The model is a code characterizing the performance characteristics. The model system of heat conduction oil pump products in China is composed of three parts. Its composition is as follows:
The first part represents the suction inlet diameter of the pump, in mm, expressed in Arabic numerals. Most old products are expressed in "inches", that is, the integral value of the suction inlet diameter divided by 25;
The second part represents the basic structure, characteristics, use and material code of the pump, which is expressed in Chinese phonetic alphabet. The basic model code of heat conduction oil pump is shown in Table 6-1. The material code indicates that the industrial material is nodular cast iron which is not resistant to corrosion. Class II material is not corrosion-resistant carbon steel; Class III materials are corrosion-resistant stainless steel.
Third part representing pump lift and series, many old products is than the revolutions of the pump was 10, in addition to the integer value after said the new pump most of the single-stage pump head, said the unit is m, for multi-stage pump, the third part number consists of two parts, the multiplication sign off in the middle and multiplication sign in front of the digital representation of single-stage pump head, the multiplication sign the back of the digital representation of pump series. The modified product logo of heat conduction oil pump is at the tail of the model, with capital Chinese pinyin letters A, B, C to represent the impeller after cutting, where A represents the first cutting, B represents the second cutting, C represents the third cutting, which is also the limit cutting of the impeller.
