OverviewThe D643H Pneumatic Hard-Sealed Butterfly Valve is a type of valve that utilizes a metal hard-sealed structure and is driven by compressed air to actuate the disc in a 90° rotary motion, enabling the opening, closing, or regulation of pipeline media. This valve employs a three-dimensional eccentric or multi-eccentric design principle, allowing the disc sealing surface and the valve seat sealing surface to quickly separate and engage during operation, significantly reducing friction and wear. Its transmission mechanism uses the torque output from the pneumatic actuator to drive the valve stem, which precisely rotates the disc within the valve body. Both the valve seat and the disc sealing pair are made of metal materials (such as stainless steel, hard alloys, etc.), processed through specialized techniques to form a high-hardness metal-to-metal seal. The D643H Pneumatic Hard-Sealed Butterfly Valve is particularly suitable for demanding applications involving high temperatures, high pressures, corrosive media, and fluids containing fine solid particles. It is widely used in critical pipelines across industries such as power generation, metallurgy, petrochemicals, and urban heating systems. Product Illustration of D643H Pneumatic Hard Seal Butterfly Valve

D643Y all-metal hard-seal butterfly valve is a metal-sealed valve specially used for high-temperature and high-pressure working conditions. It drives the butterfly plate to perform a 90° rotary motion through worm gear and worm transmission combined with a pneumatic actuator to realize the on-off of pipeline medium and flow regulation. The valve adopts a triple eccentric structural design with a flange connection type. The sealing pair is composed of matched hard metal alloys. The sealing surface of the butterfly plate is surfacing welded with cobalt-based and nickel-based hard alloys, and the valve seat is also equipped with a metal hard sealing surface, which achieves tight fitting relying on the mechanical structure of triple eccentricity. The transmission mechanism amplifies torque through worm gear deceleration and pushes the valve stem to drive the butterfly plate to rotate and close. Featuring high temperature resistance, high pressure resistance, erosion resistance and wear resistance, the metal hard-seal structure is suitable for high-temperature and high-pressure media with no strong corrosion or weak corrosion such as steam, high-temperature flue gas, hot oil, high-temperature gas and pulverized coal flue gas. It is widely applied in pipeline control systems under severe working conditions including thermal power plants, metallurgy, heating pipe networks, petrochemical high-temperature pipelines, HVAC boilers and other fields.

OverviewD671X plastic wafer butterfly valves are all-plastic anti-corrosion butterfly valves engineered for heavily corrosive, normal-temperature, low-pressure and clean chemical working conditions. Different from metal body butterfly valves with metal hard seals or fluororubber soft seals, their valve bodies are integrally injection-molded from engineering plastics such as UPVC, CPVC and PPH, matched with an integral rubber soft sealing structure.Adopting a concentric wafer design, the valve disc rotates 90° via hand lever actuation to achieve pipeline shut-off and simple flow regulation. No worm gear transmission is required, delivering an ultra-simplified structure with direct operation. No metal parts come into contact with process media, thoroughly eliminating issues including corrosion, scaling, rusting and leakage caused by acid, alkali and salt solutions. Rated for PN10 nominal pressure, it suits heavily corrosive fluid services at ambient temperature.Widely adopted in chemical pickling, electroplating, wastewater treatment, pharmaceutical production, swimming pool water treatment and light industry anti-corrosion pipeline systems, it serves as the economical mainstream valve choice for low-pressure highly corrosive conditions.

