The ball of the soft seal pneumatic ball valve is carbon steel chrome plated, the seal ring is extruded PTFE or RPTFE, and the contact surface between the valve seat seal ring and the ball is conical. Taking the pneumatic ball valve process produced by most manufacturers as an example, when closing the pneumatic ball valve, the length of both ends of the ball is 58mm and the large end of the cone plane of the valve seat seal ring Ф 58.5mm coaxial. When the valve cover is fastened, the sealing ring is pressed evenly in the circumferential direction, that is, the deformation on the circumference of the sealing ring is the same. However, in fact, it rarely achieves the ideal state. The position of the ball is often caused by the position error of the ball and the connecting groove of the valve stem, the position error of the valve stem head, the error of the valve block and the small clearance of the connecting groove. After the valve cover is fastened, the circumference of the seal ring likes to squeeze to form a boss. The larger the compression amount, the more serious the boss will be, and the opening and closing torque of the pneumatic ball valve will also be greater. Even if the square hole of the handle is damaged, it still cannot be started. The formed boss will cause uneven movement and leakage during the opening and closing process.

Price of waterproof casing
The price of waterproof casing products will be affected by various factors. Although the main part of the product is steel, it is only one of them. It is believed that the soaring house prices and rents in recent years have put pressure on physical stores or shops, and another reason is that the cost of labor increases year by year. The price of land rent increases, and the price of products in the market decreases year by year. On the one hand, it is market competition, Competitors' prices are getting higher and higher, and the prices are getting more reasonable
However, when the profit of the product is reduced to the extent that consumers can afford, the quality of the product will reach the quality of water, which is why consumers always feel that there is a certain price gap between manufacturers when purchasing waterproof shells. Mold, high consumption efficiency, low price, why expensive, here will explain
Manufacturers are usually more conventional and reputable. The reason for the products is that the quality of their products is constantly in accordance with national standards, such as flexible waterproof casing will shrink, and some irregular manufacturers will use national standards to save costs and flange thickness on the surface of products. Almost the same, but flanges and flanges will shrink, because we cannot distinguish them and appearance separately
Ordinary measuring tools cannot measure. In addition, only one side of welding is needed, but conventional manufacturers will not do so. For example, like our company, we have a strict technical monitoring department. After the waterproof shell waste is completed, the authoritative department will suspend the inspection of the third-party inspection department and issue a certificate of conformity. The company continues to focus on integrity, Treat every customer with a quality first attitude, and have obligations to users and us