Name: Foshan EMFM series sulfuric acid electromagnetic flowmeter
Brand: Guangzhou Dichuan Instrument Co., Ltd
Availability: InStock

4th Floor, East Building, Hengxing Industrial Park, No. 125 Qianfeng South Road, Shiji Town, Panyu District, Guangzhou City

EMFMseriesSulfuric acid flowmeterIt can display fluid flow rate and output pulses, simulate current and other signals for flow control and regulation, such as water, sewage, mud, pulp, various acid, alkali, salt solutions, food slurries, etc. Utilizing constant current low-frequency ternary rectangular waves or dual frequency rectangular waves for excitation, which combines the advantages of rectangular wave magnetic fields,Two electrodes are fixed on the measuring tube through the wall in the direction of the pipe diameter. The electrode tip is basically flush with the inner surface of the lining. When the excitation coil is magnetized by bidirectional square wave pulses, a working magnetic field converter with a magnetic flux density of B will be generated in the direction perpendicular to the axis of the measuring tube to amplify and process the flow signal，Sulfuric acid flowmeterWidely used in industries such as petroleum, chemical, metallurgical, textile, food, pharmaceutical, papermaking, as well as in fields such as environmental protection, municipal management, and water conservancy construction.

Foshan EMFM series sulfuric acid electromagnetic flowmeter

Product features:
Series nominal diameter DN10~DN5000. There are multiple options for sensor lining and electrode materials;
Measurement is not affected by changes in fluid density, viscosity, temperature, pressure, and conductivity;
The converter adopts a novel excitation method, with low power consumption, stable zero point, and high accuracy. The flow range can reach 1502:1;
There are no obstructing flow components or pressure loss inside the measuring tube, and the requirements for straight pipe sections are relatively low;
The converter can be integrated or separated from the sensor;
The converter adopts a 16 bit high-performance microprocessor, 2x16 LCD display, convenient parameter setting, and reliable programming;
The flowmeter is a bidirectional measurement system, equipped with three integrators and multiple outputs: current, pulse, digital communication, etc HART；

Main technical data:
Technical data of the whole machine and sensors

Execution standards	JB／T 9248—1999
Nominal Diameter	15、 20. 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400, 2600, 2800, 3000
Zui high flow rate	15m／s
accuracy	DNl5～DN600	Indication: ± 0.2999% (flow rate ≥ 0.01m/s); ± 3mm/s (flow rate<0.01m/s)
	DN700—DN3000	± 0.04999% of the indicated value (flow rate ≥ 0.08m/S); ± 4mm/s (flow rate<0.0799m/s)
Fluid conductivity	≥5uS／cm
nominal pressure	4.0MPa	1.6MPa	1.0MPa	0.6MPa	6.3、 10MPa
	DNl5～DN150	DNl5～DN600	DN200～DN1000	DN700～DN3000	Special Orders
ambient temperature	sensor	—25℃—60 ℃
	Converter and integrated model	—10℃—60 ℃
Lining material	Polytetrafluoroethylene, chloroprene rubber, polyurethane, perfluoroalkoxy (F46), mesh PFA
Zui high fluid temperature	—body type	70℃
	separated	Polychloroprene rubber lining	80℃120 ℃ (specify when ordering)
		Polyurethane lining	80℃
		PTFE lining	100℃150 ℃ (specify when ordering)
		Perfluoroethylene propylene (F46)
		Mesh PFA
Signal electrode and ground electrode materials	Stainless steel 0Crl8Nil2M02Ti, Hastelloy C, Hastelloy B, titanium, tantalum, platinum/iridium alloy, stainless steel coated with tungsten carbide
Electrode gua knife mechanism	DN300—DN3000
Connecting flange material	carbon steel
Grounding flange material	Stainless steel 1Cr18Ni9Ti
Imported protective flange materials	DN65—DNl50		Stainless steel 1Cr18Ni9Ti
	DN200～DNl600		Carbon steel and stainless steel 1Cr18Ni9Ti
Shell protection	DNl5DN3000 separable rubber or polyurethane lined sensor			IP65Or IP68
	Other sensors, body type flow meters, and separate converters			IP65
Distance (separated type)	The distance between the converter and the sensor is generally not more than 100m

Foshan EMFM series sulfuric acid electromagnetic flowmeter
Converter technology data

power supply

exchange

85—265V， 45—400Hz

direct-current

11—40V

Operation keys and display

Touch-tone

4A thin film button can be used to set and select all parameters, and the converter can also be programmed using a PC (RS232);

3LCD with wide viewing angle, wide temperature range, and backlit display;

The first line displays the traffic value;

The second line displays the flow unit;

The third line displays the percentage of traffic, total forward, total reverse, total difference, alarm, and flow rate.

