The AIFILTECH Airport Vehicle Exhaust Purifier 4 is fitted after the exhaust line of airfield tractors. TPS water-washable metal elements (metal DPF, patent No. ZL 2018 1 0598975.7) deliver over 90% particulate filtration efficiency with one-minute regeneration; the all-metal build resists vibration under low-speed heavy-load operation.
Guangzhou TUOKAI Environmental Protection Technology Co., Ltd. was founded by professionals with over 20 years of experience in high-temperature flue gas treatment and diesel engine exhaust after-treatment, holds multiple independent intellectual property rights, and professionally supplies high-temperature flue gas (exhaust) treatment products and equipment for a wide range of applications.
The AIFILTECH Airport Vehicle Exhaust Purifier 4 (for tractors) is installed after the exhaust line of airfield tractors. Its core is a TPS water-washable regenerative metal filter element (metal DPF, patent No. ZL 2018 1 0598975.7), delivering over 90% particulate filtration efficiency with one-minute water-wash regeneration. Nearly 5,000 units are in service nationwide.
Gas processing volume is customised to the engine displacement. The open engine bay and heavy vibration of tractors are addressed with customised mounting and damping.
Exhaust gas emitted by the diesel engine enters the AIFILTECH purifier at the inlet. The gas, laden with carbon particles, passes from the outside to the inside through the wall of each TPS water-washable metal filter element (metal DPF, patent No. ZL 2018 1 0598975.7), where the particles are captured; the clean gas leaves through the outlet.
The purifier is connected in-line after the vehicle's original exhaust pipe. Hot exhaust is filtered by the TPS metal elements; black smoke and carbon particles are held on the element surfaces while the cleaned gas discharges through the outlet. The compact element layout keeps back pressure low and barely affects vehicle performance.
As the vehicle runs, carbon particles accumulate on the element surfaces and back pressure gradually rises. Once it reaches the set value (typically 25 kPa), shut down the engine, release the clamps, pull out the elements and rinse them under a tap; refit and re-tighten the clamps and the unit is ready again. Regeneration takes about one minute — no replacement elements or consumables are needed.
The product has passed tests by CMA, CAL, ILAC-MRA and CNAS accredited laboratories and obtained a qualified report, with a measured light absorption coefficient of less than 0.5 m⁻¹, meeting current emission standards.
Since the AIFILTECH water-washable regenerative metal purifier was successfully developed, this core product line has accumulated nearly 5,000 installed cases in the after-treatment industry. Our products took part in non-road vehicle retrofit programs in Nanjing as early as 2018, with nearly 1,000 successful cases in the Nanjing market alone and users across the country. The products have been applied in demanding non-road sites such as Beijing Capital International Airport, Guangzhou Baiyun International Airport, Xiamen Airport, Nanchang Airport and Nanning Airport. Airport ground support equipment is one of the key application fields of AIFILTECH exhaust purifiers.
Applicable scenarios: all kinds of diesel-powered airport ground support vehicles and non-road machinery. Selection calculation, installation guidance and commissioning support are available.
All data above are obtained under specific test conditions; the actual solution must be engineered to site conditions. AIFILTECH provides custom design and sizing based on actual gas volume, temperature, dust characteristics and emission limits.
