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Type Selection Instructions for Micro Flow Metal Tube Rotor Flowmeter

File Name：Type Selection Instructions for Micro Flow Metal Tube Rotor Flowmeter
Add Time：2019-04-12 10:30:20
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、產(chǎn)品概述：">Productoverview:
。">ZW-LZZW series of micro flow of metal tube rotameter has the characteristics of strong, stable, reliable and wide application range, can be used for measuring gas and liquid.，經(jīng)得起極端的環(huán)境條件

。">All metal design to ensure its high pressure, high temperature stability, can withstand extreme environmental conditions.The position of the magnetic induction transmitted to an analog indicator displays the measured values.。">Without power.
、結(jié)構(gòu)和計量原理：">Two, the structure and principle of measurement:
1, structure:
ZW-LZZW series of micro flow of metal tube rotameter is mainly composed of three parts:
、指示器（智能型指示器

，就地指示器）；">A (Intelligent indicator, indicator, local indicator);
、浮子

；">B, float;
。">C, a conical measuring chamber.
、計量原理：">2, the principle of measurement:
，浮子便上升

，環(huán)隙面積就隨之增大，環(huán)隙處流體流速立即下降

，浮子上下端差壓降低

，作用于浮子的上升力亦隨著減少，直到上升力等于浸在流體中浮子重量時

，浮子便穩(wěn)定在某一高度

。">On the lower end of the measured medium from the measuring tube through a conical float generating differential pressure form the upward force, when the float on the lift is greater than immersion float in the fluid weight, the float will rise, annulus area increases, the annulus fluid velocity decreased immediately, float on the lower pressure reduced, to float up with the decrease in stress, until the lift is equal to the weight of the float when immersed in a fluid, the float will stabilize at a certain height.。">The float position that corresponds to the size of the measured medium flow.，在浮子隨介質(zhì)上下移動時，磁場隨浮子的移動而變化

。">A built-in magnet, the float with the medium moves up and down, with the movement of the float magnetic field changes.
、對于就地型，由就地指示器中的旋轉(zhuǎn)磁鋼與浮子內(nèi)磁鋼耦合

，而發(fā)生轉(zhuǎn)動

，同時帶動指針

，通過刻度盤指示出此時的流量大小。">A, for in situ, by rotary magnetic float and the local indicator in the inner magnetic coupling, rotate, and drives the pointer, through the dial indicates the size of the flow.
、對于智能型

，由智能型指示器中的一個固態(tài)磁傳感器將磁場的變化轉(zhuǎn)化成電信號，經(jīng)A/D變換

、微處理器

，D/A輸出，LCD液晶顯示

，來顯示出流量的大小及累積流量

。">B, the intelligent, by a solid state magnetic sensor intelligent indicator in the magnetic field will change into electrical signal output by A/D transform, D/A microprocessor, LCD liquid crystal display to show the size and cumulative flow flow.
Three, widely used:
，石油

、化工、發(fā)電

、制藥

、食品、水處理等

。">ZW-LZZW series of micro flow of metal tube rotameter is widely used in petroleum, chemical, power, pharmaceutical, food, water treatment, etc..，惡劣環(huán)境條件，及各種介質(zhì)條件的流量測量過程中

。">The complex, harsh environmental conditions, the flow measurement process and various medium conditions in.
、主要特點：">Fourth, the main features:
，堅固穩(wěn)定

，適合高溫高壓，強腐蝕性介質(zhì)

。">1, all metal structure, strong stability, suitable for high temperature and high pressure, strong corrosive medium.
、采用全隔離設(shè)計，原裝進口繼電器輸出

，保證動作可靠

。">2, using the isolation design, imported relay output, to ensure reliable operation.
，測量部分可采用不同的材質(zhì)來適應不同的介質(zhì)條件

。">3, in all sectors of the measurement of gas and liquid, the measuring part can be using different materials to adapt to various medium conditions.
、水平

