer Analysis
- 100% Hydrostatic & Air Testing Process
- Provide Salt Spray Test
Valve Body Casting Foundry in China
As a professional valve body investment casting foundry in China, we are committed to providing you with custom valve body castings made of 304/316L stainless steel and tin bronze that offer high-pressure resistance, airtightness, and crack resistance. Over the past 27 years, we have established long-term, stable partnerships with nine companies, achieving an annual output value of $8 million.
We have also helped numerous clients resolve valve body-related issues.
- Employing ASTM A967 standard pickling and passivation to prevent the valve body casting from rusting during maritime transport
- Using 100% Hydrostatic and Air Pressure Testing to ensure the valve body meets internal airtightness requirements and to prevent cracking during operation
- Applying DFM design principles to help customers optimize valve body casting wall thickness without compromising product functionality, thereby preventing shrinkage cavities that could lead to cracking.
Valve Body Castings We Make
Made of stainless steel, this type can withstand extreme pressures and is primarily used to shut off or regulate the flow of liquids in pipelines, usually used for ball valve body casting
Made of stainless steel, this type regulates the flow of exhaust gas recirculated into the intake manifold and is mainly used in exhaust gas recirculation systems
The multi-port internal channels in this type transport fluid to different outlets. Made of stainless steel, they are widely used in industrial hydraulic systems and chemical pipelines
Made of tin bronze, this type offers excellent resistance to seawater corrosion and strong self-lubricating properties. They are widely used in marine engineering
Why do you need valve body castings made from 304/316L stainless steel or tin bronze?
The film formed on the surface effectively prevents corrosive media from contaminating the transported liquid
Due to its chemical stability, stainless steel does not leach heavy metal ions to contaminate the flowing fluids
Stainless steel ensures that the casting does not oxidize at high temperatures and does not crack under impact at low temperatures
When the valve body casting is subjected to violent impacts, it can absorb this destructive force through tiny elastic deformation
The friction coefficient of tin bronze is as low as 0.02–0.04, ensuring the valve body casting does not seize against the valve core
SPECTRO spectrometer
We conduct two sets of spectral analysis to strictly monitor the chromium, nickel, and molybdenum content in 304/316L stainless steel and the plumbum and tin content in tin bronze before and after manufacturing. This ensures that the material meets your requirements and effectively prevents valve body castings from corrosion, perforation, and seizing of the valve core that could occur later on due to substandard material.
Rapid Prototype Valve Body Casting
The 3D printing technology we use not only significantly shortens your R&D cycle but also enables us to manufacture valve body castings with complex internal flow paths or non-uniform wall thicknesses, which are difficult to achieve with traditional metal molds. This design minimizes fluid resistance during operation and improves the overall efficiency of the valve system.
Provide Standard pickling and passivation
We will pickle and passivate the valve body casting using solutions of varying concentrations based on the material of your valve body casting. This can thoroughly remove oxides from the valve body’s surface and the interior, ensuring that the internal flow passages remain smooth. It also enhances the valve body’s corrosion resistance, extending its service life in environments with corrosive media.
Provide DFM Design Services
We can provide DFM design for your valve body casting from the start of the design. We can offer recommendations for fine-tuning wall thickness to prevent casting shrinkage and porosity inside the valve body casting. We also recommend slight adjustments to the angles of internal cavities to prevent dead corners or excessively narrow gaps that could cause excessive fluid resistance during valve operation.
Certified to Meet Global Industrial Standards
Your Reliable Manufacturing Partner for Valve Body Casting
With 27 years of precision investment casting experience, 18 years of machining experience, and 11 years of mold development experience, we have full casting capabilities for customizing valve body castings based on your specific designs, such as interlaced multi-pass flow channels, internally tapered streamlined cavities, and internal transition structures with significant variations in thickness.
