Vortex Flow Meter

PARAMETER	TYPICAL VALUE
Accuracy	±1.0% (Liquid), ±1.5% (Gas/Steam)
Repeatability	±0.2%
Turndown Ratio	10:1 to 20:1
Response Time	≤ 1 sec
Process Temperature	-40°C to +350°C
Output Signal	4–20 mA, Pulse, Frequency
Communication	HART / Modbus (RS485)

Key Features

No Moving Parts

Ensures minimal wear and tear, resulting in low maintenance and long service life.

High Accuracy & Stability

Provides reliable measurement with excellent repeatability and long-term stability.

Wide Measurement Range

Supports a high turndown ratio (up to 20:1) for various flow conditions.

Multi-Fluid Capability

Suitable for liquids, gases, and steam, making it highly versatile.

Unaffected by Fluid Properties

Performance is largely independent of density, pressure, and temperature variations.

High Temperature & Pressure Resistance

Operates efficiently in extreme industrial environments.

Digital Output & Communication

Supports 4–20 mA, Pulse, HART, and Modbus for easy system integration.

Robust Construction

Made with stainless steel body (SS304/SS316) for durability and corrosion resistance.

Low Pressure Drop

Optimized design ensures minimal energy loss in the pipeline.

Easy Installation & Commissioning

Available in flanged, wafer, and insertion types.

Optional Compensation

Supports temperature and pressure compensation for accurate mass flow measurement.

Working Principle

The vortex flow meter works on the Von Kármán vortex street, where a bluff body placed in the flow path generates vortices. The frequency of vortex shedding (f) is directly proportional to the fluid velocity (V):

f = St × V / d
Where:
f = vortex frequency
St = Strouhal number (constant)
V = fluid velocity
d = width of bluff body

Industrial Applications

Vortex flow meters are widely used in industries where reliable flow measurement of steam, gas, and clean liquids is required.

1. Power Plants

• Steam flow measurement in boilers and turbines
• Feed water and condensate monitoring
• Energy efficiency and heat balance calculations

2. Oil & Gas Industry

• Measurement of natural gas and compressed air
• Steam injection systems
• Refinery process flow monitoring

3. Chemical & Petrochemical Industry

• Flow measurement of process gases and liquids
• Utility lines (steam, nitrogen, air)
• Reactor feed and output monitoring

4. Food & Beverage Industry

• Steam flow in sterilization and cooking processes
• Clean liquid measurement (water, beverages)
• Utility monitoring for energy optimization

5. Pharmaceutical Industry

• Steam used in sterilization (SIP/CIP systems)
• Process gas monitoring
• Clean and hygienic flow applications

6. Water & Wastewater Treatment

• Flow measurement of treated water and chemicals
• Aeration systems (air flow monitoring)
• Pumping and distribution systems

7. HVAC & Building Services

• Chilled water and hot water flow measurement
• Steam and air flow in heating systems
• Energy management systems (EMS)

8. Pulp & Paper Industry

• Steam flow for drying processes
• Chemical flow monitoring
• Utility management

9. Textile Industry

• Steam usage in dyeing and drying processes
• Compressed air monitoring

10. General Industrial Utilities

• Compressed air systems
• Boiler efficiency monitoring
• Energy consumption tracking

