Dongde Industrial

Hydrogen circulation pump (Hydrogen Circulation Pump) for the anode of hydrogen fuel cells, a core BOP component of the fuel cell that drives the recirculation of unreacted hydrogen from the stack to improve hydrogen utilization and manage the stack's water balance. Dongde started with hydrogen circulation pumps in 2017; its products were appraised by the China General Machinery Industry Association as filling a domestic gap, with overall performance reaching internationally advanced levels, and its defrosting technology leading internationally. Its domestic market share ranked first for three consecutive years from 2019 to 2021. Representative parameters (official DQ60 page): motor speed 0-8000 rpm, pressure rise 50 kPa, flow rate 60 Nm3/h, rated power 2 kW, dimensions 256x161x121 mm, matching fuel cell systems of 70-120 kW. The Dongde official 'Hydrogen Circulation Pump Parameter Table' (dondel-ne.com) gives full-series metrics: DQ10H/L speed 5500~21000 rpm, pressure rise 15 kPa, flow 7.8 m3/h, power 0.3 kW, dimensions 105x100x182 mm, IP67, -40~85℃, matching 10-15 kW; DQ20L speed 3000~22000 rpm, pressure rise 25 kPa, flow 35 m3/h, power 0.6 kW, matching 15-60 kW; DQ47H/L speed 700~6500 rpm, pressure rise 30 kPa, flow 20 m3/h, power 0.5 kW, dimensions 222x147x157 mm, matching 20-60 kW; DQ30H speed 1000~9000 rpm, pressure rise 40 kPa, flow 30 m3/h, power 1.0 kW, dimensions 220x162x121 mm, matching 60-100 kW; DQ60I speed 1000~9000 rpm, pressure rise 40 kPa, flow 55 m3/h, power 1.2 kW, dimensions 265x160x138 mm, matching 90-150 kW. The whole series features low-temperature start and defrosting (down to -40℃), IP67 and EMC verification, CAN2.0A/B communication, over-temperature/over-current protection, and a mature explosion-proof design. In addition, DQ6, DQ56 and DQ80 are new products planned/released in 2023.

Matches 70-120 kW (DQ60); pressure rise 50 kPa; flow 60 Nm3/h; rated 2 kW; speed 0-8000 rpm; dimensions 256x161x121 mm; full series low-temp defrost -40℃; IP67; CAN2.0A/B

• Hydrogen fuel cell system
• Fuel cell logistics vehicle
• Fuel cell refrigerated vehicle
• Fuel cell bus
• Fuel cell truck
• Fuel cell commercial vehicle
• Fuel cell forklift
• Hydrogen fuel cell power generation

High-speed centrifugal/Roots-type air compressor for hydrogen fuel cells (Fuel Cell Air Compressor), supplying pressurized clean air to the stack; a core air-supply BOP component of the fuel cell. Dongde adopts proprietary air-bearing technology — oil-free and wear-free — with an integrated inlet/outlet design, supports CAN2.0A/B, and the motor and controller pass IP67 and EMC verification, with over-current/over-temperature protection and fault logging. Representative parameters (official DK600 page): matches fuel cell power 60-100 kW, max pressure ratio 3.1, rated flow 90 g/s @ Pr2.6, rated power 15 kW; according to FuelCellChina/Dondel official data, DK600 weighs 9.6 kg, dimensions 342x256x186 mm, water-cooled, operating voltage 450-750 V, max power 17 kW, ambient temperature -30~65℃. DK800C (official page): matches 80-120 kW, max pressure ratio 3.4, rated flow 150 g/s @ Pr2.8, rated power 22 kW. The full series covers roughly 10 kW~300 kW fuel cell systems; among them the DK-T series are high-speed centrifugal compressors with energy-recovery expanders (e.g. DK800T, DK1000T, DK12T, DK15T), and DK16 and DK18 are new products planned for 2023.

Matches 60-100 kW (DK600); max pressure ratio 3.1; rated flow 90 g/s @ Pr2.6; rated 15 kW; 450-750 V; water-cooled; IP67; CAN2.0A/B

• Hydrogen fuel cell system
• Fuel cell logistics vehicle
• Fuel cell refrigerated vehicle
• Fuel cell bus
• Fuel cell truck
• Fuel cell commercial vehicle
• Hydrogen fuel cell power generation

Hydrogen common rail system (Hydrogen Common Rail System / Ejector-Integrated Hydrogen Supply Module), highly integrating the hydrogen circulation pump, ejector, water separator, proportional valve, drain valve, exhaust valve and pressure sensor (DG56 also integrates the pump controller) into an anode hydrogen-supply loop module, combining active control with passive ejection, covering an ultra-wide power range, reducing hydrogen-line piping connections and leakage risk, and improving system power density. DG20 (official page and third-party Dongde shop data): motor power 0.6 kW, rated speed 22000 rpm, rated pressure rise 20 kPa (max 25 kPa), rated flow 3000 NL/min, protection rating IP67, dimensions 195x155x220 mm, operating voltage 24 V, adapted to system power 100-200 kW, newly added hydrogen filtration accuracy 20 μm, with defrost function. DG47 (FuelCellChina official page): weight 9 kg, dimensions 270x235x160 mm, air-cooled, max ambient temp 65℃/min -30℃, operating voltage 24 V/540 V, max power 0.7 kW, hydrogen filtration accuracy 20 μm; according to the Dongde parameter table, DG47L flow 180 m3/h, matching stacks of about 150-300 kW. DG56 (2nd generation, released at FCVC2024): pump + ejector + water separator + proportional valve + drain valve + exhaust valve + pressure sensor + pump controller highly integrated, smaller in size and weight, easier to control, covering a wider power range. At low power the circulation pump and ejector work together (pump dominant); at high power the ejector is dominant and the circulation pump auxiliary to save electricity.

Integrates hydrogen circulation pump/ejector/water separator/proportional valve/drain valve/exhaust valve/pressure sensor; DG20 matches 100-200 kW; power 0.6 kW; pressure rise 20 kPa; flow 3000 NL/min; IP67; 24 V; hydrogen filtration 20 μm; DG47L matches 150-300 kW

• Hydrogen fuel cell system
• High-power fuel cell system
• Fuel cell commercial vehicle
• Fuel cell heavy-duty truck

A water-gas separation component (Water Separator) in the hydrogen circulation loop of hydrogen fuel cells, a supporting part of the hydrogen circulation system, listed in the Dongde official product center. The official public detail page gives only the product name and an image, without disclosing independent technical parameters; this component also appears as an internal integrated module (water separator) of the DG-series hydrogen common rail system. Its role is to separate liquid water from the anode recirculation gas, manage the stack's water balance, and avoid flooding.

Supporting component of hydrogen circulation system; separates liquid water from anode recirculation gas; manages stack water balance and prevents flooding; integrated as internal module of DG-series common rail system

• Hydrogen fuel cell hydrogen circulation system
• Fuel cell water-thermal management