When recycling end-of-life air conditioners and refrigerators, safely extracting refrigerant is a critical first step. The SD-680 refrigerant extraction machine, manufactured by San Lan Technologies, offers a practical solution for workshops and recycling facilities that need reliable performance without unnecessary complexity. This article breaks down the full technical specifications, operational features, and real-world applications of this refrigerant recycling machine to help buyers make an informed decision.
Complete Technical Specifications of SD-680
The SD-680 is engineered to handle a wide range of refrigerants commonly found in household and light commercial appliances. Below is the full datasheet directly from the manufacturer's specifications:
| Parameter | Specification |
|---|---|
| Model | SD-680 |
| Compatible Refrigerants | R404A, R407C, R410A, R134A, R507, R22, R12, R502 |
| Power Supply | 220V-240V ~ 50Hz/60Hz |
| Compressor Power | 3/4 HP |
| Average Recovery Rate (Liquid) | 50 kg/hour |
| Average Recovery Rate (Gas) | 25 kg/hour |
| Collection Cylinder Capacity | 15 kg per cylinder |
| Overall Dimensions (L x W x H) | 600 x 460 x 1150 mm |
| Net Weight | 75 kg |
Key Design Advantages
Beyond raw numbers, the SD-680 incorporates several design features that improve day-to-day usability and safety in industrial environments:
- Dual Input Design: Two separate input ports allow technicians to connect both high-pressure and low-pressure lines simultaneously, cutting recovery time significantly compared to single-port units.
- Multi-Stage Filtration: Built-in filters remove impurities from recovered refrigerant, protecting both the machine and the quality of reclaimed coolant.
- Oil Separation: A dedicated oil separator removes lubrication oil mixed with refrigerant during extraction. This prevents contamination and extends the service life of downstream equipment.
- Air Separation: Non-condensable gases are separated automatically, ensuring the recovered refrigerant meets reuse standards.
- Automatic Stop Functions: The unit halts automatically when recovery is complete or when the collection cylinder reaches full capacity, preventing overfill and reducing operator oversight.
- Overvoltage Protection: Electrical safeguards protect internal components from voltage spikes, an essential feature in facilities with unstable power supply.
How the SD-680 Fits Into a Recycling Workflow
In a typical appliance recycling line, the SD-680 handles the first stage: refrigerant extraction. Once the compressor is drained and refrigerant is safely recovered, the appliance body moves to a refrigerator recycling equipment line for shredding and material separation. This sequential approach ensures compliance with environmental regulations while maximizing material recovery rates.
San Lan Technologies, the manufacturer, has supplied recycling equipment to customers in over 21 countries since 2007. Their product range covers lead acid battery recycling, lithium battery recycling, circuit board recycling, cable recycling, and full appliance dismantling lines. The SD-680 is positioned as an entry-to-mid-level refrigerant recovery unit suitable for facilities processing 20 to 80 appliances per day.
Practical Operation Notes
The SD-680 uses a straightforward workflow. Technicians connect the machine to the appliance copper tube via a punch clamp attached to the low-pressure input slot. The low-pressure gauge indicates whether refrigerant is present. If the gauge reads positive, the operator opens the input and output valves, starts the recovery cycle, and waits for the gauge to ｄｒｏｐ to zero. An indicator light signals when the process is running and extinguishes upon completion.
Oil accumulated from compressor lubricant must be drained after approximately 30 refrigerators or 10 air conditioners. This is done by opening the oil-draining valve slowly while the unit is powered on, collecting the waste oil in a dedicated bottle. Similarly, if the high-pressure gauge exceeds 1.5 MPa during standby, non-condensable gas must be vented by briefly opening the gas-draining valve until pressure drops below 1.2 MPa.
One critical protocol: when switching between different refrigerant types, the collection cylinder must be completely emptied and evacuated to vacuum. This prevents cross-contamination, which would render the recovered refrigerant unusable and potentially damage the machine.
Who Should Consider the SD-680
This unit is best suited for small-to-medium recycling yards, e-waste dismantling facilities, HVAC service companies, and appliance repair shops that regularly handle refrigerant-bearing equipment. Its 75 kg weight and compact footprint (600 x 460 x 1150 mm) allow it to fit into tight workshop spaces without requiring permanent installation. The 220V-240V single-phase power requirement also means it can operate in most standard electrical environments without three-phase infrastructure.
For facilities with higher throughput needs, San Lan also manufactures the RRM-650 stationary refrigerant recycling machine, which offers faster processing speeds and larger capacity. However, for operators prioritizing portability, lower capital investment, and compatibility with the most common legacy and modern refrigerants, the SD-680 delivers solid value.
Summary
The SD-680 refrigerant extraction machine combines practical specifications with user-friendly safety features. With a 3/4 HP compressor, dual-input design, multi-stage filtration, oil and air separation, and automatic shutdown controls, it addresses the core requirements of refrigerant recovery without overcomplicating the operator's job. The 50 kg/hour liquid recovery rate and 15 kg collection cylinder make it appropriate for facilities handling moderate volumes of end-of-life cooling appliances. For buyers evaluating refrigerant recovery options, the SD-680 offers a balance of performance, safety, and operational simplicity that aligns well with real-world recycling demands.