Magnetic key type

2A magnetic key is used to display parameter selection and reset, and a PC (RS232) is used to program the converter settings;

2LCD with wide viewing angle, wide temperature range, and backlit display:

Line 1: Magnetic key selection: Display flow percentage, forward total amount, reverse total amount, difference total amount, alarm, flow rate.

Line 2: Display traffic.

Internal integrator

Positive total, negative total, and differential total.

output signal

Unidirectional analog output

Fully isolated, load ≤ 600D. (at 20mA);

Upper limit: 0-21mA optional, 1mA per level;

Lower limit: 0-21mA optional, 1mA per level;

Programming for forward and reverse flow output modes.

Bidirectional analog output

The lower limit is. Or 4mA, other same unidirectional analog outputs.

Bidirectional pulse output

Two outputs correspond to forward and reverse flow rates, with a frequency range of 0-800Hz and an upper limit of 1-800Hz to choose from. Each IHz level is available;

Square wave or selected pulse width, with an upper limit of 2.5S and 1ms per level;

Passive isolation transistor switch output, capable of absorbing 250mA current and withstanding 35V voltage.

Dual channel alarm output

Programmable alarm for high/low flow rate, air traffic control, fault status, positive/negative flow rate, analog over range, pulse over range, pulse small signal cutoff, with optional output polarity;

Transistor switch output with isolation protection, capable of absorbing 250mA current and withstanding 35V voltage (not isolated from pulse output)

digital communication

RS232， RS485，HART

Selection of lining

Lining material	Performance	Zui high medium temperature		scope of application
Lining material	Performance	—body type	separated
Polytetrafluoroethylene (F4)	It is a plastic with the most stable chemical properties, capable of withstanding boiling hydrochloric acid, sulfuric acid, nitric acid, and aqua regia, as well as concentrated alkali and various organic solvents. Not resistant to corrosion from chlorine fluoride, high-temperature chlorine fluoride, high flow rate liquid fluorine, liquid oxygen, and self oxygen.	70℃	100℃150℃ (Special order required)	1Strong corrosive media such as concentrated acid and alkali. 2. Sanitary media.
Perfluoroethylene propylene (F46)	Same as F4, its wear resistance and negative pressure resistance are higher than F4.		ditto
Polyfluoroethylene (Fs)	The upper limit of applicable temperature is lower than that of polytetrafluoroethylene, but the cost is also lower.		80℃
neoprene	1Has excellent elasticity, high tensile strength, and good wear resistance. 2. Resistant to corrosion in general low concentration acid, alkali, and salt media, but not resistant to corrosion in oxidizing media.		80℃120℃ (Special order required)	Water, sewage, and weakly abrasive slurry.
polyurethane	1Extremely strong wear resistance. 2Poor corrosion resistance.		80℃	Neutral strong abrasion slurry, coal slurry, mud

Selection of imported protective flanges and grounding flanges (or grounding rings)

Orchid species	Scope of application
Grounding flange (or grounding ring)	Suitable for non-conductive pipelines such as plastic pipes, but sensors with grounding electrodes do not require them.
Import protection flange	Choose when the medium has strong wear resistance.

Selection of electrodes

Electrode material	Corrosion resistance and wear resistance
Stainless steel 0Crl8Nil2M02Ti	Used for weakly corrosive media such as industrial water, domestic water, sewage, etc., suitable for industrial sectors such as petroleum, chemical, steel, as well as municipal and environmental protection fields.
Hastelloy B	It has good corrosion resistance to all concentrations of hydrochloric acid below boiling point, as well as to non chlorinated acids, bases, and non oxidizing salt solutions such as sulfuric acid, phosphoric acid, fluoric acid, and organic acids.
Hastelloy C	Can withstand corrosion from non oxidizing acids such as nitric acid, mixed acids, or mixed media of chromic acid and sulfuric acid, as well as corrosion from oxidizing salts such as Fe, Cu, or other oxidants such as hypochlorite solutions above room temperature and seawater
titanium	Capable of withstanding corrosion from seawater, various chlorides and hypochlorites, oxidizing acids (including fuming sulfuric acid), organic acids, and alkalis. Not resistant to the corrosion of relatively pure reducing acids (such as sulfuric acid, hydrochloric acid), but if the acid contains oxidants (such as nitric acid, Fc++, Cu++), the corrosion is greatly reduced.
tantalum	It has excellent corrosion resistance and is very similar to glass. Except for fluoric acid, fuming sulfuric acid, and alkali, it can almost withstand corrosion from cutting chemical media (including boiling point hydrochloric acid, nitric acid, and sulfuric acid below 50 ℃). Dig in alkali; Corrosion resistance.
Platinum/titanium alloy	Almost capable of cutting chemical media, but not suitable for aqua regia and ammonium salts.
Stainless steel coated with tungsten carbide	Used for non corrosive and highly abrasive media.
Note: Due to the wide variety of media and the complex factors such as temperature, concentration, and flow rate that affect their corrosiveness, this table is for reference only. Users should make their own choices based on the actual situation, and if necessary, conduct corrosion resistance tests on the selected materials, such as hanging plate tests.

