RAMFAN EB7325-WT Wing Tank Vent Cart: IECEx-Certified MRO Ventilation for Aircraft Fuel Tank Safety

Aircraft fuel tanks present one of the most unforgiving confined-space hazards in industrial maintenance. Residual fuel vapors, aerosol contaminants, and toxic fumes accumulate inside wing tanks before maintenance crews even touch a tool, and a single ignition source inside that space changes everything. Ground crews need ventilation that deploys immediately, handles dual-wing configurations in a single pass, and carries genuine hazardous-location certification, not a disclaimer buried in fine print. The RAMFAN EB7325-WT Wing Tank Vent Cart is engineered specifically for that scenario, arriving factory-mounted, palletized, and ready to connect.

What is the RAMFAN EB7325-WT Wing Tank Vent Cart and what does it do?

The RAMFAN EB7325-WT is a complete, mobile ventilation system purpose-built for Maintenance, Repair, and Overhaul (MRO) operations on aircraft wing fuel tanks. It combines an explosion-proof fan, conductive ducting, a wye splitter, inspection lighting, and a centralized power distribution box on a single cart frame, allowing ground crews to establish compliant confined-space ventilation with one AC connection and minimal setup time.

The cart weighs 690 lbs (313 kg) and measures 48″ x 32″ x 74″ (122 x 81 x 187 cm). It accepts a single 115/230 VAC, 50/60 Hz supply and distributes power to all onboard equipment through a dedicated AC power distribution box rated at 16 amps across both voltage configurations. This single-source power architecture eliminates the extension cord sprawl that creates tripping hazards on crowded hangar floors.

What IECEx and ATEX certifications does the EB7325-WT carry, and why do they matter for fuel tank work?

The EB7325-WT is engineered with IECEx-certified components, and the core ventilator, the RAMFAN EFi75xx, carries both ATEX and IECEx whole-unit certification for use in hazardous locations and explosive atmospheres. These are not self-declared ratings; IECEx and ATEX are internationally recognized third-party certification schemes covering equipment used where flammable gases, vapors, or dust may be present, exactly the conditions inside an aircraft fuel tank during MRO.

The EFi75xx fan motor is a Totally Enclosed Air-Over (TEAO) type rated at 0.75 hp. TEAO construction prevents internal combustion pathways by sealing the motor windings from the surrounding atmosphere, a critical design requirement when the surrounding atmosphere may contain Jet-A or aviation gasoline vapors. The IECEx certification scheme published by the International Electrotechnical Commission governs the testing and marking of this equipment class, and the EFi75xx’s whole-unit certification means the assembled fan, not just isolated components, has passed that evaluation.

How does the EF7400 Duct Wye Splitter enable simultaneous dual-wing ventilation?

The EF7400 Wye Duct Splitter transitions from a single 12-inch main duct diameter down to dual 8-inch branch ducts, allowing the EFi75xx ventilator to push airflow into both wing tanks simultaneously from one fan. When only one wing requires ventilation, the same wye configuration supports single-wing operation without removing or reconfiguring the splitter body.

The wye splitter measures 12″ x 8″ x 8″ and is described in the product specifications as tough and durable, sized for maximum airflow preservation through the transition. Each branch connects to a wing tank through the EF7300 Vent to Wing Tank Adapters (two included), which interface the duct end to the specific tank access geometry of the aircraft under maintenance. The ducting inventory on the cart includes four lengths of 8-inch conductive black duct (part FDT-0825CBB, each 25 feet / 7.6 m long), one length of 12-inch conductive black duct (FDT-1215CBB, 15 feet / 4.6 m), and one 100-foot (30 m) roll of 12-inch anti-static disposable duct (FDT-12DISPX), providing enough reach for wide-body aircraft wing geometries.

Why is conductive and anti-static ducting required for aircraft fuel tank ventilation?

Standard plastic ducting accumulates static charge as air and fuel-vapor particles move through it at velocity. Inside a fuel tank, that static discharge is an ignition source. Conductive and anti-static duct materials provide a continuous electrical path that bleeds charge to ground rather than allowing buildup to a spark-level potential.

The EB7325-WT inventory specifies conductive black duct (parts FDT-0825CBB and FDT-1215CBB) for the permanent duct runs and an anti-static disposable duct (FDT-12DISPX) for the 12-inch main trunk. This distinction matters operationally: the disposable anti-static duct can be discarded after contact with heavily contaminated tank atmospheres, preventing cross-contamination between aircraft without sacrificing the static-control property. Stainless steel duct couplers (DC12, 12-inch) and plastic couplers (DC8P, 8-inch) complete the connections without introducing metal-on-metal friction points inside the duct path.

What safety features on the EB7325-WT prevent hazards during hangar deployment?

