1. The operating temperature is below 200 degrees Celsius for cold oil pumps, and above 200 degrees Celsius for hot oil pumps.
2. Generally, the sealing mechanism of the hot oil pump is filled with sealing oil, but the cold oil pump is not filled.
3. The pump body of the hot oil pump adopts the vertical section type, while the pump body of the cold oil pump adopts the horizontal split type.
4. The gap of the hot oil pump mouth ring of the water-bath gasifier is relatively large. The cold oil pump is smaller.
5. Carbon steel and alloy steel are mostly used for hot oil pumps, while cast iron can be used for cold oil pumps.
6. The hot oil pump needs to be preheated before starting, and the cold oil pump is the same, but the cold oil pump is not used.
7. The support, bearing box, and mechanical seal of the packing box of the hot oil pump all need to be cooled by water, while the cold oil pump does not need to be used.
8. The model of the hot oil pump is generally represented by the letter R, and the cold oil pump is represented by the letter J.
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