Yongjia Tong Ball Valve Co., Ltd.: Your Professional 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 Valve Stems
Quick switch
Just 90° rotation to fully open or close.
Reliable sealing
Relying on ball valve stem packing and ball valve stem seal to effectively prevent leakage.
Easy to operate
It can be easily operated with a ball valve stem wrench or automatic actuator.
Multifunctional adaptation
Optional ball valve stem adapter or ball valve stem extension kit can be used to meet different working conditions.
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 |
Maintenance Tips for Valve Stems
Regular inspections
Conduct routine visual and functional checks for signs of wear, pitting, corrosion, or bending. Pay close attention to areas near the seal interface and threaded sections, which are prone to degradation.
Cleaning procedures
Clean stems periodically using mild soap and water or industry-approved cleaning agents. Avoid abrasive materials that can scratch surfaces and compromise seal integrity. Remove built-up debris, scale, or chemical residues that may impair movement.
Proper lubrication
Apply manufacturer-recommended lubricants to reduce friction and prevent galling, especially on threaded and sliding surfaces. Over-lubrication should be avoided as it can attract contaminants and degrade certain seal materials.
Thread and seal inspection
Examine threads for stripping or damage and replace damaged components promptly. Check O-rings and lip seals for cracking, swelling, or extrusion—replace them at the first sign of deterioration to prevent leaks.
Corrosion protection
For valves exposed to moisture, salt, or chemicals, implement protective strategies such as reapplying protective coatings, using corrosion inhibitors, or installing protective boots or caps when idle.
Maintenance record keeping
Document all inspection, cleaning, lubrication, repair, and replacement activities. A detailed log helps track component lifespan, schedule preventive maintenance, and comply with safety or regulatory standards.
Packaging and Shipping
Certifications
FAQ
With abundant machining experience, we are one of the most professional valve stems manufacturers in China. We warmly welcome you to buy valve stems at competitive price from our factory. If you have any enquiry about cooperation, please feel free to email us.
