Delta Ducon Extreme Duty Rotary Valves: Unyielding Performance for Abrasive Applications

In demanding industrial environments where the handling of abrasive, high-temperature, or otherwise challenging bulk materials is commonplace, the selection of robust and reliable equipment is paramount. Delta Ducon, a leading manufacturer with over a century of experience in material handling solutions, offers a specialized line of rotary valves engineered to excel in these severe duty applications: the PERMA/flo Extreme Duty Rotary Valves.

These valves, available in "XT" and "XL" series, have earned a reputation for their long service life, rugged construction, ease of maintenance, and overall high quality. Since their inception, the "XL" series has maintained its fundamental design, while the "XT" series, introduced in 2003 for 6" through 12" models, features an enhanced throat size. This improvement, achieved by increasing the rotor pockets from nine to ten, provides a significantly larger inlet, minimizing potential bridging of materials and improving pocket fill efficiency. Sizes 14" through 24" retain the traditional "XL" design.

Key Features and Benefits:

* Exceptional Material of Construction: Both the rotor and the seal/wear shoe are manufactured from a unique chrome, nickel-iron alloy known as P-33. This solid alloy casting boasts a hardness exceeding 550 Brinell, ensuring exceptional resistance to abrasion and wear, unlike surface-hardened alternatives that can lose their protective layer over time.

* Field Adjustable Design: A significant advantage of the PERMA/flo Extreme series is the ability to quickly adjust the clearance between the rotor and the wear shoe without removing the valve from service. This feature allows for proactive maintenance and optimization of performance, extending the valve's lifespan.

* Outboard Mounted Bearings: The flanged, regreasable bearings are mounted externally, isolating them from the conveyed material and high temperatures, contributing to their longevity and reliable operation. Sealed graphite bearings are also available for high-temperature applications.

* Multiple Packing Options: To cater to various application requirements and ensure effective sealing against differential pressures, Delta Ducon offers three packing options: standard lantern ring braided packing, cartridge seals, and Air Mizer seals.

* Replaceable Wear Parts: Recognizing that even the most durable components will eventually experience wear, the rotor and wear shoe can be replaced in the field without removing the entire valve from the system. This significantly reduces downtime and maintenance costs.

* High-Temperature Capabilities: Standard models are rated for continuous operation up to 500°F (260°C), with high-temperature configurations capable of handling 800°F (427°C) continuously and spikes up to 1000°F (538°C).

* Shaft Air Purge Kits: For applications involving pressure differentials, optional shaft air purge kits can be implemented to enhance sealing effectiveness.

* Wide Range of Sizes and Capacities: The PERMA/flo Extreme series is available in various "A" sizes, ranging from 6" to 24", with capacities from 0.2 to 6 cubic feet per revolution at 100% efficiency, accommodating diverse flow rate requirements.

Applications:

Delta Ducon's Extreme Duty Rotary Valves are specifically designed for handling abrasive, hot, and difficult-to-manage materials across a wide range of industries, including:

* Mining and Minerals Processing: Handling abrasive ores, concentrates, and tailings.

* Cement Production: Metering and conveying cement, clinker, and raw materials.

* Power Generation: Handling coal, ash (including fly ash and bottom ash), and other combustion byproducts.

* Pulp and Paper: Conveying wood chips, bark, and various chemicals.

* Steel and Metals: Handling abrasive dusts and process materials.

* Building and Construction Materials: Metering and conveying sand, gravel, and other aggregates.

Complementary Products and Services:

Delta Ducon offers a comprehensive suite of material handling solutions that complement their Extreme Duty Rotary Valves, including:

* Other Rotary Valve Types: Including Heavy Duty (HD) and Super Heavy Duty (SHD) series for moderately abrasive materials.

* Pneumatic Conveying Systems: Designing and supplying dilute phase, semi-dense phase, and dense phase conveying systems.

* Material Storage Silos and Unloading Equipment: Providing complete solutions for material storage and retrieval.

* Ash Handling Systems: Offering a wide range of equipment for ash removal, storage, and transport.

* PERMA/flo Abrasion Resistant Pipe & Elbows: Engineered for durability in abrasive material conveying.

* KG Diverter Valves: For directing material flow in pneumatic conveying systems.

* Feeder Rebuild Program: Restoring PERMA/flo Extreme series valves to like-new condition, extending their lifespan and reducing downtime.

In conclusion, Delta Ducon's PERMA/flo Extreme Duty Rotary Valves stand as a testament to robust engineering and a deep understanding of the challenges associated with handling demanding bulk materials. Their unique design features, exceptional materials of construction, and ease of maintenance make them a preferred choice for industries seeking reliable and long-lasting performance in the most arduous applications.