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Gas turbine flowmeter-SN57

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Product introduction

SN57 series gas turbine flowmeter draw on the advanced concept of aviation technology and integrate the theory of fluid mechanics, electromagnetism and so on. It is a new generation of gas precision measuring instrument with high precision and high reliability, which integrates temperature, pressure, flow sensor and intelligent flow integrator.
When the inflow flow rate is timed, the flow is rectified and accelerated under the action of a special integrated rectifier for the air inlet. Since the turbine blade is at a certain Angle to the flow direction of the fluid, the turbine generates a rotational moment. After overcoming the friction moment and fluid resistance moment, the turbine starts to rotate. Within a certain flow range, the angular velocity of turbine rotation is proportional to the fluid volume flow.
According to the principle of electromagnetic induction, the use of magnetic sensor signal from coaxial rotation during induction out with fluid volume flow is proportional to the pulse signal, the signal after amplification, filtering, plastic with temperature and pressure sensor signal into micro processing unit of intelligent flow totalizer.especially for processing, and the volume of a gas flow rate and total directly display on the LCD screen.

Main Feature Main Technical Parameters Common Range Table Precision Range Table Size Specification Dielectric Strength Selection Table

- wide range: according to different specifications, the highest range can reach 1:226.
- High quality aluminum alloy turbine, with higher steady flow and corrosion resistance
- Imported special bearings, long service life
- The measuring room is isolated from the ventilation room to ensure the safety of the instrument
- can detect the temperature, pressure and flow of the measured gas, can automatically track and compensate the flow, and display the gas volume accumulation under the standard state (Pb= 101.325kPa,Tb=293.15K); Can query real- time temperature and pressure values
- Wide flow range (Qmax/Qmin ≥20:1), good repeatability, high accuracy (up to 1.0 level), small pressure loss, low starting flow, up to 0.6m3/h
- Multi-point nonlinear correction of intelligent instrument coefficient
- Built-in pressure and temperature sensor, high safety performance, compact structure, beautiful appearance
- meters with explosion-proof and protective functions, explosion-proof mark for Exd DEL BT4, Exia, CT4, protection grade for IP65
- The system works with low power consumption, and a 3.6V10Ah lithium battery can be used continuously for more than 1 year
- Adopt new microprocessor and high performance integrated chip, high precision, powerful function, superior performance.
- adopts the world class new technology of micro power consumption, low power consumption of the whole machine. It can be operated by internal battery for a long time, and can be operated by external power supply.
- The company can use linear correction technology, can be up to ten segments of linear correction. It can greatly provide the calculation precision of the instrument.
- The head of the flowmeter can be rotated by 350 degrees to facilitate on-site viewing of data.
- high accuracy, generally up to ± 1.5%, high accuracy up to ± 1.0%
- good repeatability, short-term repeatability can reach 0.05%r ~ 0.2%r, it is because of good repeatability, is the first choice of flow meter in trade settlement.
- According to user requirements, GPRS network gas turbine flowmeter can be provided, you can choose the built-in
GPRS or external GPRS signal acquisition box. Realize low cost, long distance wireless data transmission, can realize remote meter reading, remote monitoring of flow meter status, battery.

Meter diameter

General: 50mm、80mm、100mm、150mm、200mm
Precision: 25mm、50mm、80mm、100mm、150mm、200mm、250mm、300mm

nominal pressure

1.6Mpa, 2.5Mpa, 4.0Mpa, 6.3Mpa (higher than this pressure can be customized)

compensation way

Double temperature and pressure compensation

output signal

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

communication
protocol

MODBUS-RTU. HART (customize)

power supply

1、External 24VDC DC power supply.
Battery powered, 3.6 lithium battery.

service conditions

Medium temperature: -2(TC-80°C Ambient temperature: -30°C-60°C Relative humidity: 5%-90%
Atmospheric pressure: 86kPa-106kPa

Protection grade

IP65、IP67

anti-hazard
classification

ExdIICT6Gb

applicable medium

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

turn down

1 : 10-1: 20

precision

1.0、1.5

texture

General type: aluminum alloy. Precision type: caliber M200: aluminum alloy; Diameter 250, 300:
stainless steel

product standard

GB_T 21391-2008

installation direction

horizontal installation

caliber

Flow range m³/h

caliber

Flow range m³/h

precisi

DN25

5-70 (Type selection: L1)

DN150

50-1000 (Type selection: L5)

1.0%
1.5%

DN50

(Type selection: L2)

DN200

100-2000(Type selection: L6)

DN80

(Type selection: L3)

DN250

200-4000(Type selection: L7)

DN100

32-650(Selection: L4)

DN300

300-6000(Type selection: L8)

caliber

Flow range m³/h

caliber

Flow range m³/h

precision

DN25

2-20 (model selection：
M1)

DN150

50-1000 (model selection ：M9)

5-70 (model selection：

80-1600 (model selection：

DN50

6-100 (model selection：

DN200

80-1600 (model selection：

1.0%
1.5%

10-160 (model selection：

125-2500 (model selection：

DN80

13-250 (model selection：

DN250

125-2500 (model selection：

20-400 (model selection：

200-4000 (model selection：

DN100

20-400 (model selection：

DN300

200-4000 (model selection：

32-650 (model selection：
M8)

320-6500 (model selection：
M16)

Diameter mm	L	B	H	K	n	d	inch	Conventional pressure MPa
25	200	115	236	85	4	φ 14	M12 ×50	4.0
40	200	150	266	110	4	φ 18	M16 ×55
50	200	165	285	125	4	φ 18	M16 ×60
65	240	185	300	145	4	φ 18	M16 ×65	1.6
80	240	200	319	160	8	φ 18	M16 ×70
100	300	220	337	180	8	φ 18	M16 ×80
150	450	285	395	240	8	φ22	M20 ×80
200	500	340	448	295	12	φ22	M20 ×90
250	500	403	495	355	12	φ26	M24 ×90
300	500	460	548	410	12	φ26	M24 × 100

connection type

inside nominal diameter

Conventional
pressure rating

Special pressure rating

Flange type

stainless steel materials

DN25~ DN100

1.6MPA

Below 6.3 MPA

DN150、DN200

Below 4.0 MPA

DN250、DN300

Below 2.5 MPA

Cast aluminium

DN25~DN150

----

Threaded connection
type

stainless steel materials

DN25、DN40、DN50

Below 4.0 MPA

SN57-

specification

SN57-

SN57 series gas turbine flowmeter

ordinary type

PD-SO

Type A: Square LCD display

Type B: circular liquid crystal display

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)

Refer to the range table to select the appropriate range,
e.g. L1 (Common)

Refer to the range table to select the appropriate range,
e.g. M1 (precision type)

4-20 ma output

pulse output

RS485 output

Equivalent pulse output +RS485 output

MODBUS-RTU（ customization ）

HART（ customization ）

Pressure resistance: 4bar, selection B4

Pressure resistance: 7bar, type B7

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.