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Flap Type Pneumatic Conveying Diverter Valves

Flap-type pneumatic conveying diverter valves are widely used in regulating the flow of bulk solids within pneumatic conveying systems. These valves are specifically engineered to redirect materials such as powders, pellets, flakes, or granules from a single feed line to multiple receiving points, under pressure or vacuum conveying conditions. Their robust construction, featuring cast iron or cast aluminum housings, ensures durability and reliability in demanding industrial environments.

The design of flap-type diverter valves minimizes disruption to airflow and material movement by maintaining a small angular offset between the inlet and outlet ports. Inside the valve, a specially designed swivel flap controls the bulk flow direction. The swivel flap is constructed with a flexible polyurethane rubber sheet firmly positioned between two metal plates, providing an effective seal while resisting wear from abrasive bulk materials. This construction helps to maintain consistent sealing performance and extends the operational life of the valve.
Pressure efficiency is a key consideration in these valves, with the internal flow path engineered to avoid significant changes in cross-sectional area. This reduces pressure drops and helps maintain the energy efficiency of the conveying system. Additionally, the valve’s actuation mechanism allows it to operate seamlessly during active conveying, enabling dynamic flow control without interrupting material transport. This capability makes flap-type diverter valves ideal for applications requiring continuous operation and precise material routing.

Design Features and Benefits of Pneumatic Conveying Diverter Valves

• Heavy-Duty Construction:

The valve is built to withstand challenging industrial conditions, ensuring durable and extended performance. This robust design minimizes downtime and maintenance costs over its service life.

• Low Pressure Drop:

Smooth internal geometry with no accumulation points allows materials and air to flow freely through the valve. This design reduces pressure loss, improving overall system efficiency.

• Actuation During Material Conveyance:

The flat type diverter valve can be operated while bulk material is actively flowing, allowing for efficient process control. This capability eliminates the need to stop the system for valve operation, enhancing productivity.

• Flange Options:

Valves come equipped with standard DIN or ANSI flanges for easy integration into a wide range of piping systems. This flexibility simplifies installation and ensures compatibility with existing equipment.

• Replaceable Polyurethane and Silicone Seals:

Built-in seals prevent product leakage and contamination, maintaining process cleanliness. The seals are replaceable, facilitating maintenance and extending the operational life of the valve.

• Various Construction Materials:

Depending on application needs, valves are available in cast steel, cast aluminum, or welded steel designs. This variety allows selection based on factors like durability, weight, and environmental conditions.

• Heavy-Duty Swivel Blade with Flexible Seal:

The swivel blade features a flexible polyurethane seal to provide effective sealing and withstand wear. This design ensures reliable bulk material flow and extends the durability of the diverter valve.

• Stainless Steel Models for Food and Sanitary Use:

Special stainless steel versions are designed to meet food-grade and sanitary standards. These models prevent contamination and are suitable for hygienic environments.
• Hardox Steel Models for Abrasive Materials:

For handling abrasive bulk solids, diverter valves made from Hardox steel offer enhanced wear resistance. This material choice improves valve lifespan in challenging conditions.

• High-Temperature Gravity Discharge Models:

Certain valve models can operate at temperatures up to 200°C, making them suitable for high-temperature processesThis increases their operational versatility across a broader range of applications.

• Multiple Actuation Options:

Valves can be operated using pneumatic actuators, pneumatic pistons, electric drives, or manual handles. This versatility allows integration into various control systems and operational preferences.

• Position Monitoring Features:

Built-in limit switches and position indicators enable easy verification of valve position. This helps ensure accurate control and streamlines fault detection

• Optional Side Inspection Door:

An inspection door is available to provide easy access for maintenance and cleaning. This design helps reduce downtime and simplifies routine checks.

• Customizable Outlet Configurations:

2-way and 3-way outlet models can be custom-designed to fit specific system requirements. This flexibility allows for custom-made bulk material diverting solutions.

• ATEX Certification:

ATEX-certified versions of the diverter valves are available for use in potentially explosive environments. This certification guarantees safe operation under hazardous conditions.

Configurations of Flap Type Pneumatic Conveying Diverter Valves

• Two 30° Symmetric Legs:

This configuration features two discharge legs set at equal 30° angles from the inlet. It enables balanced and uniform bulk material transfer to both outlets, supporting smooth and efficient material flow.

• One Straight Leg, One 30° Offset Leg:

Combining a direct path with an angled discharge, this configuration allows for controlled material transfer based on process design constraints. It's ideal for systems that require flexible integration into tight or uneven plant layouts.

