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Hygienic double seat mix proof valve is a specialized type of valve used primarily in the food, beverage, pharmaceutical, and biotechnology industries. These valves are designed to prevent the mixing of two different fluids while allowing for the safe and efficient flow of each fluid through the system.

The non-retention 2-piece ball valve is a common valve type, mainly used for fluid control. Its design features two main components (valve body and ball), with a through hole in the ball, which can open and close the fluid when the ball rotates. The non-retention design means that when the valve is closed, the fluid will not be retained inside the valve, thereby reducing the retention time of the fluid and the possible risk of contamination.

Vacuum angle valve is a valve used to control the flow of fluid (gas or liquid) in a vacuum system.

The NPT hexagonal thread is a common fitting used for pipe connections, usually used in liquid or gas delivery systems. NPT (National Pipe Tapered) is a tapered pipe thread of the American national standard, with good sealing performance, suitable for various industrial applications.

Diaphragm tank bottom valves are used for discharging reaction vessels in clean industries such as pharmaceuticals, biology, fine chemicals, and food. 

Flexible bellows, such as those specified by ISO 160/63, are typically used in various applications to accommodate movement, absorb vibrations, and provide a seal in piping systems.

304 stainless steel vacuum bellows, particularly edge-welded bellows, are precision components designed for use in high-vacuum applications where flexibility, durability, and leak-tightness are critical.

The working principle of welding check valve: There are two water chambers inside. The cutoff port of the diaphragm water chamber is the water passage (the opening area of the cutoff port is close to the pipe diameter area), and the upper water chamber of the diaphragm is the pressure regulating chamber.