Yongjia Tong Ball Valve Co., Ltd.: Your Professional Industrial Valve Stems Manufacturer!
Founded in 2009, Tong Ball Valve Co., Ltd. is a national high-tech enterprise specializing in precision valve balls for severe service applications. We provide reliable solutions for global industrial valve manufacturers through advanced material processing, precision machining, and surface coating technologies. With strict quality control and full production traceability, our products are widely used in oil & gas, petrochemical, power generation, and other demanding industries worldwide.
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Why choose us?
Advanced materials & surface engineering
We specialize in difficult-to-machine materials including duplex stainless steel, titanium, Inconel, zirconium, and engineering ceramics. Combined with HVOF, plasma spray, DLC/TiN coating, and laser cladding technologies, our valve balls deliver excellent wear resistance, corrosion resistance, and long-term sealing performance.
Experienced technical support & global supply
Supported by a technical team with over 30 years of industry experience, we offer customized valve ball solutions based on different application requirements. As an authorized supplier for global companies including Emerson and Flowserve, our products have been exported to more than 20 countries and regions
Precision manufacturing for severe service
Our machining accuracy reaches roundness ≤0.001 mm, supporting stable sealing performance under high pressure, high temperature, and corrosive working conditions. Products are validated through rigorous cycle testing to ensure durability and operational reliability.
Strict quality control & full traceability
From raw material inspection to final testing, every production process follows strict quality standards. We provide 100% inspection and complete production traceability, helping customers reduce quality risks and improve supply chain confidence.
Benefits of Industrial Valve Stems
Anti-blowout protection
High-pressure industrial valves (like ball valves) feature "anti-blowout" stems. This design anchors the stem internally, preventing it from being violently forced out of the valve body by high internal system pressures, keeping workers and equipment safe from accidents.
Enhanced accessibility
In large or complex facilities, valve stems can be extended. Extended stems allow operators to open and close valves safely from the ground or from a distance, minimizing direct exposure to toxic, flammable, or high-temperature fluids.
Precision control
Valve stems transmit rotational or linear motion from the actuator (manual or automated) to the internal disc with high accuracy. This enables precise throttling, flow regulation, and reliable operation in critical vacuum or steam applications.
Leak reduction
Properly designed stems—when paired with industrial-grade packing or bellows—compress to create a tight seal around the moving shaft. This prevents fugitive emissions and hazardous media leaks from escaping the pipeline.
Durable materials
Made from robust metals like stainless steel, titanium, or specialized alloys, valve stems are highly resistant to corrosion, thermal expansion, and mechanical wear. This extends the lifespan of the valve even in corrosive chemical or petrochemical processing environments.
Product Specifications
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Gate Valve Stem |
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Size Range |
1/2" to 56" (Custom sizes available) |
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Pressure Rating |
PN10-PN420 (Class150-2500) |
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Body Material |
A105, A350 LF2, A182 F304, A182 F316, A182 F321, A182 F51, A182 F53, A182 F55, A182 F60, A182 F44, A564 630 (17-4PH) |
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Core Process/Coating |
ENP,HCR,STL6, STL12, STL20,Cr3C2, WC-Co, WC-Cr3C2-Ni, TiC-NiMo, SiC, CrC,ZrO2, Al2O3, Cr2O3, ZnO, TiO, Al2O3-TiO2,STL1, STL6, STL12,Ni60, Ni55, Ni45 etc. |
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Operating Temperature Range |
≤1200°C |
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Parameter Category |
Core Technical Parameters |
Standards for Determining Advanced Technological Level |
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Machining Stem accuracy |
≤ 0.025 mm |
≤ 0.005 mm (Ultra-High Precision) |
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Processing Stem Roundness |
≤ 0.025 mm |
≤ 0.011 mm (Micron-Level ) |
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Other supplements |
≤ 0.4 μm |
≤ 0.1 μm (Mirror-Level) |
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Parameter Category |
Core Technical Parameters |
Criteria for High-End Technical Level |
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Coating Thickness Control |
Thickness Uniformity |
Thickness deviation at any spherical position ≤±8% (stricter than the general ±10% standard) |
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Thickness Tolerance Range |
100 - 300 μm (common range for wear-resistant layers); special ranges can be noted. No missed spraying for ultra-thin coatings (<10μm) |
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Coating Adhesion Performance |
Surface Hardness |
HV 1300+ |
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Bond StrengthBond Strength |
≥80 MPa |
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Interface PorosityInterface Porosity |
<0.5% |
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Coating Surface Quality |
Surface Roughness (Ra) |
≤0.2 µm |
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Spraying Accuracy (Positioning & Coverage) |
Spraying Positioning Accuracy |
±0.1mm |
Outside screw and yoke (OS&Y) rising stem
This valve stem design is characterized by its external threads, which do not come into contact with the fluid medium. The smooth portion of the stem is isolated from the fluid by a packing assembly, effectively reducing the risk of medium leakage.
Inside screw non-rising stem
Non-rising stem designs feature a stationary stem, where the valve disc moves along the stem threads during operation.
Sliding stem
Sliding stems use linear motion instead of rotary motion to control valve opening and closing, often employed in automated control systems requiring rapid response.
Rotary stem
Rotary stems are commonly used in ball valves, plug valves, and butterfly valves, where a quarter-turn rotation suffices for opening or closing.
Packaging and Shipping
Certifications
FAQ
With abundant machining experience, we are one of the most professional industrial valve stems manufacturers in China. We warmly welcome you to buy industrial valve stems at competitive price from our factory. If you have any enquiry about cooperation, please feel free to email us.
Control Valve Stems, Steel v port ball valve stems, API control valve stems
