Working Principle

LZB/ LZG series of glass rotameter is widely applied in chemical engineering, petroleum, light industry, medicine, environment protection, food, measurement and test, scientific research and other departments and used to measure the flows of single-phase non-pulsating fluid (liquid or gas).

LZB/()F/LZJ-()F series of corrosion-resistant glass rorameter has a strong corrosion resistance, can be used to measure the flows of acid(except for hydrofluoric acid), alkaline, oxidizing agent and other corrosive gas or liquid and is suitable for chemical engineering, pharmacy, paper making, sewage treatment and other industries.

Product features

Table 1                unit: mm

Notes: flange standards GB/T119-2000 DN(15-50), DN(125-150) PN1.0MPa
DN(80-100) PN0.6MPa

Principle and structure

Flowmeter consists of a subuliform glass tube expanding from bottom to top and a floater moving up and down with the change of flow of fluid (Fig 3). When fluid flows through subuliform from bottom to top, the lift force S produced by fluid kinetic energy and the floatage A of fluid make floater rise. When the sum of lift force and floatage is equal to the gravity G of floater, floater is in a stable state and located at a height and the scale on subuliform glass tube indicates the flow of fluid.
The position of floater in flowmeter is shown in Fig 4.

Fig 3