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Vortex flowmeter-SN58

PREV: Oval Gear Flow Meter-SN5A

Product introduction

SN58 series precession vortex flowmeter integrates the function of flow, temperature and pressure detection, and can automatically compensate the temperature, pressure and compression factor. It is an ideal instrument for gas metering in petroleum, chemical, electric power, metallurgy and other industries.
The flow profile of the flow sensor is similar to the profile of a Venturi tube (as shown in the figure). A group of spiral guide vanes is placed at the entrance side. When the fluid enters the flow sensor, the guide vanes force the fluid to produce intense eddy flow. When the fluid enters the diffusion section, the vortex flow is affected by the backflow and begins to rotate twice, forming the phenomenon of gyroscopic vortex precession. The precession frequency is proportional to the flow rate and is not affected by the physical properties and density of the fluid. If the second rotation precession frequency of the fluid is measured by the detection element, good linearity can be obtained in a wide flow range. The signal is amplified by the preamplifier, filtered, and transformed into pulse signals proportional to the flow rate, and then sent to the microprocessor for integration processing together with the temperature and pressure test signals. Finally, the measurement results (instantaneous flow, cumulative flow, temperature and pressure data) are displayed on the LCD screen.

Application Frame Body Plan Main Features Technique Data Range Table Dimension Figure Size Specification Selection Table

Widely used in petroleum, chemical, electric power, metallurgy, urban gas supply and other industries to measure a variety of gas flow, is the current oil and city gas transmission and distribution metering and trade metering of the first choice of products.

No mechanical moving parts, not easy to corrosion, stable and reliable, long life, long operation without special maintenance;
- Using 16-bit computer chip, high integration, small size, good performance, the machine function is strong;
u Intelligent flowmeter integrates flow probe, microprocessor, pressure and temperature sensor in one, adopts built-in combination, makes the structure more compact, can directly measure the flow rate, pressure and temperature of the fluid, and automatic real-time tracking compensation and compression factor correction;
- The dual detection technology can effectively improve the detection signal strength and suppress the interference caused by pipeline vibration.
- Adopts the domestic leading intelligent anti-seismic technology, effectively inhibits the interference signal caused by vibration and pressure fluctuation；
- Adopt Chinese dot matrix display screen, display number is many, the reading is intuitive and convenient, can directly display the volume flow under the working state, the volume flow under the standard state, the total volume, to and the medium pressure, temperature and other parameters；
- Using EEPROM technology, convenient parameter setting, can be permanently stored, and can save up to one year of historical data；
- converter can output frequency pulse, 4 ~ 20mA analog signal, and has RS485
- Interface, can be directly networked with microcomputer, transmission distance up to 1.0km；
- Multi-physical parameter alarm output, one of which can be selected by users；
- The head of the flowmeter can rotate 360 degrees, easy to install and use；
- with the company's FM data collector, can be through the Internet or telephone network for remote data transmission
- Pressure and temperature signal for sensor input mode, strong interchangeability；
- The whole machine has low power consumption and can be powered by internal battery or external power supply。

Meter diameter

15mm、20mm、25mm、32mm、40mm、50mm、65mm、
80mm、100mm、125mm、150mm、200mm

nominal pressure

1.6MPa、2.5MPa、4.0MPa

compensation

Double temperature and pressure compensation

output signal

Pulse, 4-20mA, RS485, IC card signal

communication protocol

Modbus-RTU, HART (custom made)

power supply

1. External 24VDC DC power supply.
2、Battery-powered, 3.6 lithium batteries.

service conditions

Medium temperature :-20 °C-80 °C Ambient temperature :-30 °C-60 °C Relative humidity :5%-90% Atmospheric
pressure :86kPa-106kPa

Protection
grade

IP65、IP67

anti-hazard
classification

Ex ia IIC T6 Ga

applicable medium

Natural gas, compressed air, nitrogen and other low flow rate gas

Range than

1 : 10-1 : 15

accuracy

1.0、1.5

Material

Aluminum Alloy/Stainless Steel

product standard

SY 6658-2006

installation direction

Install horizontally or vertically

Nominal diameter DN（ mm ）	range of flow (m3/ h)	working pressure （ MPa ）	accuracy class	repeatability
15	1.0-10	1.6 2.5 4.0 6.3	1.0 1.5	Less than the absolute value of the fundamental error limit 1/3
20	1.5-15
25	3.0-30
32	6.0～60
40	7.0～70
50	12～ 150
65	20～300
80	40～400
100	80～900
125	80-1000
150	150～ 1500
200	240～3600	1.6;2.5;4.0

