Glass rotor flowmeter
是一种变面积式流量计，用于检测通径100mm以下封闭管道中液体或气体的瞬时流量的现场指示型仪表，适用于微小流量的测量和调节;不需从管道上拆下即可方便地更换锥管和浮子；可用软管或金属管连接。 Glass rotor flowmeter is a variable area flowmeter. It is a field-indicating instrument for detecting the instantaneous flow of liquid or gas in closed pipelines with a diameter of less than 100mm. It is suitable for the measurement and adjustment of small flows; The cone tube and float can be easily replaced under the bottom; can be connected with a hose or a metal tube. The float material is agate or 0cr18Ni12Mo2Ti. Among them, the nominal diameter of 2mm can be used to measure and control very small flows, and it is widely used in chemical, petroleum, pharmaceutical, food and national defense research departments.
Second, the measuring principle The main measuring element of the glass rotor flowmeter is a vertically mounted lower and upper conical glass tube and a float that can move up and down inside. When the fluid passes through the conical glass tube from the bottom to the top, a pressure difference occurs between the upper and lower parts of the float, and the float rises under the action of this differential pressure. When this rising force, the buoyancy and viscous lift force of the float are equal to the gravity of the float, the float is in an equilibrium position. Therefore, there is a certain proportional relationship between the flow rate of the fluid flowing through the glass rotor flowmeter and the rising height of the float, that is, the flow area of the glass rotor flowmeter.
主要用于化工、石油、轻工、医药、化肥、化纤、食品、染料、环保及科学研究等各个部门中，用来测量单相非脉动(液体或气体)流体的流量。 Glass rotor flowmeter is mainly used in chemical, petroleum, light industry, medicine, fertilizer, chemical fiber, food, dyes, environmental protection and scientific research and other departments to measure the single-phase non-pulsating (liquid or gas) fluid flow. Anti-corrosive glass rotor flowmeter is mainly used to detect the flow of corrosive liquids and gaseous media, such as strong acids (except hydrofluoric acid), strong bases, oxidants, strong oxidizing acids, organic solvents and other corrosive gases or liquids Flow detection of media.
Third, the technical parameters
Nominal caliber: DN3 ～ DN100
Accuracy grade: ± 4% ～ ± 1.5%
Measuring cone material: hard glass
Float material: stainless steel, agate, fluoroplastic, 316, etc.
Connection method: hose, flange, quick connector, etc.
Medium temperature: 0 ～ 120 ℃
Nominal pressure: 0.4Mpa ～ 0.9 Mpa
Range ratio: 1:10, 1: 5
Installation and use instructions:
How to choose glass rotor flowmeter correctly Glass rotor flowmeter is a kind of instantaneous flow measuring instrument which is simple to use, convenient to read and very versatile. In the field of environmental protection equipment and instruments, the amount is more than 30,000 units / year. Therefore, it is extremely important to choose and use this instrument.
Variety and selection:
根据它的用途和适应范围可分为：普通型、带筋维管型，微小流量及小外形型、耐腐型、实验室型、保温型、报警型和耐高压型八个系列。 The glass rotor flowmeter can be divided into eight types: ordinary type, ribbed vascular type, micro flow and small outline type, corrosion resistance, laboratory type, thermal insulation type, alarm type and high pressure resistance type according to its use and applicable range. series. According to the national series of instrument series spectrum, no matter which series includes a maximum of 12 calibers from 1mm to 100mm, the measurable flow range is: liquid (water) 0.1ml / min ～ 40m3 / hour, gas (Air) 1ml / min ~ 1000m3 / hour. The glass rotor flowmeter used for environmental protection instruments generally has a diameter of no more than 10 mm, and the measured flow belongs to a small flow range.