Reliable valve stem sealing: it has two sealing surfaces, and the sealing surface material of the ball valve is widely made of various plastics, with good sealing performance and complete sealing. It has also been widely used in vacuum systems. Since the valve stem only operates as if it is rotating rather than lifting, the packing seal of the valve stem is not easy to be damaged, and the sealing capacity increases with the increase of the pressure of the medium.

Advantages of hoses in use
(1) The iron and steel metallurgy industry is gradually transitioning from product performance competition to performance price competition. The product structure is basically finalized. The application of pneumatic butterfly valves in this industry has been widely recognized.
(2) The petrochemical industry has a relatively complex situation. On the one hand, the market demand for large diameter high-pressure hoses and tank central drain hoses is growing, but the domestic new product development in this area is far from being in place. On the other hand, hoses in some places have been replaced by other products, such as non-metallic pipes (light weight, suitable pressure resistance) in the wharf pipe market. As the petrochemical industry is a relatively large domestic market for flexible pipes, the competition in this field is fierce, and the cost of new product development in this field is also large.
(3) Railway locomotive industry. As the materials of the Ministry of Railways have finalized the regular composite hose mode, the product structure will not change much in recent years, which is mainly reflected in the competition of price and service. However, in the long run, due to the complex operating conditions and the uncertainty of the damage of the composite hose, it is inevitable that the hose in this industry will be replaced by the pneumatic butterfly valve from the perspective of the development of the hose abroad, so the product development is far from complete.
(4) In the shipbuilding industry, there is no special technical performance request for the product except that the demand is tested by the classification society. However, according to foreign and domestic materials, the market demand is also very large.
(5) In civil construction, water conservancy equipment and other industries, except for some finalized hoses (such as water pipes), the trend of thick wall pipes replacing elbows has not been developed in China. According to Japanese materials, its domestic application prospects are no less than the market of hoses for water heaters. The automobile industry, mainly the market of bellows flexible joints for exhaust pipe system, has great potential with the increasing family oriented automobile. At present, the development trend of this product is good! The main problems to be solved are the stability of product performance, the improvement of consumption rate and the reduction of cost.
So what should we pay attention to when purchasing pneumatic butterfly valve models?
Can directly click to see why the international competitiveness of the machinery industry is weak
The weak domestic competitiveness is mainly due to the relative lag and overall aging of the mechanical processing industry, and the prevailing strong demand for imported hoses.
In the domestic market, many consumer enterprises often lack central competitiveness because of weak technological innovation ability, too single market structure, weak brand influence and other factors. It is difficult to become bigger and stronger, so innovation is the most important.
In the past, the domestic hose market has become increasingly picky about quality and brand. Both dealers and direct hose users pay great attention to quality and brand. They hope that through trade agreements and exchanges, they can gradually enhance their competitiveness.