Demailong company specializes in producing plug valves, possessing exquisite craftsmanship and a full set of processing equipment. Our products are widely used in industries such as petroleum, chemical, natural gas, fertilizer, metallurgy, pharmaceutical, pharmaceutical, electric power, mining, and construction. The company's quality policy is: "Ensuring customer confidence is our eternal goal, and continuous improvement is the foundation for our survival and development." Adhering to a quality philosophy that pursues high standards and serves society, it has established a strong corporate image in intense market competition, with rapid development and continuously growing technical capabilities. The products have earned the trust and consistent praise of a wide range of users due to their excellent quality, ideal pricing, complete variety, timely delivery, and satisfactory pre-sales, in-sales, and after-sales services.

Demailong company pledge "Choose Demelon with Confidence" based on our long-term reliable quality and reputation, as well as excellent service awareness. Over the years, we have been continuously developing and researching new products to meet the diverse needs of different consumer levels in the market. Demelon relieves you of every minor concern. Our quality and reputation have earned widespread praise from customers across various regions, who are eager to purchase our company's products. We also welcome friends from all sectors to submit samples or designs for processing and manufacturing.

● Pressure-balanced inverted oil-sealed plug valve
● Lifting-type hard-sealed plug valve
● Cartridge soft-sealed plug valve
● Orbit-type plug valve(General Valve)

● Oil & Gas
● Petrochemical industry