Application and purchase standard of glass rotameter
Oct 25, 2018
Glass rotameter is applicable to medicine, chemical fertilizer, chemical industry, petroleum, light industry, chemical fiber, food, dye, environmental protection and scientific research. It is used to measure the flow of single-phase non pulsating (liquid or gas) fluid. Corrosion resistant glass rotameter is mainly used to detect the flow of corrosive liquid and gas media, such as strong acid (hydrofluoric acid outside), strong alkali, oxidant, strong oxidizing acid, organic solvent and other corrosive gas or liquid media.
Purchase standard of glass rotameter
Measurement object 1. That is to measure the type of medium, pressure and chemical properties. Such as liquid medium and gas medium, corrosion-resistant flowmeter shall be selected for corrosive medium.
2. Function of flowmeter. After the above conditions are determined, generally speaking, if there is no major change in the price, the needle valve placed on the upper part of the flowmeter can be preferred; If there is a large flow hole, it is a direct flow scale; Simple structure; Smaller external scale and so on. In case of small flow planning, the ball float type can be selected, because it is stable in measurement, not easy to accumulate dust, high precision and good interchangeability.
3. Select according to the price. Generally speaking, the price of high precision is high.
4. When the fluid flows through the conical tube from bottom to top, the lift s generated by the fluid kinetic energy on the float and the buoyancy a of the fluid make the float rise. When the sum of lift s and buoyancy A is equal to the gravity g of the float itself, the float is in balance and stable at a certain height and orientation, and the scale on the conical tube indicates the flow value of the fluid.
