ZHEJIANG, CHINA – April 8, 2026 – Zhejiang Datang Valve Co., Ltd., a professional and reliable manufacturer in the valve industry, is proud to introduce its high-performance Ceramic Lined Dome Valve (Ceramic Dome Valve), specifically engineered to tackle the challenges of high-wear, high-dust, and strong-corrosion working conditions. As a wear-resistant rotary shut-off valve, this innovative product features an alumina ceramic lining inside the valve body, combined with an inflatable seal and a spherical valve core, achieving long service life and zero-leakage material control—setting a new standard for reliability and durability in industrial material handling systems.
In industrial sectors such as power, mining, cement, chemical, and coal/steel, valves are often exposed to harsh operating environments filled with abrasive solid particles, dust, and corrosive media. Traditional valves frequently suffer from rapid wear, leakage, clogging, and short service life under such conditions, leading to frequent maintenance, increased downtime, and rising operational costs. Zhejiang Datang Valve has developed the Ceramic Lined Dome Valve to address these pain points, leveraging advanced materials and innovative design to provide a cost-effective and reliable solution for industrial customers worldwide.
The Ceramic Lined Dome Valve boasts five core functions that make it stand out in harsh industrial environments. First and foremost, it offers wear-resistant on-off control, capable of handling abrasive solid particles and powders such as dry ash, mineral powder, coal cinder, cement, and coke particles with reliable shut-off and conduction performance. This capability ensures stable operation even in the most abrasive material handling scenarios, reducing the risk of valve failure caused by wear.
Zero-leakage sealing is another key function of the valve. When closed, the inflatable seal expands to tightly wrap the spherical valve core, achieving bidirectional zero leakage. This prevents material leakage and cross-contamination, ensuring the safety and efficiency of the entire production system—critical for industries where leakage can lead to environmental pollution, equipment damage, or safety hazards.
The valve also features anti-clogging and self-cleaning capabilities. The spherical rotation and shearing action allow the valve to close even when the pipeline is full of materials, minimizing the risk of clogging. Additionally, the rotating spherical core automatically scrapes off any adhering materials, maintaining smooth flow and reducing maintenance requirements. This self-cleaning design is particularly beneficial for handling sticky or easily caked powders and particles.
With excellent temperature and corrosion resistance, the ceramic lining can withstand high temperatures up to 300℃ and resist acid-alkali corrosion, making the valve suitable for a wide range of harsh working conditions. Whether in high-temperature material conveying systems or corrosive chemical environments, the Ceramic Lined Dome Valve maintains stable performance and long service life.
Low friction and long service life are further advantages of the product. During opening and closing, there is no contact between the valve core and the seal, with a gap of 0.5–1.5mm, resulting in almost no wear. This non-contact movement significantly extends the service life of both the valve core and the seal, reducing the frequency of replacement and maintenance costs.
To understand the superior performance of the Ceramic Lined Dome Valve, it is essential to examine its structure and working principle. The valve core is hemispherical (dome-shaped) with a ceramic or tungsten carbide hardened surface, ensuring exceptional wear resistance and structural stability. The inner flow channel of the valve body is fully lined with alumina ceramic, with a hardness of HRA≥88—far exceeding that of traditional metal materials and providing excellent resistance to abrasion and corrosion.
The seal adopts an inflatable elastic密封圈 (silicone rubber/fluororubber), which can expand and contract freely to achieve reliable sealing. The valve is driven by either pneumatic (commonly used) or electric power, with a 90° rotary opening and closing mechanism that ensures quick and efficient operation. The working process of the valve is streamlined and efficient:
When opening: The seal first deflates and contracts → the valve core rotates → the flow channel is fully open, avoiding material scouring of the seal and valve core. This sequential operation prevents wear caused by direct contact between the seal and flowing materials, further extending the valve's service life.
When closing: The valve core rotates 90° → the seal inflates and expands → tightly clamps the spherical surface → achieves complete sealing. This two-step closing process ensures that the seal only comes into contact with the valve core when fully closed, minimizing wear and ensuring zero leakage even in dusty environments.
The Ceramic Lined Dome Valve also features a range of key performance characteristics that enhance its competitiveness in the industrial valve market. Its ultra-wear resistance is particularly notable: the wear resistance of ceramic is 250 times that of manganese steel, and its service life is 5–10 times longer than that of ordinary valves. This significant lifespan extension translates to lower replacement costs and less downtime for industrial customers, delivering substantial economic benefits.
The inflatable elastic seal ensures reliable sealing performance, achieving zero leakage even in dusty and particle-filled environments—addressing a common pain point of traditional valves in harsh conditions. The valve also has low flow resistance: when fully open, the smooth and straight flow channel minimizes pressure loss, ensuring smooth material transportation and improving the efficiency of the entire conveying system.
Thanks to the non-contact movement between the valve core and the seal, the valve opens and closes smoothly with small torque and no jamming, even after long-term use. Maintenance is also simplified: the seal can be quickly replaced without disassembling the entire valve, and the ceramic lining requires no maintenance, reducing maintenance time and labor costs.
The valve is suitable for a wide temperature range of -20℃ to 300℃, depending on the seal material, making it adaptable to various industrial working conditions—from low-temperature material storage to high-temperature flue gas and material conveying systems.
The Ceramic Lined Dome Valve from Zhejiang Datang Valve has been widely applied in various key industrial sectors, providing reliable material control solutions for each industry:
In the power industry, it is used in power plant pneumatic ash conveying, fly ash, and slag systems, effectively handling the abrasive fly ash and slag generated during power generation, ensuring stable operation of the ash conveying system and reducing environmental pollution.
In the mining/metallurgy industry, the valve is used for the conveying of mineral powder, tailings, and metal powder, withstanding the wear and corrosion of hard mineral particles and ensuring efficient and reliable material transportation throughout the production process.
In the cement industry, it controls the conveying of raw materials, clinker, coal powder, and fly ash, adapting to the high-dust and high-wear environment of cement production and ensuring the smooth operation of the cement manufacturing line.
In the chemical industry, the valve is suitable for handling coke powder, carbon black, catalysts, and corrosive powders, resisting the corrosion of chemical media and ensuring zero leakage to protect the production environment and equipment.
In the coal/steel industry, it is used in coal conveying systems, blast furnace gas ash, and sintering dust handling, withstanding the wear of coal particles and dust and ensuring the stable operation of coal-fired power generation and steel production systems.
“The launch of our Ceramic Lined Dome Valve reflects Zhejiang Datang Valve’s commitment to providing innovative and reliable solutions for harsh industrial conditions,” said a spokesperson for Zhejiang Datang Valve Co., Ltd. “We have always focused on addressing the pain points of industrial customers, and this product integrates advanced ceramic materials and innovative design to achieve long service life, zero leakage, and easy maintenance. We believe it will become a trusted choice for customers in power, mining, cement, chemical, and coal/steel industries worldwide.”
Zhejiang Datang Valve Co., Ltd. has long been dedicated to the R&D, production, and sales of high-quality industrial valves, adhering to strict quality control standards and continuous technological innovation. With its professional R&D team, advanced production equipment, and perfect after-sales service system, the company is committed to providing customers with high-performance, cost-effective valve products and comprehensive solutions. The Ceramic Lined Dome Valve is another masterpiece of the company’s technological innovation, marking its further expansion in the high-end industrial valve market and its commitment to supporting the sustainable development of various industrial sectors.