Molecular formula :
nature : also known as valves and valve. Control of fluid flow in the pipe components. Its functions are : (1) hoist, or cut off communication pipe fluid flow; (2) regulatory role in changing pipeline resistance, regulating fluid through the pipe flow; (3) reducing expenditure, allowing fluid through the valves after great pressure drop; (4) based on certain factors automatically open and close to control the flow of fluid to maintain pressure or other role. According to the action principle can be divided into : (a) he valve, screw plug, cut powerful family, diaphragm valves, valve disc gate valve; (2) automatic valves (automatic valve), Check Valves, safety, etc. 11. According to the manipulation of power, can be divided into manual control, motor control, electromagnetic control, pressure control, hydraulic control.
Notice:Each item can have many explanations from different angels. If you want grasp the item comprehensively,please see below "more details data".