According to the driving method, it is divided into automatic valve type, power driven valve type and manual valve type:

An automatic valve is a valve that does not require external force to drive, but relies on the energy of the medium itself to actuate the valve. Such as safety valves, pressure reducing valves, traps, check valves, automatic regulating valves, etc.

Compressed air driven valve. Hydraulic valve: A valve that is driven by a liquid pressure such as oil.

In addition, there are combinations of the above several driving methods, such as gas-electric valves.

Manual valve: The manual valve uses manpower to manipulate the valve action by means of the hand wheel, handle, lever and sprocket. When the valve opening and closing torque is large, a gear or worm gear reducer can be provided between the hand wheel and the valve stem. If necessary, you can also use the universal joint and the drive shaft for remote operation.

Color Masterbatch is one general name for all colorful masterbatch. It includes all colors, such as red, green, yellow, blue, orange, violet so on. This masterbatches are made with color pigments and PE carrier, with some calcium carbonate and chemical additives and PE wax. The applications includes blowing film, injection, molding and extrustion so on. The colors have two kinds: one standard general colors and custom-made colors. 

Color Masterbatch

Color Masterbatch,Color Pantone Masterbatch,Plastic Color Masterbatch,Color Pellets Masterbatch,Color Concentration Masterbatch

Anda Masterbatch( Group) Co., Limited , http://www.polymer-masterbatch.com