、各種安裝方式更適合不同使用場合。">4, the vertical and horizontal installation, more suitable for different occasions.
、磁性耦合結(jié)構(gòu)確保數(shù)據(jù)傳輸

、信號更加穩(wěn)定

。">5, the magnetic coupling structure to ensure data transmission, more stable signal.
，可帶保溫或夾套設(shè)計

。">6, magnetic filter, with thermal insulation or jacket design.
、水平

、各種安裝方式更適合不同使用場合。">7, the vertical and horizontal installation, more suitable for different occasions.
、可用于易燃

、易爆危險場合。">8, can be used in flammable and explosive occasions.
、技術(shù)參數(shù)：">Five, technical parameters:
；空氣 (20℃ 101325Pa) (1.2～3400)L/h；">1. measuring range: water (20 C) (0.3 ~ 100) L/h; air (20 degrees 101325Pa) (1.2 ~ 3400) L/h;
；">2. range: 10:1;
3. accuracy level: 4
Maximum working pressure: 4. 2.5MPa (according to the need of increase)
5. medium temperature: -80 ~ +150 C
6. environment temperature: -25 ~ +65 C
7. connection: 1/4 "NPT thread or phi 6 (phi 8) sleeve connection / vertical connection according to the level of user requirements
8. limit alarm: 1~2 alarm switch (optional)
；安裝中心距：90mm；">9. dimensions: overall size: 110mm; installation center distance: 90mm;
、產(chǎn)品維護：">Sixth, product maintenance:
、在長期的使用過程當中，管道內(nèi)不可避免會有鐵磁性雜質(zhì)吸附在浮子上

，這樣會將浮子卡死或影響測量精度

，要時常對傳感器內(nèi)浮子進行清洗；如果安裝磁過濾器

，也要進行定期清洗

。">1, in the process of long-term use, the pipeline inevitably there will be ferromagnetic impurity adsorption on the float, it will float stuck or affect the measurement accuracy, from time to time to clean the sensor float; if the installation of magnetic filters should be cleaned regularly.

，儀表接線或拆卸殼體后

，要將螺釘旋緊，須***保證殼體的密封性

，防止雜質(zhì)

、水或其它物質(zhì)進入，同時還要保證儀表殼體的可靠接地

。">2, instrument indicator equipped with electronic components, instrument wiring or demolition of housing, to housing screws, must ensure sealing, prevent impurities, or other material into the water, and also to ensure reliable earthing of the meter casing.

、儀表安裝后，*********次使用時

，要注意：">3, instrument installation, on first use, should pay attention to:
，造成儀表的損壞，一定要緩慢地打開閥門

！">When the valve is opened to avoid the formation of pressure shock makes the float slamming limiting device, causing damage to the instrument, slowly open the valve!
，以***大程度的減小浮子的震蕩；為確保浮子的穩(wěn)定性

，可以在儀表的出口安裝一節(jié)流閥

。">The measurement of gas meter is equipped with gas damper, to minimize the shock; to ensure the stability of the float, a throttle valve can be installed in the instrument export.
，首先要保證儀表的接線正確后

，方可通電；對于危險場合

，須***選擇防爆型

，并按防爆要求進行安裝使用。">4, for the remote type instrument, we must first ensure that the instrument wiring correctly, keeps power; for dangerous situations, must choose the explosion-proof, and the installation and use of proof required by the.
、在安裝時應遵循以下步驟：">Seven, the installation should follow the following steps:
、儀表在安裝到工藝管道之前，應拆卸所有安裝并檢查有沒有運輸損壞

；">1, before installing the instrument to process piping, should remove all installed and checked for any transport damage;

、為防止在運輸途中,指示器中裝有固定指針的橡皮筋,接線前應打開指示器左蓋把它輕輕取走，不要指針位置變化

；">2, in order to prevent in transit, with a rubber band fixed pointer indicator, indicator should open the left cover it gently removed before connection, do not change the pointer position;

