China Valve And Seat Manufacturers Factory - Valve And Seat Replacement

Yongjia Tong Ball Valve Co., Ltd.: Your Professional Valve And Seat 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.

Globe Valve Seats
Premium Globe Valve Seat Solutions: The Heart of Precise Throttling and Reliable Shut-Off

Where precise flow regulation and dependable isolation converge, the synergy between the valve and seat is tested by dynamic forces...
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Gate Valve Seats
Premium Gate Valve Seat Solutions: Engineered for Uncompromising Shut-Off and Long Service Life

In applications where positive isolation is non-negotiable, the integrity of the valve and seat partnership defines the line...
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Plug Valve Seats
Premium Plug Valve Seat Solutions: Confronting Demanding Service, Delivering Reliable Zero-Leakage Sealing

In critical pipeline applications requiring full shut-off or unrestricted flow, the precise match between...
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Control Valve Seats
Premium Control Valve Seats: The Core of Precise Regulation and Long-Term Sealing

In process control and fluid regulation systems, the synergistic performance of the valve and seat is paramount, directly determining...
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Ball Valve Seats
Premium Ball Valve Seats: Precision, Reliability, Total Compatibility

In demanding industrial applications, the perfect partnership between the valve and seat is fundamental to ensuring system integrity and long-term,...
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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 And Seat

Prevents leaks
Whether handling high-pressure liquids, abrasive slurries, or volatile combustion gases, a tight seal prevents costly and hazardous leaks.

Maintains compression
In engines, a leaking valve can drop power output by up to 25%. A correct valve-and-seat seal ensures 100% of the cylinder's pressure is captured to generate maximum mechanical power.

Cooling effect

The valve seat acts as a thermal conduit, drawing excess heat away from the valve face and safely conducting it into the engine block or fluid body.

Prevents warping

This heat dissipation prevents the valve from warping, cracking, or degrading due to prolonged exposure to intense heat.

Resistant materials

Seats are often built from hardened steel, specialized alloys, or resilient polymers (like PTFE or PEEK) that are designed to endure abrasive fluids, high velocities, and extreme cycling.

Adaptive sealing

Advanced designs in fluid valves allow the seat to maintain elasticity across extreme temperature ranges, automatically compensating for minor wear over time.

Product Specifications

Gate 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
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 )
Seats concentricity	≤ 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)
Coating Thickness Control	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

Application of Valve And Seat

The valve seat is a multi-talented component, performing several vital functions:

01.

Primary sealing:

Its core mission is to create a leak-tight seal with the closure element, preventing fluid from passing when the valve is in the closed position.

02.

Supporting the closure element:

The valve seat bears the force exerted by the closure element and the system pressure, providing stable support when the valve is shut.

03.

Guidance and alignment:

In certain valve types like Globe Valve Seats, the seat often helps guide the plug or disc, ensuring perfect alignment for a uniform and effective seal every time.

04.

Integral part of the pressure boundary:

The seat is a crucial element of the valve’s pressure-containing body, requiring immense strength and stability, especially in high-pressure applications.

Packaging and Shipping

productcate-500-500

productcate-716-385

Certifications

FAQ

Q: What is the working relationship between valve and seat?

A: The valve seat forms a fixed sealing surface inside the valve body, and the valve ball or plug rotates and presses against the seat; their precise contact directly determines the valve’s sealing effect and overall working stability.

Q: What materials are commonly used for valves and seats?

A: Valve bodies are commonly made of stainless steel, carbon steel and brass, while valve seats are available in soft materials like PTFE and rubber, as well as hard materials including stainless steel, alloy and coated composite materials.

Q: Why is the matching degree of valve and seat so important?

A: Poor matching caused by uneven surfaces, incorrect sizes or deformed parts will create gaps between the valve core and seat, resulting in internal leakage, increased operating torque and shortened service life of the entire valve.

Q: What are the differences between soft-seat and hard-seat valves?

A: Soft-seat valves use elastic materials for zero-leakage sealing and suit low-pressure clean media, whereas hard-seat valves adopt metal or alloy seats, featuring high durability for high-temperature, high-pressure and abrasive working conditions.

Q: How to select suitable valves and matching seats?

A: Users need to confirm working pressure, temperature range and medium characteristics first, then select corresponding valve types and choose soft seats for regular environments or reinforced hard/coated seats for harsh industrial pipelines.

Q: How to maintain valves and seats for longer service life?

A: Install filters to block hard impurities, avoid long-term overpressure and over-temperature operation, inspect sealing surfaces regularly, and apply suitable lubricant to reduce friction between the valve core and valve seat.

With abundant machining experience, we are one of the most professional valve and seat manufacturers in China. We warmly welcome you to buy valve and seat at competitive price from our factory. If you have any enquiry about cooperation, please feel free to email us.

Globe Valve Seats, valve and seat, floating ball valve seat