We design and manufacture inert gas circulating pneumatic conveying systems, also called closed-loop inert gas conveying equipment. These systems are developed for safe, airtight and explosion-proof transport of bulk powders. By using nitrogen, argon or another inert gas as the conveying medium, the system prevents oxidation, moisture absorption and combustible dust explosion during handling. It is widely used in high-purity and hazardous powder processing industries.

The closed-loop structure significantly reduces gas consumption. Powder enters the conveying pipeline through an airtight rotary feeder or screw feeder. A Roots blower generates pressure to keep the powder suspended and move it to the target silo or process equipment. After separation, the inert gas is filtered, purified and returned to the blower for reuse. This ensures a stable oxygen-free environment and prevents dust leakage.

This equipment is ideal for oxygen-sensitive and explosive materials, including lithium battery cathode and anode powders, aluminum powder, magnesium powder, zinc powder, pharmaceutical intermediates, pigments, carbon black and chemical powders. The inert gas atmosphere keeps these materials stable and safe during transportation.

As an experienced system manufacturer, we provide customized solutions based on material properties, conveying capacity, pipeline length and site layout. Every system includes an explosion-proof Roots blower, airtight rotary feeder, reverse-jet dust collector, cyclone separator, inert gas buffer tank, oxygen analyzer, pressure transmitter, safety valve and PLC control cabinet. We can also add a moisture analyzer and remote monitoring system.

The PLC control system monitors the oxygen concentration in the pipeline in real time. If the oxygen level exceeds the safe limit, an alarm is triggered, the feeding valve closes, and inert gas purging starts. Pressure relief valves, flame arresters, static grounding wires and anti-static filters provide multi-level protection. All electrical components are explosion-proof.

All contact parts can be made of stainless steel 304, 316L or special anti-wear materials. High-precision flanges and oil-resistant, aging-resistant rubber or PTFE gaskets ensure reliable sealing. The filter media are anti-static and available in different filtration accuracies. The system is designed for stable, low-energy and dust-free operation with minimal maintenance.

Applications include new energy materials, active metal powders, pharmaceuticals, food additives, dyes, catalysts, flame retardants and rubber additives. For fragile materials, the conveying velocity and pressure are carefully designed to reduce particle breakage. We also provide open-loop or closed-loop options, dense-phase or dilute-phase conveying, and positive or negative pressure layouts.

The quotation price of an inert gas circulating pneumatic conveying system depends on conveying capacity, distance, pipe diameter, material of construction, automation level and explosion-proof configuration. Stainless steel systems and certified explosion-proof components increase the initial cost but ensure higher safety and longer service life. We provide every customer with a clear factory price.

Our factory provides material testing, process design, equipment manufacturing, installation guidance and operator training. After-sales support includes spare parts supply and remote troubleshooting. We help customers choose the most suitable sealed explosion-proof conveying solution at a competitive factory-direct price.

To receive a customized proposal, please provide material name, bulk density, particle size, moisture content, conveying distance and required capacity. Our engineers will design the optimal inert gas circulation system and offer a detailed quotation. We are your reliable partner for safe and efficient pneumatic conveying.