Electric function, automatic pressure relief and structural features such as locking devices. Floating ball apply to: chemical, petroleum, natural gas, metallurgy, and other industries and hydrogen sulfide-containing media, impurities, corrosion serious long distance gas pipelines. The main structural features floating ball is: a valve has opened, closed position indicator; 2 locking devices; 3 stem anti-fly structure; 4 antistatic device; five structural fire protection; 6 unique seating structure...... ; 7 flange (connected to the valve body and the left body portion) structure without leakage. Floating ball according to different requirements, based on the material in the shell is divided into: ordinary carbon steel (WCB & A105); stainless steel (304,316); cold steel series (LCB, LCC); anti-sulfur series. Floating ball valve suitable for general industrial use. 2 works floats always be floating in the water, when the water rose, floats followed the rise. Drift rose also rose on the drive rod. Connected to the other end of the valve rod, when up to a certain position, the piston rod support from the rubber pad, closed water. When the water level drops, the float also fell, driven by the piston rod and pad open. Float valve is adjusted by controlling the level of liquid supply. Flooded evaporator required to maintain a certain level height, generally suitable for the float expansion valve. Float valve works rely float float chamber by the action of lowering and raising the surface, to control a valve open or closed. Float chamber placed flooded evaporator side, up and down with the balance tube evaporator connected, so both the liquid level is consistent. When the level drops in the evaporator, the liquid level float chamber is decreased, then float down to open the valve relies on the leverage increases, increase the supply amount. And vice versa. 3 features and price comparison plastic float valve with auto open and close the pipeline to control the water level of functionality. Using high-quality refined copper, its small size and ease of installation, high sensitivity is enabled, a small head loss, water hammer phenomenon, can greatly improve the water tower (pool) utilization. Hole-type float valve with automatic open and close the pipeline to control the water level of functionality. For new water tower (pool), due to the much smaller volume of the float, leaving the tower (pool), the upper part should be left to float freely floating desired height is reduced accordingly, reducing the water tower (pool) of the cost, it overcomes the old pole float valve bulky, fragile, unreliable and a lot of work Shigemi ills. It is your ideal water tower (pool) water level of the latest automatic control valves for existing water tower (pool) need to replace old-fashioned float valve is suitable replacements. Stainless steel float valve with plastic float valve function is almost the same, but the stainless steel ball valve price than the price of the plastic float valve former is much higher, ranging from 12 to 75 yuan, which is 1 million, which they should both about life