Airlock Valve for Sale
Our airlock valve pays attention to detail, performs well and is made of high quality materials!
- Bidirectional flow design reduces maintenance frequency and leakage risk.
- Excellent sealing performance.
- Modular and customizable, supporting quick installation.
- Energy-saving and environmental advantages.
- Supports Industrial Internet of Things (IIoT) connectivity for real-time monitoring.
Best airlock valve manufacturer
Darko focuses on the development of airlock valves, with a compact structure design that reduces the failure rate by 30%. The annual production capacity is over 10000 airlock valves, certified by ISO 9001, suitable for normal dust control needs in the food and chemical industries. Additionally, it offers extreme condition solutions ranging from -252°C to 450°C. The 14-inch large-diameter rotary airlock valve supports operations at 200°C, and the customizable ports (100-500mm) ensure precise discharge control. If you have a request for personalization, please feel free to contact our sales team to discuss your ideas.
Rotary airlock valves
From small airlock valves to large airlock valves for mills, we have a wide range of capacities to choose from that can be customized to suit your capacity and requirements.
Used in conjunction with screw conveyors and chain conveyors for sealed discharge.
Compatible with square pipelines or hopper interfaces for easy direct installation.
Stainless steel can withstand acids, alkalis, high temperatures , and corrosive media.
The cast iron casing has high hardness, making it suitable for abrasive materials .
More impact-resistant, making it suitable for high-load or foreign object-laden conditions.
Suitable for high pressure differences (0.6 MPa) or flammable and explosive dust.
Explosion-proof design meets high-level standards such as ExdⅡCT4
Discharge highly abrasive powders from vertical mills and cyclone dust collectors.
Double flap valve
Driven by a pneumatic actuator, ensure that at least one layer of the valve plate is always in a closed position.
Equipped with an electric actuator (including reducer, crank, cam, and other components), supporting variable frequency speed control.
Double flap valve with double valve plateBy alternating the plate, a continuous unloading cycle is formed, enhancing the ability to resist material jamming.
Why do you need to choose an airlock valve?
The airlock valve, through its innovative structural design, has achieved the dual goals of safety protection and energy conservation and emission reduction. Therefore, this kind of airlock valve has become a key device for balancing airflow and material transportation in modern industry.
The good locking wind effect enhances heat transfer efficiency, indirectly reducing coal consumption.
The application of wear-resistant materials and anti-jamming design reduces abnormal wear and extends the lifespan of machinery.
The innovative technology reduces dust emission concentration to less than 10 mg/m³, meeting ultra-low emission standards.
The good sealing effect effectively isolates the short-circuiting of the chute airflow, maintains stable system pressure, and prevents dust explosions caused by turbulent airflow.
The sealing performance maintains system stability, reducing maintenance frequency and costs. Structural optimization ensures continuous operation.
By using standardized flange sizes and pre-welded structures, direct connections with various dust collector hoppers and silos are supported, reducing on-site cutting and adjustment processes.
Custom flange interface sizes can be supported according to customer drawings, making it adaptable to non-standard piping layouts and solving installation challenges in space-constrained scenarios.
Standardized procedures enable direct valve feedback reading via HMI for real-time PID adjustments, with some newer models offering Bluetooth for mobile app debugging.
Why would you choose Darko's airlock valves?
From product performance to service system, Darko has always insisted on providing stable, efficient and customized
airlock valve solutions for global customers.
Darko has more than 15 years of experience in the
levelopment and production of airlock valves with proven and reliable technology.
We have a modernized production base, the equipment factory price is more competitive, delivery is more controllable.
Provide customized grinding solutions according to customer’s material characteristics and capacity requirements.
Our airlock valve products consume more than 30% less energythan traditional valves, helping customers to reduceoperating costs.
The equipment is exported to 20+ countries, providing overseas installation and commissioning, training and after-sales service.
All products have passed ISO, CE and other international certifications, strict quality inspection, quality is trust worthy.
Intelligent control compatibility
The airlock valve generally supports 4-20mA and 0-10V analog signals, as well as Modbus communication protocol, allowing seamless integration with PLC/DCS systems for precise flow and pressure regulation. It also supports RS-485 ports or PLC signal triggering to initiate regeneration programs, enabling real-time interaction with online monitoring systems.
