Double Knife Diverter Valve

The Double Knife Diverter Valve is a high-precision reversing control device specifically designed for fluid, powder, and granular material conveying systems. Leveraging the company's years of experience in valve manufacturing and fluid control technology, it utilizes a "double-blade linkage valve core" as its core, employing a three-way layout with one inlet and two outlets or two inlets and one outlet. Through synchronous linkage switching of the two blades, it achieves precise control of media flow direction, combining advantages such as accurate reversing, tight sealing, anti-clogging and wear resistance, and compact structure. Manufactured in strict accordance with relevant standards such as GB/T 9092, API 598, and ISO 4401, it is suitable for various operating conditions from normal to medium and high pressures. It is widely used in industries such as construction machinery, mining equipment, chemical, metallurgy, shipbuilding, and automated production lines, completely solving industry pain points such as switching deviation, poor sealing, easy material jamming, and poor linkage of traditional reversing valves. It simplifies pipeline layout and improves system operational stability and controllability.

As a high-precision reversing hub for media conveying systems, this product is based on "dual-blade linkage for precise reversing," with three major functions working together to connect the conveying pipeline and the actuator, achieving efficient media control while ensuring stable operation and ease of use, and adapting to complex process requirements in multiple scenarios.

Dual-blade linkage for precise reversing : Utilizing an integrated dual-blade linkage valve core, precision-machined by CNC, the dual blades are driven synchronously and smoothly by pneumatic, manual, or electric actuators. The reversing angle is precisely controllable (0°~90°), with no offset or jamming. It can flexibly achieve flow direction switching of one inlet and two outlets or two inlets and one outlet. The dual-blade linkage sealing and synchronous positioning avoid media crossflow and reversing deviation caused by single-blade switching. It is suitable for working conditions with high requirements for reversing accuracy, such as precision hydraulic systems and precision batching and conveying systems.

Anti-clogging and anti-accumulation, suitable for multiple media : The dual blades adopt a thin and streamlined design, and the inner wall of the flow channel is precision polished (polishing accuracy can reach 400#), which is smooth and clean, without protrusions or dead corners. It can effectively avoid the accumulation and jamming of powder, granular materials or viscous fluids, and is suitable for granular materials with a particle size of 0.1~50mm and various fluid media. When the dual blades work together, they can scrape off the material slightly adhering to the inner wall of the flow channel, further preventing material accumulation and blockage, and completely eliminating the problem of material blockage and downtime. It is suitable for mining, chemical and other dusty and high viscosity media scenarios.

Double sealing for excellent leak prevention : It adopts a double-blade, double-fit sealing structure, with the blades tightly fitting the valve seat. The sealing components are made of high-pressure resistant, wear-resistant, and aging-resistant materials such as FKM (fluororubber), PTFE, and NBR (nitrile rubber), which can be flexibly selected according to the characteristics of the medium to achieve ANSI Class VI zero leakage. For high-pressure and high-wear conditions, a hard seal (Stellite alloy, tungsten carbide) structure can be configured, providing double sealing and double protection to effectively prevent media leakage and air ingress, avoiding media loss, equipment damage, and workshop dust pollution. It is suitable for long-term stable operation in medium and high-pressure scenarios.

1. Dual-blade linkage design ensures precise and error-free directional switching.

The core adopts a dual-blade integrated linkage valve core, which is made of high-strength alloy material and precision machined. The dual blades have uniform thickness and strong linkage synchronization. Combined with a precise limit mechanism, the reversing process is smooth, shock-free, and noiseless, with a reversing accuracy of ±0.5°. It effectively avoids the offset and crossflow problems that occur when reversing with a single blade. The reversing response speed is controllable (adjustable from 0.6 to 1.8 seconds), which is suitable for frequent reversing conditions and can also meet the requirements of high-precision and smooth reversing. It is suitable for scenarios with high reversing accuracy requirements, such as automated production lines, precision hydraulic systems, and precision batching systems.