EMFMseriesSulfuric acid flowmeterinstrument selection
Range confirmation
General industrial useSulfuric acid flowmeterThe flow velocity of the measured medium should be between 2-4m/s. In special circumstances, the low flow velocity should not be less than 0.2m/s, and the maximum flow velocity should not exceed 8m/s. If the medium contains solid particles, the commonly used flow rate should be less than 3m/s to prevent excessive friction between the lining and the electrode; For viscous fluids, the flow velocity can be chosen to be greater than 2m/s. A higher flow velocity helps to automatically eliminate the effect of viscous substances attached to the electrode, which is beneficial for improving measurement accuracy.
Under the condition that the range Q has been determined, the size of the flowmeter diameter D can be determined based on the range of flow velocity V mentioned above, and its value can be calculated by the following formula:
Q=πD2V/4
Q: Flow rate (㎡/h) D: Inner diameter of pipeline V: Flow rate (m/h)
Sulfuric acid flowmeterThe range Q of the flow meter should be greater than the expected large flow rate value, while the normal flow rate value should be slightly greater than 50 of the full scale of the flow meter.
EMFM seriesSulfuric acid flowmeterReference flow range

Caliber mm	Flow range m3/h	Caliber mm	Flow range m3/h
φ15	0.060~6.360	φ450	57.230～5722.650
φ20	0.110～11.30	φ500	70.650～7065.00
φ25	0.180～17.660	φ600	101.740～10173.60
φ40	0.450～45.220	φ700	138.470～13847.40
φ50	0.710～70.650	φ800	180.860～18086.40
φ65	1.190～119.40	φ900	228.910～22890.60
φ80	1.810～180.860	φ1000	406.9400～40694.40
φ100	2.830～282.600	φ1200	553.900～55389.60
φ150	6.360～635.850	φ1600	723.460～72345.60
φ200	11.300～1130.40	φ1800	915.620～91562.40
φ250	17.660～176.25.0	φ2000	1130.40～113040.00
φ300	25.430～2543.400	φ2200	1367.780～136778.40
φ350	34.620～3461.850	φ2400	1627.780～162777.60
φ400	45.220～4521.60	φ2600	1910.380～191037.60

EMFMseriesSulfuric acid flowmeterSelection spectrum

model	caliber
EMFM	10~2600
		code	Installation form
		Y	Integrated
		F	split type
			code	Converter model
			ZA	rotundity
			ZB	square
				code	output signal
				I.4	4~20mA
				f	Frequency 1KHz
				Rs	Serial communication (485)
				C	control output
					code	Explosion proof requirements
					N	No explosion-proof
					EX	Explosion proof (only applicable to split type)
						code	medium temperature
						T1	≤65℃
						T2	≤120℃
						T3	≤180℃(Only applicable to split type)
							code	Lining material
							NE	Chloroprene rubber (≤ 65 ℃)
							PTFE	Polytetrafluoroethylene (≤ 189 ℃)
							PVC	Polyvinyl chloride (≤ 70 ℃)
								code	Electrode material
								316L	stainless steel
								HC	Hastelloy C
								HB	Hastelloy B
								Ti	titanium
								Ta	tantalum

Guangzhou, ShenzhenZhuhai, Shantou, Foshan, Shaoguan, Zhanjiang, Zhaoqing, Jiangmen, Maoming, Huizhou, Meizhou, Shanwei, Heyuan, Yangjiang, Qingyuan, Dongguan, Zhongshan, Chaozhou, Jieyang, Yunfu

Guangzhou City: Yuexiu District Liwan District Haizhu District Tianhe District Baiyun District Huangpu district PANYU Huadu Luogang District, Nansha District Zengcheng City Conghua