、打開指示器右蓋，電纜線穿過電纜引入裝置后

，按旋轉(zhuǎn)角變送器的接線圖接線后

，旋緊壓螺母，使電纜固定

，然后旋緊左右蓋的緊固螺釘

，使指示器防水防塵；">3, open the indicator of the right cover, cable through the cable introducing device, according to the wiring diagram wiring rotation transmitter, pressure screw nut, the cable is fixed, and then tighten the fastening screws around the cover, the indicator of waterproof and dustproof;

、儀表的上下游管道應與儀表的口徑相同,連接法蘭或螺紋應與儀表的法蘭和螺紋匹配

，儀表上游直管段長度應保證是儀表公稱口徑的5倍，下游直管段長度h2不少于250mm

；">4, upstream and downstream piping and instrument instrument should be the same caliber, flange or threaded connection should be matched with the flange and screw instrument, instrument upstream straight pipe length should be 5 times the nominal diameter of the instrument, the downstream straight pipe length not less than H2 250mm;

、由于儀表的測量機構(gòu)采用的是磁傳遞，所以為了保證浮子流量計的性能

，傳感器的安裝周圍至少100mm處

，不允許有鐵磁性物質(zhì)存在；">5, the instrument measuring mechanism is magnetic transfer, so in order to ensure the performance of rotameter installed around the sensor, at least 100mm, the existence of ferromagnetic material is not allowed;

、儀表安裝前,工藝管道應進行吹掃

，防止管道中滯留的鐵磁性物質(zhì)附著在儀表里，影響儀表的性能，甚至會損壞儀表.如果不可避免

，應在儀表的入口安裝磁過濾器

；">Before installation, 6 meter pipeline sweeping shall be carried out, to prevent the retention of ferromagnetic material in the pipeline is attached to the instrument, the instrument performance, or even damage the instrument. If unavoidable, should be installed at the entrance of the magnetic filter instrument;

，將會在浮子處產(chǎn)生壓降,并引起數(shù)據(jù)失真

。">7, the measurement of gas meter is calibrated in special pressure, if the gas meter in the outlet directly discharged into the atmosphere, will produce a pressure drop in the float, and lead to data distortion.

，以便能對所需流量值進行設(shè)定

，當浮子上維持標校壓力時

，氣體將在閥門處膨脹

；">If this is the working conditions, should install a valve in the instrument exports, so that the required flow value is set, when the float to maintain calibration pressure, gas expansion in valve;
，如果是垂直安裝形式

，應保證儀表的直度優(yōu)于1%

；如果是水平安裝形式應保證儀表的水平度優(yōu)于1%；">The installation form 8, instrument installation for vertical and horizontal installation, if it is installed in a vertical straight form, should ensure that the instrument is better than 1%; if the level of installation form should ensure that the level of less than 1% meters;

、安裝在管道中的儀表不應受到應力的作用

，儀表的出口和入口應有合適的管道支撐,可以使儀表處于***小應力狀態(tài)；">9, installed in the pipeline in the instrument should not be subject to stresses, the instrument should be a proper entrance and exit pipe support, can make the instrument in the minimum stress state;

、產(chǎn)品與計算機等相關(guān)聯(lián)進行標校等操作時

，須***在安全場所進行。">10, product and computer related to calibration and other operations, must be in a safe place.

、安裝注意事項：">Eight, installation notes:

、在安裝流量計之前,先將管道內(nèi)的贓物，焊按雜質(zhì)等噴吹干凈

，如果液體中含有固體雜質(zhì)

，應在閥門與直管段之間安裝相應的過濾器。">In 1, before the first installation flowmeter in the pipeline, dirt, impurities such as welding blowing clean, if the liquid contained solid impurities, should the corresponding filter is installed between the valve and the straight pipe.