Furthermore, as a one-stop-shop facility, we can provide you with consistent, high-quality valve body castings. More importantly, our company is equipped with professional testing equipment, including a HEXAGON coordinate measuring machine. This machine ensures absolute precision in the internal structure of the valve body casting, particularly the parallelism of the flange faces and the coaxiality of the stem bore with the seat centerline. This effectively prevents uneven stress distribution during valve operation caused by deviations in coaxiality, which can lead to rapid wear of the seal rings and minor external leakage.
Diverse Applications for High-Precision Valve Body Castings
Because hydrogen sulfide in crude oil is corrosive, ordinary steel can suffer sudden fracture due to hydrogen embrittlement within a matter of weeks. Additionally, the internal flow passages of the valve body gradually become clogged with sand, which also leads to leaks. In contrast, a valve body casting made of stainless steel, especially 316 grade, offers excellent resistance to pitting corrosion caused by sulfides. Furthermore, its high tensile strength and toughness enable it to withstand abrasion from sand and gravel in high-velocity fluid flows.
Both of these industries require regular cleaning and sterilization, involving the use of strong acids, strong alkalis, and high-temperature steam to clean the interior of valve bodies. Valve bodies made of ordinary metals would quickly corrode and crack under such conditions. Furthermore, under high-speed impact, ordinary metals can leach heavy metal ions that contaminate the fluid inside. In contrast, stainless steel valve body castings feature a dense passivation layer on their surface. Even when subjected to fluid impact, they never leach contaminating ions. Additionally, the investment casting process ensures an exceptionally smooth interior with no dead corners.
At -196°C, valve bodies made of ordinary metals are highly susceptible to cold-brittle fracture when subjected to sudden fluid impacts. Additionally, the valve body casting would shrink at low temperatures, causing misalignment of the internal sealing surfaces. Both of these factors can lead to internal fluid leakage. In contrast, valve bodies made of stainless steel and tin bronze retain their toughness and dimensional stability in low-temperature environments. They ensure a perfect seal between the valve seat and the valve core even in that situation, thereby minimizing fluid leakage.
Seawater contains extremely high levels of chloride ions. Valve body castings made of ordinary steel are highly susceptible to pitting corrosion, and during operation, this casting may seize up with the valve core, rendering the entire system inoperable. In contrast, valve body castings made of tin bronze are coated with a layer of copper chloride that resists chloride ion corrosion. These castings also possess self-lubricating properties, which significantly reduce the possibility of seizing with the valve core. Furthermore, the released copper ions provide natural biofouling protection, preventing the flow passages from becoming blocked by marine organisms.
Our valve bodies need to operate in low-temperature environments. We’ve tried valve bodies from many manufacturers in the past, but none of them could function properly for extended periods in such low temperatures. That is, until we started using the stainless steel valve bodies made by Pingheng Machinery. We were truly impressed by their dimensional stability and toughness in such conditions, and I believe we will continue to work with them in the future.
——Marcus Thorne, Chief Engineering Officer
We’ve purchased valve bodies from many manufacturers, but they’re prone to corrosion and breakage during operation and frequently get stuck. This has severely impacted our system. The tin-bronze valve bodies manufactured by Pingheng Machinery saved us. Not only are they corrosion-resistant, but they also operate smoothly. It’s wonderful!
——Arthur Pendelton, QA Inspection Director
We will conduct a salt spray test to verify pickling and passivation quality: place the casting in a salt spray chamber and subject it to continuous spraying for at least 24 hours, then inspect the valve body for rust.
We perform radiographic testing to ensure there are no invisible shrinkage cavities or cracks inside the valve bodies.
Valve body castings made of stainless steel are more corrosion-resistant and hygienic, making them commonly used in food processing and chemical engineering. In contrast, valve body castings made of tin bronze offer superior resistance to pitting corrosion, and their self-lubricating properties make them widely used in marine engineering.
We use a one-stop customization service, from mold design and fabrication to CNC machining. In this process, our valve body castings can typically be delivered within 45 days.