OverviewD372F/D342F double-eccentric high-performance butterfly valves are soft-seal high-performance valves specially developed for medium and low temperature, medium and low pressure clean working conditions. Different from the triple-eccentric metal hard seal structure, they adopt a mature double-eccentric sealing design. Among them, D372F is a wafer-type connection and D342F is a flange-type connection, adapting to different pipeline installation scenarios. Driven by worm gear and worm manual transmission, equipped with electric, pneumatic, hydraulic and other driving devices, the valve disc rotates 90 degrees to realize the cut-off and flow regulation of pipeline media accurately.Featuring a core double-eccentric mechanical structure with double offset design of valve stem eccentricity and disc sealing surface eccentricity, the valve ensures no friction and no jamming of the sealing pair during opening and closing. The sealing pair is made of high-quality fluoroplastic soft seal material, achieving zero-leakage sealing through elastic compression force during double-eccentric closing. With lightweight structure, sensitive opening and closing and excellent sealing performance, the valve solves the pain points of poor sealing, stuck opening and closing and high resistance of traditional butterfly valves. It is suitable for medium and low temperature clean media such as water, air, gas, oil products and normal-temperature clean fluids without particles and strong corrosion. Widely used in municipal water supply and drainage, HVAC, chemical normal-temperature pipelines, gas transmission, light industry, building automatic control and other general industrial pipeline control systems, it is an optimal energy-saving valve to replace gate valves and globe valves in general working conditions.

OverviewPneumatic dust butterfly valve, also known as powder butterfly valve or cement butterfly valve, is a dedicated pipeline on-off valve developed exclusively for media such as dust, granules, powder and dry bulk materials. Different from valves for anti-corrosion or high-temperature & high-pressure fluid service, it is optimized for dry powder working conditions. Driven by a pneumatic actuator, the valve disc rotates 90° to quickly realize pipeline cut-off, throttling and discharging control. Two standard connection types are available: flanged and wafer.The valve body features a wide, unobstructed flow path without narrow dead zones or accumulation grooves. Matched with a highly wear-resistant resilient sealing structure, it effectively resolves issues like material buildup, jamming and abrasion when handling dry media including cement, fly ash, grain powder, plastic pellets and mineral powder. Benefiting from the fast response of pneumatic actuation, it suits assembly line processes such as automatic batching, dust removal, conveying and silo discharging. Widely deployed in dry powder conveying systems of building materials & cement, powder processing, environmental dust collection, grain storage, plastic chemical industry, mining and metallurgy, it serves as the core control valve for pneumatic powder conveying pipelines.

OverviewThe D641X Pneumatic Flanged Butterfly Valve is a type of valve that uses compressed air as the power source. Driven by a pneumatic actuator, the valve disc performs a 90° rotary motion to achieve rapid on-off operation or proportional control of the pipeline medium. This valve utilizes a flanged connection type, securely fastened to the pipeline flange via bolts for reliable connection. Its core transmission mechanism directly transfers the linear or rotary output torque from the pneumatic actuator to the valve stem through connecting components, driving the valve stem and the attached disc to rotate precisely within the valve body cavity. The sealing surface of the disc is typically lined with elastic materials such as rubber, forming an interference fit with the metal or non-metal seat inside the valve body to achieve bi-directional soft sealing. The D641X Pneumatic Butterfly Valve features rapid actuation, convenient control, and high integration capability for remote and automated operations. It is widely used in industrial automation control systems across sectors such as petroleum, chemical, power, metallurgy, and environmental protection.Product Diagram of D641X Pneumatic Flanged Butterfly Valve

OverviewThe D671X Pneumatic Wafer Butterfly Valve is an automated valve designed for the rapid on/off operation or regulation of pipeline fluid flow. Utilizing compressed air as the power source, it employs a pneumatic actuator to drive a 90-degree rotation of the disc. The valve features a wafer-style connection, where it is directly clamped between two pipeline flanges via bolts on both sides of its body, resulting in a compact installation with minimal spatial footprint. The pneumatic actuator converts air pressure into rotary torque, which precisely drives the valve stem and the connected disc within the valve body. The disc's sealing surface is integrally lined with an elastic material such as rubber, forming a soft seal through an interference fit with the valve body. During the opening and closing process, the disc quickly disengages from and re-engages with the valve seat, enabling highly efficient fluid control. Characterized by fast response, ease of operation, and a high degree of automation, the D671X Pneumatic Wafer Butterfly Valve is widely used in water supply and drainage, fire protection, HVAC systems, and various industrial automation control applications.D671X Pneumatic Wafer Butterfly Valve Product Diagram