whkdzw027@qq.com
+86 15827230221
+86 027-86861986
The KDQH-300 is a mobile, refrigerated SF6 gas recovery unit independently developed by Wuhan Kodien Zhongwei Electric Co., Ltd. It is designed for the recovery, purification, storage, and refilling of sulfur hexafluoride (SF₆) gas in high-voltage electrical equipment. The unit fully complies with DL/T 662-2009 Technical Conditions for SF6 Gas Recovery Devices and GB/T 44653-2024 *Guidelines for On-site Recycling and Reuse of SF6 Gas*. It is an ideal solution for the electric power industry to achieve SF6 recycling and meet carbon reduction targets.
Type: Mobile, refrigerated
Operating ambient temperature: -10°C (-30°C optional) ~ +40°C
Storage method: Liquid state
Noise level: ≤75 dB (sound pressure level)
Pressure – freeze liquefaction of SF6 gas using compressor
Dryer assists gas recovery and refilling
During refilling, gas is vaporized via buffer (heating available)
| Parameter | KDQH-300 Value |
|---|---|
| Ultimate vacuum of unit | ≤0.1 Pa |
| Evacuation rate | ≥60 m³/h (vacuum pump ultimate vacuum <0.06 Pa) |
| Initial refilling pressure | <133 Pa |
| Final refilling pressure | ≤0.8 MPa |
| Refilling rate | >6 m³/h |
| Initial recovery pressure | ≤0.8 MPa |
| Final recovery pressure | < -0.053 MPa (gauge) |
| Recovery compressor rate | ≥12 m³/h |
| Annual leakage rate | <1% |
| Maximum design pressure of storage tank | 4 MPa |
| Storage tank capacity | 200 kg (liquid) |
| Power supply | AC three-phase 220V/380V ±10%, 50Hz |
| Total power | <13 kW |
| Dry filter regeneration method | Vacuum regeneration with heating activation |
| Purification outcome | Moisture ≤60 ppm, Oil ≤5 ppm, Particles ≤1 μm (100% filtration) |
Note: Final recovery pressure < -0.053 MPa (gauge) corresponds to absolute pressure <20 kPa, indicating industry-leading recovery efficiency.
The KDQH-300 consists of the following functional components:
| Component Category | Specific Components |
|---|---|
| Core power units | Compressor, vacuum pump |
| Refrigeration & heating | Refrigeration system, heater |
| Purification system | Dry filter regenerator, purifier, filters |
| Piping & control | Pipes, valves, gauges, electrical control system |
| Structural parts | Frame panel, casters, storage tank |
All components work together to achieve the complete process of SF6 gas recovery, purification, liquefied storage, and refilling.
| Parameter | Specification |
|---|---|
| Theoretical displacement | 12 m³/h |
| Maximum discharge pressure | 2.5 MPa |
| Minimum suction pressure | 53 kPa |
| Maximum suction pressure | 0.35 ~ 0.8 MPa |
| Power | 3 kW |
| Power supply | 380V 50Hz |
| Parameter | Specification |
|---|---|
| Cooling method | Air-cooled, suitable for continuous operation |
| Evacuation rate | ≥60 m³/h |
| Ultimate vacuum | ≤0.1 Pa |
| Power | 3 kW |
Domestic compressor, reliable and stable performance
Two-stage filtration
Vacuum activated self-regeneration treatment
Type: Ball valve
Size: DN15
Material: SF6-specific
One year warranty on the whole unit, lifetime maintenance
The KDQH-300 standard delivery includes:
| No. | Item | Quantity | Remarks |
|---|---|---|---|
| 1 | Main recovery unit | 1 set | Mobile, refrigerated type |
| 2 | Storage tank | 1 unit | Built-in, 200 kg capacity |
| 3 | Vacuum gauge | 1 unit | Mounted on main unit, Shanghai thermal couple type |
| 4 | High-pressure hoses | 2 pieces | SF6-specific |
The KDQH-300 is suitable for the entire life cycle of power equipment:
Equipment manufacturing plants: Evacuation and initial SF6 filling of GIS, circuit breakers, transformers before delivery
Field installation: Evacuation and gas filling of assembled gas compartments at substation sites
Operation & maintenance: SF6 recovery before scheduled maintenance; purification and refilling after maintenance completion
Decommissioning: Final recovery and disposal of SF6 gas from retired equipment
The KDQH-300 features a mobile hand-push structure with integrated compact design, equipped with swivel casters and air-cooled heat dissipation, ideal for indoor and outdoor mobile operations in substations and workshops.
Driven by global carbon reduction policies, demand for SF6 gas recovery units continues to grow. The KDQH-300 achieves a final recovery pressure < -0.053 MPa (gauge), representing industry-leading recovery efficiency. Post-purification moisture ≤60 ppm, oil ≤5 ppm, and particles ≤1 μm ensure gas purity for reuse while significantly reducing greenhouse gas emissions. As national standards are fully implemented, high-efficiency, reliable SF6 recovery units will become standard equipment in the power industry.
Wuhan Kodien Zhongwei Electric Co., Ltd. is located in Optics Valley – Wuhan East Lake High-tech Development Zone. It is a high-tech enterprise integrating R&D, production, sales, and service. The company specializes in power test instruments and SF6 gas recovery and treatment equipment, holding multiple patents and software copyrights. The KDQH series SF6 recovery units have been deployed in hundreds of substations and manufacturing plants, earning strong customer trust.
Quality commitment: One year warranty on the unit, lifetime maintenance.
For more information on the KDQH-300 SF6 Gas Recovery Unit, including detailed technical proposals, pricing, and field case studies, please contact us.
| Parameter | Value |
|---|---|
| Final recovery pressure | < -0.053 MPa (gauge) |
| Ultimate vacuum | ≤0.1 Pa |
| Evacuation rate | ≥60 m³/h |
| Refilling rate | >6 m³/h |
| Recovery compressor rate | ≥12 m³/h |
| Built-in tank capacity | 200 kg (liquid) |
| Power supply | Three-phase 380V ±10%, 50Hz |
| Total power | <13 kW |
| Weight | approx. 450 kg |
(Complete specifications as per factory manual)
