Selection of Glass Rotor Flowmeters | Model, Specifications, and Technical Parameters of LZB Glass Rotor Flowmeters

『Selection of glass rotor flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

1. Technical parameters of glass tube rotor flowmeter

Measurement range Water (20 ℃) 5-200000 l/h Air (0.1013MPa 20 ℃) 0.03-4000 m/h Range ratio 10:1 (special Henghe Hongshu type 20:1) Precision grade 1.5 (special type 1.0) Working pressure DN15~DN50 PN4.0MPa (special type 25MPa) DN 80~DN100 PN1.6MPa (special type 16MPa) Jacket pressure grade: 1.6MPa Medium temperature standard type -80 ℃~+220 ℃ High temperature type 300 ℃ PTFE lining type ≤ 85 ℃ Environmental temperature 40 ℃~+120 ℃ (electric remote transmission type ≤ 65 ℃) Medium viscosity DN15： ≤5mPa.s(H15.1～H15.3)≤30mPa.s(H15.4～H15.9)DN25： ≤250mPa.sDN50～DN150：≤300mPa.s LCD display instantaneous flow display numerical range: 0-50000 cumulative flow display numerical range: 0-999 output standard signal: two-wire 4-20mA pulse signal: minimum interval of 50ms alarm signal: relay alarm, contact capacity 1A @ 30VDC, 0.5A @ 125VAC or 0.25A @ 250VAC power supply standard type: 24VDC (10.8VDC-36VDC) AC type Paiqiao: 220VAC (85-265VAC) battery type: 3.6 @ 5.2AH lithium battery connection standard type: DIN2501 threaded connection type: DIN11851 or user specified electrical interface M20 × 1.

1, 1/2 "NPT overall height Standard type: 250mm (vertical installation)

2. Pressure loss of rotor flowmeter

The pressure loss of rotor flowmeter mainly depends on its structural design, rotor shape, and flow range, usually between a few kPa to tens of kPa, much lower than that of orifice plate and other throttling flowmeters The pressure loss range of rotor flow meters with different diameters and types varies significantly: • Small glass tube rotor flow meters (DN15-DN25): full range pressure loss of about 1.5-4 kPa • Metal tube rotor flow meters (DN50-DN10

0): full range pressure loss of about 5-25 kPa • High pressure or large diameter special models: maximum pressure loss can reach more than 50 kPa 2. Key influencing factors • Rotor shape: The streamlined design of elliptical rotors can significantly reduce pressure loss, which is more than 30% smaller than spherical rotors • Cone tube angle: The smaller the cone tube taper (usually 2-3 °), the lower the pressure loss but the measurement range becomes narrower • Medium viscosity: When measuring high viscosity fluids, the pressure loss will increase by 20-50% • Flow upper limit: Actual flow rate used The closer to full range, the greater the pressure loss Compared with other flow meters in terms of pressure loss • VS orifice flow meter: the pressure loss of the rotor flow meter is only 1/3-1/5 of that of the orifice plate (the typical pressure loss of the orifice plate is 20-100 kPa) • VS vortex flow meter: the pressure loss of the two is comparable, but the pressure loss of the vortex street is smaller at low flow rates • VS electromagnetic flow meter: the electromagnetic flow meter has almost no additional pressure loss (only pipeline friction loss). 4 Practical solution to reduce pressure loss • Reserve margin when selecting: Keep the normal operating flow within the range of 30-70% of the flowmeters range • Choose a model specifically designed for low pressure loss, such as the OPTISWRL 4200 series vortex flowmeter from Cologne • Regular maintenance: Keep the rotor active and flexible to avoid particle accumulation and increase pressure loss. 5 For pumping systems, it is recommended to control the flow meter pressure loss within 10% of the total system pressure loss; The self linked flow system should choose a model wi

Selection of Glass Rotor Flowmeters | Model, Specifications, and Technical Parameters of LZB Glass Rotor Flowmeters

1. Technical parameters of glass tube rotor flowmeter

2. Pressure loss of rotor flowmeter

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