Airlocking and discharging simultaneously
The airlock valve achieves synchronous actions of locking air and unloading either mechanically or electrically. In the mechanical version, such as the weighted flap valve, dual valve plates alternate between opening and closing; the upper plate remains sealed while the lower plate unloads, creating a continuous locking of air. The electric version uses a star-shaped impeller that rotates, with the upper leaf isolating airflow while the lower leaf simultaneously unloads.
What equipment does the airlock valve apply to?
The airlock valve in a baghouse dust collector has two main jobs: it helps unload ash from the hopper and keeps the airflow separate. What’s more, it keeps dust emissions below 10 mg/Nm³.
In a vertical mill with a negative pressure system, the lock valve keeps the air locked in using a round pipe that seals itself or a weighted design. This helps minimize pressure fluctuations and vibrations that can happen due to air leaks inside the system.
The airlock valve uses parts like impellers, flaps, or conical plates to keep the air pressure balanced between the top and bottom of the storage bin. This helps stop outside air from interfering or causing dust leaks. What’s more, the airlock valvemakes sure materials are delivered evenly and accurately, keeping a steady connection with downstream equipment like conveyors and dust collectors.
Customized Design And Full-cycle service
Darko’s airlock valve provides a lot of customization options in three key areas: materials, structures, and smart control. You can choose from stainless steel, titanium alloy, or wear-resistant coatings for the valve body, which can handle temperatures from -196°C to 800°C and pressure ratings up to ANSI 600#. It can be designed with flaps, star-shaped rotors, or conical seals, and keeps air leakage below 0.5%.
Darko’s airlock valve offers a full lifecycle closed-loop service that covers everything from “customized design, installation and debugging, operation and maintenance, to recycling and remanufacturing.” We provide an extended warranty period of 24 months and create exclusive health records for the airlock valve. We also support remanufacturing of old valves, with an 80% reuse rate for core components.
Testimonials
We use Darko’s airlock valves in our kiln head and tail dust collectors. These valves use the system’s negative pressure self-sealing, which means we don’t need electricity, saving us over 500,000 yuan a year on power. The nano-composite curtain plates can handle temperatures up to 1250°C, and the wear-resistant channels last over 10 years. This completely fixes the oil and material leaks we used to have with traditional rotary feeders.
HUAXIN CementCement industryWe use Dakko’s impeller feeders in conjunction with the coal mills. The impeller rotates to unload material, powered by a geared motor, while maintaining enough residual material inside the valve body to create a dynamic seal. This setup helps reduce energy losses caused by air leakage in the grinding system.
Baotou Rare Earth Aluminum IndustryPower PIant
Rotary airlock valves, also known as rotary airlocks or rotary valves, are key components in handling dry bulk materials. These valves control the flow of materials between chambers. They also stop air from leaking, which helps ensure safe and efficient operation.
They make it easy to move dry, free-flowing bulk solids—like powders, granules, pellets, nuggets, dust, and crystals—from a storage bin, storage silo, hopper, cyclone, or receiver through a pneumatic conveying system to the next step in the manufacturing process.
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Related Product
Darko has been a leading provider of custom made dust collectors for the Cement, Food, Wood, Chemical and Mineral Industries.
Achieve precise control of powder material flow to ensure the stability and accuracy of material delivery.
Reduce packaging bag waste and manual intervention, resulting in low overall operational and maintenance costs.
How do you find the right airlock valve?
Darko is committed to helping you find the most suitable airlock valve.
We offer the following services:
- Needs Analysis: We communicate with you to gain a deep understanding of your application scenario, including material types, temperature ranges, and pressure requirements.
- Technical Consultation: Our team of experts will provide detailed technical specifications, helping you understand the characteristics of different airlock valves, such as materials, structural design, and air leakage rates.
- Customized Solutions: Based on your specific needs, we can offer customization services to ensure that the lock air valve fully meets your requirements.
- Case Sharing: We will share successful case studies from other customers to help you understand the effects and experiences of different choices.
- Trial and Feedback: Before purchasing, you can conduct small-scale tests to confirm the performance and applicability of the airlock valve.
- After-sales Support: We provide comprehensive after-sales services to ensure that your equipment operates efficiently at all times.