Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

D643H Pneumatic Metal-Sealed Butterfly Valve
D673H Pneumatic Triple-Eccentric Control Butterfly Valve
ZDG High-Performance Shut-off Butterfly Valve
D671F Pneumatic Fluorine-Lined On-Off Butterfly Valve
D671X Pneumatic Wafer Butterfly Valve
D641X Pneumatic Flanged Butterfly Valve
ZMAW Pneumatic Regulating Butterfly Valve
D641H Pneumatic Flanged Hard-Sealing Butterfly Valve
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Pneumatic Butterfly Valve

Pneumatic butterfly valve is an automated execution valve powered by compressed air. Its core lies in combining butterfly valves with pneumatic actuators (such as single acting spring reset and double acting), driving pistons or gear racks through air sources, and driving the valve stem and butterfly plate to rotate from 0 ° to 90 °, achieving rapid cutting, switching, or proportional adjustment of pipeline media. Pneumatic butterfly valves are mainly composed of valve body, butterfly plate, valve seat, valve stem, pneumatic actuator and auxiliary control components (such as solenoid valve, locator, filter pressure reducing valve), and air source triple components. According to sealing requirements, it can be divided into soft seal type (used for normal temperature and pressure sealing) and metal hard seal type (used for high temperature, high pressure, and abrasive media). The soft seal pneumatic butterfly valve, hard seal pneumatic butterfly valve, clamp pneumatic butterfly valve, flange pneumatic butterfly valve, welded pneumatic butterfly valve, stainless steel pneumatic butterfly valve, sanitary pneumatic butterfly valve, quick installation pneumatic butterfly valve and other pneumatic butterfly valves produced by Kaiweixi Valve have significant advantages of fast action (usually only a few seconds for opening and closing) and high safety (essentially explosion-proof). It can be flexibly connected to the automation control system by receiving switch signals or analog control signals, and is a key equipment for emergency shutdown, process adjustment, and remote control.

D643H Pneumatic Metal-Sealed Butterfly Valve

Model：
D643H-10C/D643H-16C/D643H-25C/D643H-10P/D643H-16P/D643H-25P/D643H-10R/D643H-16R/D643H-25R
Specification：
DN50-DN1200
Pressure：
PN10~PN25
Material：
Cast iron, ductile iron, stainless steel

OverviewD643H Pneumatic Metal Hard Sealing Butterfly Valve is a valve that adopts a metal hard sealing structure and uses compressed air as power to drive the disc in a 90° rotary motion, achieving opening/closing or regulation of pipeline media. The valve utilizes a triple-eccentric or multi-eccentric design principle, allowing the disc sealing surface to quickly disengage from and engage with the seat sealing surface during opening and closing, significantly reducing friction and wear. Its transmission mechanism outputs torque through a pneumatic actuator, driving the stem to rotate the disc precisely within the valve body. Both the seat and disc sealing pair are made of metal materials (such as cast iron, ductile iron, stainless steel, etc.), processed through special techniques to form a high-hardness metal-to-metal seal. The D643H pneumatic metal hard sealing butterfly valve is particularly suitable for severe service conditions involving high temperature, high pressure, corrosive media, and the presence of small solid particles, and is widely used in critical piping systems of industrial fields such as power, metallurgy, petrochemical, and district heating. Product Illustration of D643H Pneumatic Hard Seal Butterfly Valve

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D673H Pneumatic Triple-Eccentric Control Butterfly Valve

Model：
D673H-10C/D673H-16C/D673H-25C/D673H-10P/D673H-16P/D673H-25P/D673H-10R/D673H-16R/D673H-25R
Specification：
DN50~400
Pressure：
PN1.0～2.5MPa
Material：
Cast steel, stainless steel, duplex stainless steel

The D673H pneumatic triple-offset regulating butterfly valve is an industrial automation execution unit consisting of a high-performance pneumatic piston actuator and a triple-offset multi-level hard-seated butterfly valve body. By receiving standard 4-20mA DC analog signals from the control system, the electro-pneumatic positioner converts the signal into pneumatic power to drive the disc rotation within a 0-90 degree range. Its unique triple-offset design (shaft offset from flow center, shaft offset from seal center, and seal cone axis offset from flow axis) allows the disc to detach from the seat instantly upon opening, fundamentally eliminating mechanical friction and wear between sealing pairs. Featuring a metal hard-seal structure, this series offers high temperature/pressure resistance, erosion resistance, and tight shut-off, making it ideal for petroleum, chemical, power, and metallurgy industries where precise regulation and harsh conditions coexist.Product Image of D673H Pneumatic Triple-Eccentric Control Butterfly Valve

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ZDG High-Performance Shut-off Butterfly Valve

Model：
ZDG43H-16C/ZDG43H-25C/ZDG43H-40C/ZDG43H-64C/ZDG43Y-16P/ZDG43Y-25P/ZDG43Y-40P/ZDG43Y-64P
Specification：
DN50~500
Pressure：
PN1.6～6.4MPa
Material：
Carbon steel, stainless steel

