Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

D343H Triple Eccentric Hard Seal Butterfly Valve
D341W ventilation butterfly valve
D342H Double Eccentric Butterfly Valve
D343H Flanged Hard Seal Butterfly Valve
D343Y Flanged Hard Seal Butterfly Valve
D643Y Hard Seal Pneumatic Butterfly Valve
D363H Three Eccentric Hard Seal Butt Welding Butterfly Valve
D373H Wafer Type Hard Seal Butterfly Valve
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Hard Seal Butterfly Valve

Hard sealed butterfly valve is a high-performance industrial valve, characterized by the use of metal or high hardness wear-resistant materials for the sealing surfaces of the valve seat and butterfly plate. Through precision machining of sealing pairs and high closing torque, a rigid metal to metal (or hard material) seal is formed, suitable for harsh working conditions such as high temperature, high pressure, wear and corrosive media. Hard sealed butterfly valves usually adopt multi-level sealing or eccentric structure design (such as double eccentric, triple eccentric), which effectively reduces friction during the opening and closing process of the butterfly plate, achieving tight cutting and long service life. The main structure includes a valve body, a metal valve seat, a hard butterfly plate, a valve stem, and a driving device. The flange hard seal butterfly valve, clamp hard seal butterfly valve, multi-level hard seal butterfly valve, double eccentric hard seal butterfly valve, triple eccentric hard seal butterfly valve, electric hard seal butterfly valve, pneumatic hard seal butterfly valve and other hard seal butterfly valves produced by Kaiweixi Valve have significant advantages of wide temperature resistance, high pressure resistance, and strong wear resistance. They can be widely used in thermal power, petrochemical, metallurgical, steam systems and hazardous medium pipelines.

D343H Triple Eccentric Hard Seal Butterfly Valve

Model：
D343H-10C/D343H-16C/D343H-25C/D343H-10P/D343H-16P/D343H-25P/D343H-10R/D343H-16R/D343H-25R
Specification：
DN50~2000mm
Pressure：
PN10~PN25
Material：
Cast steel, stainless steel, duplex stainless steel

OverviewThe D343H hard seal butterfly valve is a flanged connection butterfly valve that utilizes a multi-layer metal hard sealing structure and achieves tight shut-off through the triple eccentric principle. This valve features a triple eccentric geometry comprising axial eccentricity, radial offset, and conical angle eccentricity. This design ensures that the disc completely disengages from the metal seal ring during the opening and closing cycles, creating a wedge-type compressive seal only at the final closed position. The valve stem is operated via a worm gear mechanism, offering easy operation and self-locking functionality. The sealing pair consists of a laminated structure of stainless steel sheets and flexible graphite, or a hardfaced alloy on the disc sealing surface. This forms a high-hardness, wear-resistant hard sealing system against the metal seat, making the valve suitable for demanding conditions involving high temperatures, high pressures, and media containing solid particles.D343H Triple Eccentric Hard Seal Butterfly Valve Product Image

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D341W ventilation butterfly valve

Model：
D341W-6C/D341W-10C/D341W-6P/D341W-10P
Specification：
DN50-DN2000
Pressure：
PN6-PN10
Material：
Carbon steel, stainless steel

OverviewD341W ventilation butterfly valve is a valve that opens, closes, and regulates gas channels by rotating a disc-shaped butterfly plate around its fixed axis (valve stem). The axis of its valve stem is usually designed with a center or eccentricity perpendicular to the plate surface, and the butterfly plate structure is determined according to the working conditions. The valve adopts a flange connection, which means that the valve body comes with a flange and is directly connected to the pipeline flange through bolts. Butterfly plate sealing usually adopts metal sealing or non sealed design, and the valve seat can be a body welding or embedded structure, suitable for controlling the flow of low-pressure gas media. This valve is driven by a manual, electric, or pneumatic device to rotate the valve stem, typically 90 degrees, to control the flow of air in the ventilation network.D341W ventilation butterfly valve product diagram

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D342H Double Eccentric Butterfly Valve

Model：
D342H-10C/D342H-16C/D342H-10P/D342H-16P/D342Y-10R/D342Y-16R
Specification：
DN100-DN3000
Pressure：
PN10~PN16
Material：
Cast steel, stainless steel, duplex stainless steel