nominal diameter DN(mm)	nominal pressure (MPa)	boundary dimension（ mm ）		The table body material		weight (kg)
		The length of the table A	altitude H	stainless steel	aluminium alloy
20	1.6/2.5/4.0	160	360	√	√	6
	6.3/10/16	160	365	√		8
25	1.6/2.5/4.0	180	367	√	√	7
	6.3/10/16	180	378	√		10
32	1.6/2.5/4.0	200	383	√	√	9
	6.3/10/16	200	402	√		12
40	1.6/2.5/4.0	230	383	√	√	9
	6.3/10/16	230	402	√		12
50	1.6/2.5/4.0	230	403	√		9
	6.3/10/16	230	421	√		14
65	1.6/2.5/4.0	285	421	√		11
	6.3/10/16	285	438	√		14
80	1.6	330	438	√	√	14
	2.5/4.0	330	438	√		18
	6.3/10/16	330	446	√		21
100	1.6	410	468	√	√	14
	2.5/4.0	410	475	√		18
	6.3/10/16	410	483	√		33
150	1.6	585	542	√	√	21
	2.5/4.0	585	549	√		52
	6.3/10/16	585	572	√		72
200	1.6	700	618	√	√	41
	2.5	700	626	√		117
	4.0	700	634	√		127

SN58-

specification

SN58-

SN58 series precession vortex flowmeter

ordinary type

flame-proof type

Economical stand-alone version: IC card gas control
(optional, see SN59 series for details)

Precision stand-alone version: IC card gas control
(optional, see SN59 series for details)

Precision network version: IC card gas control (optional,
see SN59 series for details)

Range: 1.0-10m³/H (corresponding pipeline: DN15)

Range: 1.5-15m³/H (corresponding pipeline: DN20)

Range: 3.0-30m³/H (corresponding pipeline: DN25)

Range: 6.0 ~ 60m³/H (corresponding pipeline: DN32)

Range: 7.0 ~ 70m³/H (corresponding pipeline: DN40)

Range: 12 ~ 150m³/H (corresponding pipeline: DN50)

Range: 20 ~ 300m³/H (corresponding pipeline: DN65)

Range: 40 ~ 400m³/H (corresponding pipeline: DN80)

Range: 80 ~ 900m³/H (corresponding pipeline: DN100)

Range: 80-1000m³/H (corresponding pipeline: DN125)

Range: 150 ~ 1500m³/H (corresponding pipeline: DN150)

Range: 240 ~ 3600m³/H (corresponding pipeline: DN200)

4-20 ma output

pulse output

RS485 output

Equivalent pulse output +RS485 output

MODBUS-RTU（ customization ）

HART（ customization ）

B16

Pressure resistance: 16bar, selection B16

B25

Pressure resistance: 25bar, type B25

B40

Pressure resistance: 40bar, type B40

B63

Pressure resistance: 63bar, type B63

B...

Custom compression

Accuracy: grade 1.0

Accuracy: Level 1.5

External 24VDC DC power supply

Battery powered, 3.6 lithium battery

* The selection table is only available for parameter selection, and the corresponding code is delivered.

Shanghai Kayuan Electronic
Technology Co., Ltd.

Shanghai Kayuan Electronic Technology Co., Ltd is an enterprise specializing in the production and R&D of industrial fluid sensors and controllers. Its main products include switches and sensors for flow, pressure, temperature, and liquid level. In 2008, our assembly plant was established in Shanghai, China, to produce the PAKU series of products. We adopt advanced technology and manufacturing processes across the board. With our professional design and production technology, comprehensive product lines, excellent quality, and sales network services, we can not only provide users with timely and professional technical support but also offer high - quality one - stop services. The company has set up various departments such as the purchasing department, R & D department, quality management department, finance department, sales department, after - sales department, general office, laboratory, archive room, calibration workshop, production workshop, inspection area, storage area, shipping area, and a tea break room, aiming to provide products of excellent quality and sincere services. We adhere to the customer - centric concept of creating value for customers. According to the industry needs of customers, we continuously update technology and optimize services, aiming to become a leader in the field of process automation. PAKU products are now widely used in different industries, including automation complete sets of equipment, petroleum equipment, chemical equipment, power equipment, welding equipment, steel equipment, metallurgical equipment, automobiles, and water treatment. We have served many customers at home and abroad, and our products are sold to countries such as Canada, the United States, Brazil, Indonesia, Vietnam, Thailand, and Russia. In the increasingly competitive global market in the future, PAKU will, as always, serve a wide range of domestic and foreign customers with excellent quality, reasonable and competitive prices, on - time delivery, and perfect after - sales service. We welcome extensive cooperation with OEM and ODM customers.