The ZDG high-performance shut-off butterfly valve is a high-end pipeline control unit integrating a high-thrust electric actuator with a precision eccentric butterfly valve body. Specifically engineered for large-diameter, high-differential pressure conditions in industrial systems that require strict isolation, the valve utilizes high torque from the actuator to rotate the disc 0-90 degrees for instantaneous shut-off or opening. Utilizing advanced double or triple offset structures, this series offers low operating torque, minimal sealing surface wear, and high sealing reliability, serving as a superior alternative to bulky traditional gate or ball valves. The ZDG series maintains excellent shut-off performance in high-temperature and high-pressure environments and is widely used in safety control loops for petroleum, chemical, power, and district heating industries due to its erosion-resistant design.Product Image of ZDG High-Performance Shut-off Butterfly Valve

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D671F Pneumatic Fluorine-Lined On-Off Butterfly Valve

Model：
D671F-10C/D671F-16C/D671F-25C/D671F-10P/D671F-16P/D671F-25P
Specification：
DN50~400
Pressure：
PN1.0～2.5MPa
Material：
WCB+PTFE, CF8+PTFE

The D671F pneumatic fluorine-lined shut-off butterfly valve is an industrial automation execution unit specifically engineered for harsh and highly corrosive working conditions. This valve integrates a high-performance pneumatic piston actuator with a fully lined centerline butterfly valve body. The core technology involves an overall molded lining of F46 (FEP) or PTFE on the internal cavity and disc surfaces, completely isolating the medium from the metal substrate. By receiving air signals from control systems, the actuator drives the disc to rotate within a 0-90 degree range, achieving rapid shut-off or opening of aggressive media. With its superior chemical resistance, bubble-tight sealing, and compact design, the D671F series is widely utilized in petroleum, chemical, pharmaceutical, and electronic industries where corrosion protection is paramount.Product Image of D671F Pneumatic Fluorine-Lined On-Off Butterfly Valve

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D671X Pneumatic Wafer Butterfly Valve

Model：
D671X-10/D671X-16/D671X-10Q/D671X-16Q/D671X-10C/D671X-16C/D671X-10P/D671X-16P
Specification：
DN50-DN1200
Pressure：
PN10~PN16
Material：
Cast iron, ductile iron, cast steel, stainless steel + rubber lining, fluorine lining

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

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D641X Pneumatic Flanged Butterfly Valve

Model：
D641X-10/D641X-16/D641X-10Q/D641X-16Q/D641X-10C/D641X-16C/D641X-10P/D641X-16P/D641F-10/D641F-16/D641F-10Q/D641F-16Q/D641F-10C/D641F-16C/D641F-10P/D641F-16P
Specification：
DN50-DN2000
Pressure：
PN10~PN16
Material：
Cast iron, ductile iron, stainless steel + rubber lining, fluorine lining

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

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ZMAW Pneumatic Regulating Butterfly Valve

Model：
ZMAW-16C/ZMAW-25C/ZMAW-40C/ZMAW-16P/ZMAW-25P/ZMAW-40P
Specification：
DN80-DN1000
Pressure：
PN1.6、PN2.5、PN4.0
Material：
Carbon steel, stainless steel

ZMAW pneumatic regulating butterfly valve is an industrial automation execution unit consisting of a multi-spring pneumatic diaphragm actuator and a high-performance regulating butterfly valve body. By receiving pneumatic signals from the control system (or standard 4-20mA DC signals converted via an electro-pneumatic positioner), the valve utilizes the thrust generated in the diaphragm chamber to drive the valve stem, causing the disc to rotate within a range of 0-90 degrees. This adjusts the fluid flow area in real-time to achieve continuous proportional regulation of process parameters such as flow rate, pressure, and temperature. Due to its streamlined flow path, low resistance coefficient, and compact structure, this series is particularly suitable for large-diameter, high-flow, and low-pressure-differential conditions with limited installation space, widely used in metallurgy, environmental protection, water treatment, and HVAC systems.Product Image of ZMAW Pneumatic Regulating Butterfly Valve

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D641H Pneumatic Flanged Hard-Sealing Butterfly Valve

Model：
D641H-0.5C/D641H-1C/D641H-2.5C/D641H-6C/D641H-0.5P/D641H-1P/D641H-2.5P/D641H-6P
Specification：
DN50-DN2000
Pressure：
PN0.5~PN6
Material：
Carbon steel, stainless steel

D641H pneumatic ventilation butterfly valve is a non-sealing type butterfly valve specially designed for flow regulation and shut-off of media such as air, flue gas, and dust-containing gases under low-pressure and large-diameter working conditions. The valve adopts a steel plate welded structure and is matched with a high-precision pneumatic actuator, enabling automated remote control in industrial piping networks. Its core design philosophy lies in being "lightweight, temperature-resistant, and low-resistance," and it is widely used in ventilation and dust removal systems, environmental treatment projects, and flue gas desulfurization and denitrification systems in metallurgy, chemical, power, building materials, and municipal engineering.Product Image of D641H Pneumatic Flanged Hard-Sealing Butterfly Valve

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

D643H Pneumatic Metal-Sealed Butterfly Valve

D673H Pneumatic Triple-Eccentric Control Butterfly Valve

ZDG High-Performance Shut-off Butterfly Valve

D671F Pneumatic Fluorine-Lined On-Off Butterfly Valve

D671X Pneumatic Wafer Butterfly Valve

D641X Pneumatic Flanged Butterfly Valve

ZMAW Pneumatic Regulating Butterfly Valve

D641H Pneumatic Flanged Hard-Sealing Butterfly Valve

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