The cart incorporates an automatic braking system that engages when the unit is unattended, preventing uncontrolled rolling on sloped or uneven hangar floors. Wheels are rugged, rubberized 8-inch units designed for hangar and tarmac surfaces. Integrated tie-down straps secure equipment during transport or when the cart is deployed in environments subject to aircraft blast or weather.

The power distribution box (part AT-SSPLEX4C110A2PEA-2PEA10) consolidates all equipment connections into four EX-rated socket outlets, keeping cabling organized and short. This reduces the number of independent power runs on the hangar floor and the associated tripping and arc risk. The lighting complement includes a 3-LED floodlight (AT-SS3LEDA110A2PEA10) for under-wing inspection and two handheld inspection lights (AT-SSP110A2PEZ10) for in-wing work, all powered from the same distribution box. Storage boxes on the cart frame house the conductive ducting, couplers, and adapters so components are not left loose on the floor around the aircraft.

Which aircraft maintenance environments is the EB7325-WT designed to operate in?

The EB7325-WT is designed for General Aviation (GA) facilities, commercial airline airport hangars, and military bases. The cart’s factory-mounted and palletized configuration means it ships ready for deployment and can be repositioned within a facility or between facilities without disassembly. Its rugged construction supports outdoor tarmac use as well as enclosed hangar environments.

Beyond fuel tank ventilation, the system accommodates broader MRO tasks: extracting toxic dust, fumes, aerosol contaminants, and vapors from confined aircraft spaces, and functioning as a mobile cabin air filtration or ventilation system. This operational range makes the cart a multi-task asset rather than a single-use item, which matters when a maintenance facility needs to justify capital equipment against multiple work orders. For a complete overview of deployment-ready MRO ventilation options, the RAMFAN Aircraft Ventilation Solutions product line covers the broader family of systems available for aviation applications.

What are the complete contents of the EB7325-WT parts list?

The EB7325-WT ships as a complete system. The Mobile Aircraft Fuel Tank Venting Cart frame is part MK-999940. The ventilator is the EFi75xx 12-inch unit at 115 VAC (part EB7201XX), mounted with the EB6100K mounting kit. Ducting consists of four lengths of 8-inch conductive black duct (FDT-0825CBB), one 12-inch conductive black duct (FDT-1215CBB), and one 12-inch anti-static disposable duct roll (FDT-12DISPX). The duct wye splitter is the EF7400, with connections made via a 12-inch stainless coupler (DC12) and 8-inch plastic couplers (DC8P). Two EF7300 wing tank adapters interface the ducts to the aircraft.

The lighting package and power distribution box complete the system. A 48-inch x 0.5-inch zip-tie (EZT48) is included for securing duct runs. Every component ships factory-installed and tested on the cart. This matters for MRO operations where procurement, assembly, and certification of individual components from separate vendors would each add lead time and introduce integration risk.

Where is the RAMFAN EB7325-WT applied in practice?

The EB7325-WT sees primary application in aircraft wing fuel tank purging before entry for inspection, repair, or fuel system component replacement. The simultaneous dual-wing capability of the EF7400 wye splitter reduces the ventilation phase of the MRO sequence, letting maintenance crews move to the next task phase without repositioning the cart between tanks.

Secondary applications include cabin ventilation during interior refurbishment, where solvent fumes from adhesives and sealants require continuous air movement, and extracting composite dust generated during fuselage or wing surface repairs. Military base MRO shops, which often operate under tighter deployment timelines than commercial facilities, benefit from the palletized-and-ready configuration. For detailed technical context on the EB7325-WT’s design rationale and safety value, see Enhancing Aircraft Safety with the RAMFAN Wing Tank Vent Cart and the in-depth operational breakdown at RAMFAN Wing Tank Vent Cart (EB7325-WT): The Fastest, Safest Way to Clear Fuel Vapors. Procurement teams evaluating the full system can review specifications directly on the Ramfan EB7325-WT Wing Tank Vent Cart product page. Additional safety and deployment guidance is available through the RAMFAN Wing Tank Vent Cart: The Aircraft MRO Ventilation System resource article.

When is the EB7325-WT the right choice, and when is it not?

The EB7325-WT is the right specification when a facility performs recurring wing fuel tank MRO work across multiple aircraft types and needs a self-contained, IECEx/ATEX-certified system that deploys without component sourcing or assembly. The 115/230 VAC dual-voltage capability makes it functional across North American and international hangar power standards without an additional transformer. The automatic braking, organized power distribution, and integrated lighting address the ergonomic and safety audit requirements of both commercial and military MRO environments.

The EB7325-WT is not the right tool for facilities that require only single-duct point extraction without the full cart infrastructure, or for operations where the 690 lb cart weight and 48″ x 32″ footprint cannot be accommodated in tight maintenance bays. In those scenarios, a standalone EFi75xx ventilator with individual ducting components would be the appropriate alternative from within the same RAMFAN product family. The full scope of portable aviation ventilation alternatives is covered under the RAMFAN Aircraft Ventilation Solutions category.