Technical Specifications

PARAMETER	DETAILS
Measured Medium	Liquid, Gas, Steam
Medium Temp.	(-)40 ～＋250℃; (-)40 ～＋350℃ (High Temperature Type)
Pressure	Flange: DIN PN10/PN16/PN25/PN40, ANSI 150#/300% Wafer: 4.0 MPa Thread: 1.6 MPa Tri-clamp: 1.6 MPa Insertion: 1.6 MPa
Accuracy	±1.0% (Flange/Wafer/Thread/Tri-clamp) ±1.5% (Insertion Type)
Flow Range	Liquid: 0.4–7.0 m/s Gas: 4.0–60.0 m/s Steam: 5.0–70.0 m/s
Specifications	DN15–DN300 (Flange/Wafer Type) DN80–DN2000 (Insertion Type) DN15–DN100 (Thread/Sanitary Type)
Body Material	SS304 (Standard), SS316 (Optional)
Reynolds Number	2 × 10⁴ ~ 7 × 10⁶
Resistance Coefficient	Cd ≤ 2.6
Vibration Acceleration Allowed	≤ 0.2g
Protection Grade	IIG Exia IICT5 Ga
Ambient Temperature	(-)40℃ ~ 65℃ (Non Ex-proof) 20℃ ~ 55℃ (Ex-proof)
Relative Humidity	≤ 85%
Pressure (Atmospheric)	86–106 kPa
Power Supply	DC 12–30V or 3.6V Lithium Battery
Signal Output	4–20mA, Pulse 2-wire (HART), 4-wire (RS485)
Communication	RS485 Modbus or HART

Flow Range

Selection Of Caliber Of Vortex Flowmeter

Vortex flow sensor operating flow range table

Caliber (mm)	Liquid			Gas
Caliber (mm)	Range (m³/h)	Output Frequency (Hz)	Small Signal	Measurement Range (m³/h)	Output Frequency (Hz)	Small Signal
15	0.4~4	40~400	15	3.0~12	280~1200	100
20	0.8~8	33~330	10	6~30	230~1100	80
25	1.2~12	25~250	8	9~55	200~1200	70
32	2.0~20	20~200	6	12~120	120~1200	60
40	3.0~30	15~150	6	20~200	100~1000	50
50	5.0~50	13~130	5	30~300	80~800	40
65	8.0~80	9.7~97	4	50~500	60~600	30
80	12~120	7.7~77	3	80~800	50~500	25
100	20~200	6.7~67	2	120~1200	40~400	20
125	30~300	5.0~50	2	200~2000	35~350	20
150	40~400	3.8~38	1	300~3000	30~300	15
200	75~750	3.0~30	1	500~5000	20~200	10
250	110~1100	2.3~23	1	800~8000	16~160	5
300	160~1600	2.0~20	1	1100~11000	13~130	5
(300)	160~1500	5.5~87	2	1560~15600	85~880	45
(400)	180~3000	5.6~87	2	2700~27000	85~880	45
(500)	300~4500	5.6~88	2	4300~43000	85~880	45
(600)	450~6500	5.7~89	2	6100~61000	85~880	45
(800)	750~10000	5.7~88	2	11000~110000	85~880	45
(1000)	1200~17000	5.8~88	2	17000~170000	85~880	45

Model Selection Table

The Selection Table Of S S Flow Vortex Flowmeter.

Instrument Type	S S Flow Vortex Flowmeter
Nominal Diameter (mm)	015	DN15	125	DN125	601	DN600	202	DN2000
	020	DN20	151	DN150	701	DN700
	025	DN25	201	DN200	801	DN800
	032	DN32	251	DN250	901	DN900
	040	DN40	301	DN300	102	DN1000
	050	DN50	351	DN350	122	DN1200
	065	DN65	401	DN400	142	DN1400
	080	DN80	451	DN450	162	DN1600
	101	DN100	501	DN500	182	DN1800
Structure Type	F	Split Type			Y	Integral Type
Connection Mode	1	Flange connection
	2	Clamping flange connection
	3	Insert type
	4	Thread connection
	5	Clamp connection
Measurable Medium	L	Liquids
	G	Gases
	S	Saturated steam
	O	Superheated steam
Medium Rating Pressure (MPa)	16	Example: 1.6MPa represented as 16
Medium Maximum Temperature	L	150°C
	M	250°C
	H	350°C
	T	400°C
Power Supply	1	12~28VDC
	2	3.6V Lithium Battery (Live LCD display)
	3	85~265VAC (Remote display)
Output Signal	F	No display of pulse output
	D	Current output with display
	H	RS232/RS485/HART
Function Type	P	With pressure compensation
	T	With temperature compensation
	PT	With pressure & temperature compensation
Explosion-proof	A	No explosion proof
	B	Explosion-proof
	G	Flameproof

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