Product features of metal rotor flowmeters

Thread Content

A metal rotor flowmeter is a type of variable-area flowmeter; within a vertical conical tube that widens from bottom to top, the gravity of a float with a circular cross-section is counteracted by the fluid dynamics, allowing the float to rise and fall freely inside the cone. It moves up and down under the influence of flow velocity and buoyancy; once equilibrium is reached with the weight of the float, the flow rate is transmitted to the dial through magnetic coupling. They are generally divided into glass and metal rotameters. Metal rotameters are the most commonly used in industry. For small-diameter pipelines carrying corrosive media, glass materials are often employed; however, due to the fragility of glass, rotameters with rotors made of expensive metals such as titanium are also used at key control points. Product features: ▲Single-axis sensitivity indication, reliable operation, low maintenance requirements, and long service life. ▲Low requirements for straight pipe sections. ▲Wide flow ratio of 10:1; special ratio of 20:1. ▲Suitable for measuring the flow rate of media with small diameters and low flow velocities. ▲LCD display that shows both instantaneous and cumulative flow rates, with backlight option. ▲Non-contact magnetic coupling for transmission. ▲All-metal construction, suitable for high-temperature, high-pressure, and highly corrosive media; can be used in flammable and explosive hazardous environments. ▲Optional power supply options: two-wire system, battery, or AC power. ▲Multiple parameter calibration functions, along with data recovery, data backup, and power loss protection features. Technical parameters: ▲Measurement range: Water – 1 to 200,000 L/h (at 20°C) ； Air: 0.03–6000 m3/h (at 20°C, 0.1013 MPa); special flow rates can be customized. ▲Range ratio: 10:1 for standard models, 20:1 for special models. ▲Accuracy: Class 1.5 for standard models, Class 1.0 for special models. ▲Pressure rating: Standard models: DN15–DN50, up to 4.0 MPa ； DN80～DN200≤1.6MPa ； ▲High-pressure type: DN15～DN50≤32MPa ； DN80～DN200, ≤16MPa. ▲ Pressure rating of the jacket: 1.6MPa; for special models, consultation with the factory is required prior to selection and ordering. ▲ Pressure loss: 7KPa～70KPa. ▲ Medium temperature: Standard model: -40℃～+100℃ ； PTFE: -50℃～100℃ (frequent temperature changes are not allowed) ▲High-temperature type: 110℃～450℃ ▲Medium viscosity: DN15: η＜5mPa·s (F15.1～F15.3), η＜30mPa·s (F15.4～F15.8) ▲DN25: η＜250mPa·s ； DN50～DN200: η＜300mPa·s▲Ambient temperature: Remote type: -40℃～+85℃ (the liquid crystal will not be damaged; it functions properly at -30℃～+80℃)▲Local pointer type: -40℃～+100℃▲Connection type: Standard type: DIN2501 standard flange ； Special types: Any standard flange or thread specified by the user ▲ Cable interface: For explosion-proof types, it is 1/2NPT internal thread; for others, it is M20×1.5 internal thread ▲ Power supply: Standard type: 24VDC, two-wire system, 4–20mA (12VDC–32VDC) ▲ Alarm type: 24VDC, four-wire system, 4–20mA (18VDC–28VDC) ▲ AC type: 85–265VAC, 50Hz ▲ Battery type: 3.6V 7.5AH lithium battery, capable of continuous use for three years