| Tungsten Carbide Valve Seats | ||
| Size Range | 1/2" to 56" (Custom sizes available) | |
| Pressure Rating | PN10-PN420 (Class150-2500) | |
| 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) INCONEL625, INCONEL718, INCONEL825, Monel 400, Monel 500 etc |
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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. | |
| Operating Temperature Range | ≤1200°C | |
| Parameter Category | Core Technical Parameters | Standards for Determining Advanced Technological Level |
| Machining Seat accuracy | ≤ 0.025 mm | ≤ 0.005 mm (Ultra-High Precision) |
| Processing Seat Roundness | ≤ 0.025 mm | ≤ 0.011 mm (Micron-Level ) |
| Seatsconcentricity | ≤ 0.025 mm | ≤ 0.005 mm (Ultra-High Precision) |
| Other supplements | ≤ 0.4 μm | ≤ 0.1 μm (Mirror-Level) |
| Parameter Category | Core Technical Parameters | Criteria for High-End Technical Level |
| Coating Thickness Control | Thickness Uniformity | Thickness deviation at any spherical position ≤±8% (stricter than the general ±10% standard) |
| 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) | |
| Coating Adhesion Performance | Surface Hardness | HV 1300+ |
| Bond StrengthBond Strength | ≥80 MPa | |
| Interface PorosityInterface Porosity | <0.5% | |
| Coating Surface Quality | Surface Roughness (Ra) | ≤0.2 µm |
| Spraying Accuracy (Positioning & Coverage) | Spraying Positioning Accuracy | ±0.1mm |
The Fusion of Precision Welding and Classic Material
The success of a Welded stainless steel overlaid valve seats hinges on our profound understanding and precise control of the cladding process.
The Widely Embraced Star Material: 316L Stainless Steel
Among numerous stainless steel grades, 316L stainless steel overlaid valve seats are a mainstream choice due to their excellent all-around properties. The addition of molybdenum provides better resistance to chloride pitting and crevice corrosion than 304 stainless, while the low carbon content reduces susceptibility to intergranular corrosion in the weld heat-affected zone. Through our overlaying process, this high-quality 316L alloy is firmly bonded to the substrate, providing reliable protection for the core sealing surface.
Reliable Metallurgical Bonding Process
We employ advanced automated Plasma Transferred Arc (PTA) or Gas Tungsten Arc Welding (GTAW) processes for cladding. Stringent process control ensures the clad layer has stable chemical composition, low dilution, and achieves perfect metallurgical bonding with the substrate, fundamentally eliminating any risk of delamination. The resulting Welded SS Valve Seats offer stainless steel sealing layer performance comparable to solid stainless steel seats, but at a significantly lower cost.
Representing the Quality and Value of "Made-in-China" Expertise
For global clients, the decision to Buy China valve seats centers on exceptional value and stable supply capability. TongBall Valve, with its refined manufacturing processes, stringent quality control systems, and adherence to international standards, ensures that every overlaid seat we supply meets or exceeds customer expectations. We are not just a supplier, but a strategic partner in enhancing your equipment reliability and optimizing procurement costs.
Why Choose TongBall's Stainless Steel Overlaid Valve Seats?
Outstanding Cost-Performance Ratio
While meeting corrosion and wear resistance needs, the overlay solution offers substantial savings on costly alloy materials compared to solid stainless steel seats, making it an economical and effective choice for performance enhancement.
Powerful Repair and Remanufacturing Capability
This technology can efficiently repair existing seats that have failed due to corrosion or wear, restoring their performance and extending the overall valve service life, achieving cost reduction and efficiency improvement.
Robust and Reliable Bond Integrity
Our cladding process ensures the stainless steel layer is bonded to the substrate as strongly as "steel and bone," capable of withstanding high pressure, impact, and thermal cycling.
Responsive Customization Service
We can recommend the most suitable cladding material and process based on your specific operating conditions (media, pressure, temperature) and provide flexible volume production and delivery support.
When you seek a reliable valve seat solution that can resist common corrosion and wear while strictly controlling procurement budgets, stainless steel overlay technology presents a time-tested and intelligent choice. Choosing TongBall means acquiring a high-quality industrial component from China that combines exquisite craftsmanship with exceptional value.
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