• Adopts double-disc bidirectional elastic sealing, featuring flexible, rapid opening and closing with reliable sealing.
• Employs rubber sealing and water dual-sealing, completely isolating the system from the atmosphere and ensuring excellent airtightness.
• Internal connecting parts of the valve are made of stainless steel, providing durability and a long service life.
• Utilizes high-performance packing with extremely low frictional resistance, self-lubricating properties, and resistance to coal gas and various corrosive gases, ensuring flexible operation and reliable sealing.
• The valve bottom is equipped with a drain ball valve, which allows cleaning of the valve cavity during drainage and facilitates the removal of impurities accumulated in the valve body along with water.
• Typically installed vertically; please specify if special requirements exist.

Purpose

This series of valves features excellent self-sealing performance and is equipped with an external injection system. When closing the valve, water or nitrogen can be injected into the valve cavity via the injection system to isolate the medium, achieving system isolation from the atmosphere and ensuring excellent airtightness. This series of valves is installed on clean coal gas pipelines such as various coal gases, liquefied gas, natural gas, and mine gas as shut-off devices, mainly used in coal gas distribution networks in industries like coal gasification, metallurgy, coking, and chemical engineering. This series of valves combines the dual sealing performance of flexible and rigid sealing, achieving the functions of a butterfly valve + blind plate valve. This valve must not be used for flow regulation.

​