OverviewThe D342H double eccentric butterfly valve is a valve that opens, closes, and regulates the medium flow passage through the rotation of a disc-shaped butterfly plate around its fixed shaft (stem). Its stem axis features a double eccentric design, meaning the stem axis is offset from both the center of the butterfly plate and the center of the sealing surface, while being perpendicular to the centerline of the valve body passage. This design allows the butterfly plate to quickly disengage from the valve seat sealing surface upon opening. The valve adopts a flanged connection, where the valve body comes with integrated flanges that are directly bolted to the pipeline flanges. The sealing pair between the valve seat and the butterfly plate typically employs a metal-to-metal configuration. Specifically, the valve seat consists of a metal sealing ring, and the sealing surface of the butterfly plate is overlaid with hard alloy. The valve seat can be either an overlay welded onto the body or an inserted structure. This design makes the valve suitable for media conditions involving high temperatures, high pressure differentials, and strong abrasiveness. The valve is operated by rotating the stem, typically by 90 degrees, using manual, electric, or pneumatic actuators, achieving tight shut-off and flow control of the medium within the piping system.D342H Double Eccentric Butterfly Valve Product Image

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D343H Flanged Hard Seal Butterfly Valve

Model：
D343H-10/D343H-16/D343H-16Q/D343H-25Q/D343H-10P/D343H-16P/D343H-25P/D343H-10R/D343H-16R/D343H-25R
Specification：
DN50-DN1200
Pressure：
PN6~PN40
Material：
Cast Iron, Cast Steel, Stainless Steel, Cr-Mo Steel, Alloy Steel

OverviewThe D343H Stainless Steel Triple Eccentric Hard Seal Butterfly Valve is a valve that achieves opening, closing, and flow regulation through the rotation of a high-strength stainless steel disc around its fixed axis (valve stem). Its design features a "triple eccentric" structure, meaning the valve stem axis is offset from the center of the disc sealing surface, the centerline of the pipeline, and the center of the valve body. This allows the disc to instantly disengage from or press against the valve seat during opening and closing, completely eliminating friction and binding between the sealing surfaces. The valve adopts a flanged connection for convenient installation and disassembly. Both the disc and valve seat sealing surfaces are made of metallic materials (stainless steel against stainless steel) and are precision-lapped. Relying on the cam effect generated by the triple eccentric structure, the valve achieves a reliable sealing action that tightens as the valve closes. This valve can be operated manually, electrically, or pneumatically, rotating the stem 90° to achieve tight shut-off and precise control in pipelines handling high-temperature, high-pressure, and corrosive media.D343H Stainless Steel Triple Eccentric Hard Seal Butterfly Valve

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D343Y Flanged Hard Seal Butterfly Valve

Model：
D343Y-10C/D343Y-16C/D343Y-25C/D343Y-10P/D343Y-16P/D343Y-25P/D343Y-10R/D343Y-16R/D343Y-25R
Specification：
DN50-DN1200
Pressure：
PN10~PN25
Material：
Cast steel, stainless steel, duplex stainless steel

OverviewThe D343Y Stainless Steel Triple Eccentric Hard Seal Butterfly Valve is a valve that achieves opening, closing, and flow regulation through the rotation of a high-strength stainless steel disc around its fixed axis (valve stem). Its design features a "triple eccentric" structure, meaning the valve stem axis is offset from the center of the disc sealing surface, the centerline of the pipeline, and the center of the valve body. This allows the disc to instantly disengage from or press against the valve seat during opening and closing, completely eliminating friction and binding between the sealing surfaces. The valve adopts a flanged connection for convenient installation and disassembly. Both the disc and valve seat sealing surfaces are made of metallic materials (stainless steel against stainless steel) and are precision-lapped. Relying on the cam effect generated by the triple eccentric structure, the valve achieves a reliable sealing action that tightens as the valve closes. This valve can be operated manually, electrically, or pneumatically, rotating the stem 90° to achieve tight shut-off and precise control in pipelines handling high-temperature, high-pressure, and corrosive media.D343Y Stainless Steel Triple Eccentric Hard Seal Butterfly Valve product image

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D643Y Hard Seal Pneumatic Butterfly Valve

Model：
D643Y-10C/D643Y-16C/D643Y-25C/D643Y-10P/D643Y-16P/D643Y-25P/D643Y-10R/D643Y-16R/D643Y-25R
Specification：
DN50-DN1200
Pressure：
PN10~PN25
Material：
Cast steel, stainless steel, duplex stainless steel