• One Straight Leg, Two 30° Offset Legs:

This configuration has three outlet paths, one straight and two angled, and enables bulk solid transfer to multiple outlets. It provides enhanced flexibility for distributing bulk materials to different points in a processing or storage system.

• Custom-Designed Outlets with Any Angle:

Discharge legs can be manufactured at various angles to meet specific application needs. This custom-made design ensures optimal system performance and seamless integration with existing equipment and configurations.

Bulk Materials Handled by Gravity Diverter Valve

Cement
  
Starch
   
Minerals
  
Coffee Powder
Spices
  
Limestone
  
Copper Oxide
Salt
  
Sugar
  
Sand
  
Calcium Carbonate
Alumina
  

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These valves are typically actuated by pneumatic actuators and are used to automatically open and close the product flow to discharge material to downstream equipment.
Installed below silos or hoppers, these valves are used for maintenance operations of equipment such as rotary valves, screw feeders, etc., that are positioned below the butterfly valve.
These valves are typically actuated by pneumatic actuators and are used to automatically open and close the product flow to discharge material to downstream equipment.
In this design, the butterfly valve is sandwiched between two flanges. Rubber sealing at both faces of the valve provides a tight seal between the flanges and the wafer butterfly valve.
One side of the valve has a bolted flange connection, while the other side features a built-in short pipe designed for fixing a flexible sleeve.
These valves have bolted flange connections on both sides, making them suitable for installation on silos, hoppers, screw feeders, and similar applications.
Bulk tanker trucks or open trucks can be filled with powdered materials delivered within FIBC bags. These systems generally consist of bulk bag discharging station, mechanical or pneumatic conveyor and loading bellow. Big bag discharge station transfers the bulk solid from big bag to conveying system. Conveying system transfers it to truck loading area. And loading bellow is used to fill tanker truck without any dust emission. Since truck loading operations are done within limited time, high capacity big bag discharge systems and bulk material conveying systems are used. For short distances, screw conveyors are preferred to transfer material from big bag discharge station to truck loading chute. For long conveying distances, pneumatic conveying systems provide better service. There may exist a storage hopper or silo above bulk truck loading bellow to compensate material flow between inlet and outlet. Bulk bag discharge and truck filling systems have automatic control system that monitors product level in truck and operates all equipment accordingly. Optional weighing system can be added to measure the amount of material that is filled to truck.
Big bag discharge systems can deliver dry bulk solids in powder and granular form to weighing and batching systems. The loading hopper of the weighing system should remain full during dosing and batching. Big bag discharge systems can monitor the product level in the loading hopper and maintain a constant level automatically. Depending on the dosing speed and conveying distance, mechanical conveying systems or pneumatic loading systems may be used. Dust collectors can be employed to prevent dust emissions during hopper loading, especially for materials with high dust content.
Dry bulk packaging systems are used to fill powdered or granular materials into bags, drums, jars, sacks, etc. Bulk materials delivered in big bags must be transferred to packaging machines without interruption. The loading hopper of the packaging system should remain full during the filling and packaging process. Big bag discharge systems can monitor the product level in the loading hopper and maintain a constant level automatically. Depending on the packaging speed, mechanical conveying systems or pneumatic loading systems can be selected. Dust collectors can be used to prevent dust emissions during hopper loading, especially for materials with high dust content.
Mixer automation systems are used to mix dry bulk solids according to specific recipes. Raw materials delivered in FIBC bags can be transferred to mixing units through a combination of conveying equipment and bulk bag discharge systems. Depending on the type of application, pneumatic conveying or mechanical feeding systems can be used to fill mixers. Big bag discharge stations can be manufactured with built-in dosing systems. The amount of raw material to be loaded into the mixer is automatically controlled with the help of a weighing and dosing system. Dust collectors can be used to prevent dust emissions during the mixer filling process.
Bulk material stored in big bags can be automatically filled into small bags. Big bag discharge systems come with optional built-in bag filling units. For low filling capacities, these units are installed below the big bag discharge hopper, providing a practical and cost-effective solution. Both big bag discharging and bag filling operations can be handled by a single, compact system. For higher bag filling needs, bag filling machines are installed near the bulk bag discharge stations. Pneumatic conveying systems or mechanical conveyors can be used to transfer bulk material from the FIBC bag discharge station to the bag or sack filling system.
Mechanical conveyors can be used for silo loading from big bag discharge stations. Screw feeders, bucket elevators, rotary valves, or chain conveyors are connected to big bag discharge stations to fill silos. The selection of conveying equipment directly depends on the conveying distance, height, transferred material, and capacity. Bucket elevators are preferred for high silos, while screw feeders are preferred for shorter silos and short distances. The big bag discharge system can be installed on top of the silo for faster filling. In this case, rotary valves or butterfly valves are better choices as they provide simple flow control. Dust collection systems may be required depending on the dust content of the bulk solid. During silo loading, air content in the silo escapes to the atmosphere and carries some dust along with it. Vacuum fans and jet filters in dust collectors prevent dust emissions into the environment. The collected dust is sent back to the silo, thus preventing product loss.
Pneumatic conveying systems installed after bulk bag discharge units transfer bulk material through conveying pipelines to fill silos. This configuration is useful in applications where high transfer rates and long conveying distances are needed. In production lines where raw materials are stored in warehouses far from storage silos, bulk bag discharge stations can be installed close to the warehouses, and pneumatic conveying systems are used to fill silos from long distances. This design reduces the need for forklifts and cranes for bulk material transfer on the production site and increases overall efficiency.

