Due to the gradual development of my country's construction machinery industry and the guidance of a series of industrial policies, the liquid and gas tightness industry has grown rapidly in recent years.

According to incomplete statistics, in 2021, the total industrial output value of enterprises above designated size in my country's liquid and gas tightness industry will be 77.271 billion yuan, a year-on-year increase of 21%. Among them, the hydraulic industry completed 43.620 billion yuan, a year-on-year increase of 18.47%; the pneumatic industry completed 15.046 billion yuan, a year-on-year increase of 29.60%; the sealing industry completed 18.605 billion yuan, a year-on-year increase of 23.95%.

Among the 125 key companies in the liquid and airtightness industry, there are 64 in the hydraulic industry, 6 in the hydraulic industry, 40 in the pneumatic industry, and 15 in the sealing industry. The total industrial output value of these key enterprises was 33.424 billion yuan, a year-on-year increase of 12.94%. Among them, the output value of hydraulic enterprises was 14.171 billion yuan, a year-on-year increase of 7.72%; the output value of hydraulic enterprises was 533 million yuan, a year-on-year decrease of 4.77%; the output value of pneumatic enterprises was 8.639 billion yuan, a year-on-year increase of 25.12%; the output value of sealing enterprises was 7.320 billion yuan, a year-on-year increase of 25.12%. An increase of 11.14%.

The good development prospects of the liquid and airtight industry have also attracted a lot of investment from both inside and outside the industry. According to incomplete statistics, the investment in the liquid and airtight industry in the past two years is no less than 30 billion yuan, of which the investment in hydraulic pressure in the main engine industry such as construction machinery accounts for about 50% of the total investment.

However, the localization of high-end hydraulic parts is impossible to complete in the short term, but a long-term goal.