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1. How much does a set of DN150 vortex flowmeter cost?
The price of DN150 vortex flowmeter varies significantly, with the mainstream price range ranging from 2899 yuan to 20000 yuan. The specific price is determined by factors such as material, accuracy, protection level, explosion-proof requirements, communication function, and procurement batch.
1. Public quotation reference 1 Two product quotations from Qingdao Hesheng Zhiyuan Automation System Co., Ltd.:
(1) Special Equipment Supervision and Inspection Digital Vortex Flow Meter: The starting unit price for one set is 8620 yuan, the unit price for two sets is 3123 yuan, and the unit price for three or more sets is 2899 yuan;
;(2) Seismic vortex flowmeter: The starting unit price for one set is 7447 yuan, the unit price for two sets is 3958 yuan, and the unit price for three or more sets is 2922 yuan; 2. General configuration price range: The price range for domestic conventional DN50-DN200 vortex flowmeter is 4500-20000 yuan, and the price range for imported products is 8000-75000 yuan, covering DN150 specification products; 3. Special configuration markup rules: The price of high-temperature and explosion-proof products will increase by 30% -50% compared to conventional models; 4. Large scale customized quotation: The new DY150 vortex street flow brother bridge quantity meter (4-20mA output) requires a minimum of 100 units for batch, with a unit price range of 440-4400 yuan.
2. Working principle of vortex flowmeter
1. Placing a triangular vortex generator in the fluid will cause regular vortices to alternate on both sides of the vortex generator, which is called Karman vortex.
. These vortices are arranged i
2、 The vortex flowmeter measures the volumetric flow rate, standard state volumetric flow rate, or mass flow rate of gases, vapors, or liquids based on the K á rm á n Vortex Street principle, and can be integrated as a flow transmitter into automated positive osmosis control systems.
3、 Vortex flowmeter uses the principle of fluid oscillation to measure flow rate. When a fluid passes through a vortex flow transmitter, two alternating columns of vortices are generated behind the vortex generator, whose frequency is proportional to the average velocity of the fluid flowing through the vortex generator and the characteristic width of the vortex generator. The release frequency of a vortex can be expressed as: f=(v/d) * St, where f is the frequency (in Hz), v is the average velocity of the fluid (in m/s), d is the characteristic width of the vortex generator (in m), and St is the Strouhal number, which is usually a dimensionless value between 0.14 and 0.27.
4、 The Strouhal number St is a function of the Reynolds number Re, and within a specific range of Reynolds numbers, the value of St is approximately 0.2. In practical measurements, it should be ensured that the Reynolds number of the fluid is within this range, and the vortex frequency is proportional to the fluid velocity.
5、 By measuring the vortex frequency, the average velocity v of the fluid flowing through the vortex generator can be calculated, and the flow rate q can be obtained using the corresponding formula, where A is the cross-sectional area of the fluid flowing through the vortex generator.
3. Actual flow rate of vortex flowmeter
The f
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