1. Regionality: At present, most domestic products are facing the dilemma of having no technology or spare parts. Because of the regional problems of raw materials, the prices of vacuum pumps are uneven.

2. Technology: It is well known that the products manufactured by high-tech mature and high-standard processing and production equipment have better stability, reliability and life than those produced by low-level production, and their prices are relatively high.

3. Accessories Quality: Vacuum pump mainly consists of filter screen, marble, exhaust hood, back end plate, water cover plate, belt pulley, front axle, exhaust hood gasket, low rotor, exhaust valve sheet, front end plate, oil seal chamber, oil screen, window, air intake nozzle, high rotary blade, spring, pump shell, key, aeration valve, seal ring, high rotor, positioning pin, middle partition plate, chassis, oil plug and other accessories. Composition, the quality of these accessories directly affects its price.

4. Material of pump body: The material of pump body is divided into nodular cast iron and gray cast iron. Nodular cast iron is spheroidized and inoculated to obtain spheroidal graphite, which effectively improves the mechanical properties of cast iron, especially the plasticity and toughness, thus obtaining higher strength than carbon steel. Its comprehensive performance is close to steel, therefore, the price is relatively high.