OverviewThe D643Y Pneumatic Flanged Hard Seal Butterfly Valve is a valve in which the disc, fabricated from high-strength alloy steel plates through welding, rotates 90° around its circular shaft to achieve fluid opening, closing, and flow regulation. Its shaft axis is located at the centerline of the pipeline, classifying it as a concentric (centerline) type structure, with the sealing pair consisting of metal-to-metal materials. The valve features a flanged connection, meaning both ends of the valve body are equipped with connecting flanges that match the pipeline flange standards, allowing direct fastening to the pipeline flanges using bolts and nuts. The sealing structure employs multi-layer metal hard seal technology, utilizing a seal ring composed of multiple layers of stainless steel sheets compounded with materials like graphite to achieve reliable sealing under the action of elastic force and medium pressure, offering characteristics such as high-temperature resistance, wear resistance, and corrosion resistance. This valve is operated by a pneumatic actuator that rotates the shaft 90°, enabling rapid shut-off and precise regulation of the pipeline fluid. Accessories such as solenoid valves and limit switches can be optionally configured for remote automated control.Product Image of D643Y Hard-Sealing Pneumatic Butterfly Valve

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D363H Three Eccentric Hard Seal Butt Welding Butterfly Valve

Model：
D363H-10C/D363H-16C/D363H-25C/D363H-40C/D363H-10P/D363H-16P/D363H-25P/D363H-40P/D363H-10R/D363H-16R/D363H-25R/D363H-40R
Specification：
DN100-DN1400
Pressure：
PN10~PN40
Material：
Cast steel, stainless steel, duplex stainless steel

OverviewThe D363H triple eccentric hard seal butt welded butterfly valve is a high-performance butterfly valve designed based on a triple eccentric structure, which achieves valve opening and closing and flow regulation by rotating the butterfly plate 90 ° around its axis of rotation. Its core features lie in three key eccentric designs: eccentricity between the valve stem axis and the butterfly plate sealing surface, eccentricity between the valve stem axis and the pipeline channel axis, and offset between the conical axis of the butterfly plate sealing surface and the pipeline channel axis. This structure enables the butterfly plate to rotate completely out of contact with the metal hard sealing ring (such as stainless steel, hard alloy) during the opening and closing process. When closed, the bi-directional metal seal is achieved through the wedge-shaped compression effect between the butterfly plate and the valve seat. The valve body adopts butt welding connection method, directly welded with the pipeline, suitable for high temperature, high pressure and corrosive medium working conditions. The driving mode can be adapted to manual, electric, pneumatic or hydraulic devices, and is suitable for reliable cut-off and regulation control of harsh working conditions in industries such as petroleum, chemical, and power.D363H Three Eccentric Hard Seal Butt Welding Butterfly Valve Product Drawing

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D373H Wafer Type Hard Seal Butterfly Valve

Model：
D373H-10C/D373H-16C/D373H-25C/D373H-40C/D373H-10P/D373H-16P/D373H-25P/D373H-40P/D373H-10R/D373H-16R/D373H-25R/D373H-40R
Specification：
DN50-DN2000
Pressure：
PN10~PN40
Material：
Cast steel, stainless steel, duplex stainless steel

OverviewThe D373H wafer type hard seal butterfly valve is a valve that achieves opening, closing, and fluid flow regulation through the rotation of a high-strength metal disc around its fixed shaft (valve stem). The stem axis is positioned at the intersection of the disc sealing surface center and the pipeline channel centerline, with the disc being symmetrical on both sides. The valve features a wafer-type connection, meaning the valve body itself is flangeless. It is clamped directly between two pipeline flanges using stud bolts, enabling a compact installation. Both the disc and the valve seat sealing surfaces are designed with a matching pair of metal materials (Stainless Steel/Alloy Steel). The sealing surfaces are overlaid with hard alloy and precision ground, relying on the compression force generated by the disc rotation to achieve a hard seal. By rotating the stem 90° via a manual, electric, or pneumatic actuator, the valve enables rapid shut-off and flow control for pipelines carrying high-temperature, high-pressure, and corrosive media.D373H Wafer Type Hard Seal Butterfly Valve Product Drawing

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

D343H Triple Eccentric Hard Seal Butterfly Valve

D341W ventilation butterfly valve

D342H Double Eccentric Butterfly Valve

D343H Flanged Hard Seal Butterfly Valve

D343Y Flanged Hard Seal Butterfly Valve

D643Y Hard Seal Pneumatic Butterfly Valve

D363H Three Eccentric Hard Seal Butt Welding Butterfly Valve

D373H Wafer Type Hard Seal Butterfly Valve

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