2. Anti-clogging and wear-resistant, suitable for multiple media and various working conditions.

The valve body and double-blade valve core are precision cast from cast steel or stainless steel (304, 316L, CF8/CF8M optional). Some lightweight models use high-strength aluminum alloy, balancing lightweight and durability, and can be used in harsh environments such as marine salt spray, high humidity and high temperature, and high dust. The blade surface is hardened or hard alloy welded (HRC≥58), with excellent wear resistance, corrosion resistance and impact resistance, which can effectively resist the high-speed scouring of powder and granular materials and the erosion of corrosive fluids. The streamlined flow channel design eliminates dead corners for material residue, and is suitable for various media such as hydraulic oil, mineral oil, chemical fluids, powder, and granular materials, and can also handle high wear and strong corrosion conditions.

3. Compact structure and strong installation adaptability.

Featuring an integrated and compact design with a highly integrated dual-blade valve core, this valve reduces the size by more than 35% compared to traditional directional valves, occupying less installation space. It is particularly suitable for space-constrained scenarios such as ship engine rooms, construction machinery, and small automated production lines. The nominal diameter covers DN40~DN450, and the interface adopts GB/T 9113 and ANSI B16.5 standard flange connections, which can be seamlessly connected with various pneumatic conveying systems, hydraulic systems, conveying pipelines, and actuators. It supports multiple installation methods, including horizontal and vertical installations, without the need for complex modifications. It is highly adaptable and can flexibly adapt to different pipeline layout requirements.

4. Easy to operate and low maintenance cost

It supports manual, pneumatic, and electric drive modes. The manual drive features an ergonomic handle design, making operation effortless and flexible, allowing for quick manual intervention in emergencies. The pneumatic and electric drives enable remote control and automated linkage, adapting to industrial automated production lines and eliminating the need for on-site manual operation, significantly improving operational efficiency. The modular design allows for the individual disassembly and replacement of vulnerable components such as double blades and seals, eliminating the need to dismantle the entire valve, thus improving maintenance efficiency by more than 50%. The standardized configuration of vulnerable parts facilitates procurement, ensures wear resistance and durability, reduces replacement frequency, and results in low vibration and a low failure rate during equipment operation, enabling long-term continuous operation.

5. High pressure withstand, stable and reliable operation.

After high-pressure strength and fatigue testing, the working pressure can cover atmospheric pressure up to 16MPa, and it can be adapted to medium and high pressure conditions of Class 600 (about 10MPa). The temperature range is -30℃ to 400℃. It can operate stably for a long time under complex working conditions with high temperature, high pressure and strong vibration without deformation or leakage. The double blade adopts a rigid linkage connection structure and is equipped with a precise limit device to ensure firm positioning and avoid reversal deviation caused by medium pressure fluctuations. At the same time, it ensures system pressure stability and avoids air pressure and hydraulic pressure fluctuations caused by reversal.

6. Highly compatible, adaptable to the needs of multiple industries.

It can be seamlessly integrated with our pneumatic conveying systems, hydraulic systems, metering equipment, and actuators, and is suitable for the process requirements of various industries such as engineering machinery, mining, chemical, shipbuilding, and automated production lines. It supports non-standard customization and can adjust the blade structure, sealing material, nominal diameter, and reversing speed according to the requirements of media characteristics, reversing frequency, installation space, and drive method to meet the personalized working conditions of customers. At the same time, it complies with international hydraulic standards and is easy to integrate with multi-brand systems.

Shanghai Hanye Engineering Technology Co., Ltd. specializes in fluid and material control, focusing on the pain points of precise media reversal. With "precision and efficiency, anti-clogging and wear-resistant, and reliable sealing" as its core principles, it provides customers with highly reliable and adaptable Double Knife Diverter Valve and related solutions. For detailed parameters, operating condition adaptation solutions, or on-site case studies, please feel free to contact us!