Some non original grain wheel compressors often appear on the market. A brief introduction to how to distinguish between original grain wheel compressors and non original grain wheel compressors is as follows:
Identification of price barriers
Before purchasing a Gulun compressor, it is important to check whether the sales store is regular and whether there is a significant gap between the price and other sellers.
2 paint, surface identification
Currently, most refurbishing machines are spray molded, so it is difficult for non professionals to distinguish between the paint, but the original paint is smooth and black, and the spray molded paint is a bit dark.
3 Identification from high and low pressure pipe orifices
The high and low pressure pipe orifices of regular Gulun compressors are all copper plated. If you purchase a compressor with copper orifices for both high and low pressures, you can directly "pass" it off. However, there is also a high imitation machine with a copper plated mouth. If such a situation occurs, carefully observe the mouth. From the perspective of technology and smooth appearance, it can also be identified.
4. Identify from the wiring terminal
Terminal blocks are the best way to identify them. No matter how skillful their renovation techniques are, they cannot be changed. The degree of novelty of the terminal blocks, as well as the grounding screw {The grounding screw is green in the fully enclosed Gulun ZB/ZR series, and this type of screw is difficult to buy on the market}
5 Identification from the movement
The movement cannot be seen, so pour out the refrigerant oil, and the clarity and taste of the refrigerant oil can be distinguished. Moreover, the original grain wheel machine has nitrogen pressure retaining inside, which is not the kind of gas that can be sucked into it by pulling a plug, which is also impossible for a refurbished machine to achieve.