Pneumatic conveying systems used for silo loading utilize blower pumps or compressors. Motor power, pipeline diameter, and equipment selection depend on the type of bulk material, transfer distance, silo height, and transfer capacity. Level sensors, jet filters, and other equipment are installed on storage silos to ensure the proper operation of the silo filling system.
Pneumatic conveying systems installed after bag dump units transfer bulk material through pipelines to fill silos. This configuration is ideal for applications requiring high transfer rates and long conveying distances. In production lines where raw materials are stored in warehouses far from storage silos, bag dump stations can be installed close to warehouses, allowing pneumatic conveying systems to transport materials over long distances. This design reduces the excessive use of forklifts and cranes for bulk material transfer within the production site, improving overall efficiency.

Pneumatic transfer systems used for silo loading utilize blower pumps or compressors. Motor power, pipeline diameter, and equipment selection depend on factors such as the type of bulk material, transfer distance, silo height, and transfer capacity. Level sensors, jet filters, and other equipment are installed on storage silos to ensure the proper operation of the silo filling system.
Mechanical conveyors can be used for silo loading from bag dump stations. In this configuration, screw feeders, bucket elevators, rotary valves, or chain conveyors are connected to bag dump stations to fill silos. The selection of conveying equipment depends on factors such as conveying distance, height, material properties, and capacity. Bucket elevators are preferred for high silos, while screw feeders are ideal for shorter silos and short distances. Bag dump systems can be installed on top of the silo for faster filling. In such cases, rotary valves or butterfly valves are better choices as they provide simple flow control.

Dust collection systems may be required depending on the dust content of the bulk solid. During silo loading, air inside the silo escapes to the atmosphere, carrying dust particles with it. Dust collectors equipped with a vacuum fan and jet filter capture airborne dust. The collected dust is returned to the silo, preventing product loss and ensuring a cleaner environment.
The inlet skirt is an optional feature designed to extend the lifespan of the flexible connector sleeve. Its upper portion is attached to the outlet port of the upstream equipment and extends down into the bin activator’s inlet port. The primary function of the inlet skirt is to serve as a protective shield, safeguarding the flexible connector seal from wear and damage.
A vibratory motor is externally mounted to the bin activator. When powered, the motor generates vibrations that facilitate a steady flow of dry bulk materials within the system. Depending on the application requirements, one or two vibratory motors can be installed externally.
To accommodate a bin activator, the cone of a silo must be shorter than usual, resulting in a wider outlet. A flange supplied with the bin activator is separately welded to the silo’s outlet, slightly above the opening, at the production site. Once installed, the vibrating bin discharger is securely bolted to the flange, ensuring a stable and reliable connection.
Special spring suspension links and an engineered polymer seal work together to create a flexible connection between a vibrating bin discharger and the equipment positioned above it.

The proper design and installation of the polyurethane seal prevent it from slipping off and ensure a secure seal, eliminating the risk of dry bulk material leakage. Additionally, the seal offers high stress resistance and long-term durability, withstanding stresses caused by motor vibrations, pressure conditions, and other operational factors.

Externally installed spring suspensions provide full resilience to the vibrations of the cone head. They ensure that the generated vibrations affect only the cone itself rather than the upstream equipment structure.
An internally tapered, conical-shaped baffle plate is positioned at the center of the bin activator’s diameter. The baffle is rigidly attached to the equipment body using structural steel components. It facilitates bulk material flow from upstream equipment by directly inducing vibrations into the material.

A secondary deflector plate reduces the weight of the bulk material in the lower portion of the bin activator by acting as a wedge beneath the material, directing it around the areas adjacent to the cone’s surface.

Polimak baffle plates are available in various configurations, including convex and cone plates, and in different angles (15°, 30°, 45°, or even 60°) depending on the flow characteristics of the handled bulk material and the specific application requirements.