、屏蔽和接地:為了保證系統(tǒng)的理想電磁兼容性能

，屏蔽和接地是非常重要,尤其是總線電纜，要使電纜盡可能連續(xù)地屏蔽

。">2, shielding and grounding system: in order to ensure ideal electromagnetic compatibility, shielding and grounding is very important, especially the bus cable, cable as far as possible to make continuous shielding.

、對于安全區(qū)，電纜要按照常規(guī)要求盡可能接地

。">3, the safety zone, according to the requirements of conventional cable grounding as much as possible.

、在危險場所，要確保在整個總線范圍內(nèi)安全場所與危險所有足夠的等電位匹配,這種情況下

，多重接地是很******的

。">4, in dangerous places, to ensure that the whole range of bus safe places and dangerous enough, all the potential, in this case, multiple ground is very superior.

、流量選擇表：">Nine, choose the flow table:

Decay path	Common path	measuring range		The maximum pressure loss
DN (mm)	DN (mm)	The air (m3/h)	Water (L/h)	The air (KPa)	Water (KPa)
Fifteen	Fifteen	0.05-0.5	1.6-16	Seven	Six point four
		0.07-0.7	2.5-25	Seven point one	Six point five
		0.11-1.1	4.0-40	Seven point two	Six point five
		0.18-1.8	6.0-60	Seven point three	Six point six
		0.28-2.8	10-100	Seven point five	Six point six
		0.40-4.0	16-160	Eight	Six point eight
		0.70-7.0	25-250	Ten point eight	Seven point two
		1.00-10	40-400	Ten	Eight point six
		1.60-16	60-600	Fourteen	Eleven point one
Twenty-five			80-800		Fourteen
	Twenty-five	3.00-30	100-1000	Seven point seven	Seven
		4.50-45	160-1600	Eight point eight	Eight
		7.00-70	250-2500	Twelve	Ten point eight
		11-110	400-4000	Nineteen	Fifteen point eight
Fifty			500-5000		Sixteen point two
	Fifty	18-180	600-6000	Eight point six	Eight point one
		25-250	1000-10000	Ten point four	Eleven
Eighty		40-400	1600-16000	Twelve point six	Seventeen
Eighty	Eighty	50-500	2000-20000	Fifteen point five	Six point three
One hundred	Eighty	75-750	2500-25000	Seventeen Point Two	Eight point one
One hundred	One hundred	100-1000	4000-40000		Nine point five
One hundred and twenty-five	One hundred	160-1600	6000-60000		Ten
One hundred and twenty-five	One hundred and twenty-five	250-2500	8000-80000		Sixteen
One hundred and fifty	One hundred and twenty-five		10000-100000		Twenty
One hundred and fifty		300-3000	12-120m3/h		Twenty
		400-4000	15-150m3/h		Twenty-five

Ten, selection table:

Specification code				Explain
The name of the factory	ZW			Zhongwei control
Instrument types		LZZW		The micro flow of metal tube flowmeter
structural style		A		In the next
		B		Progress under the
		C		Side measure
		D		The bottom side
		R		Right into the left out
		L		The left into the right
		K		Clamp connection (sanitary polishing tube)
		W		Threaded connection
Size code		- XXX		DN15 said: 15 cases
The measuring tube material		R1		，304">1Cr18Ni9Ti, 304
		R0		，316">0cr18Ni12M02Ti, 316
		RL		316L
		RP		PTFE (PTFE)
		Ni		Hastelloy (Hastelloy C)
		Ti		TitHXium (Tai Hejin)
Media type		L		liquid
		G		Gas
working temperature		H1		- 40 -100 OC
		H2		- 80 -250 OC
Rated pressure		One point six		1.6MPa
		Four		4.0MPa
		Sixteen		16MPa
		Twenty-five		25MPa
Additional structure		O		nothing
		Z		Damping type
		T		Jacket
		H		High temperature type
		Y		High pressure type
Form indicator			M1	Local indication
			M2	Intelligent
			M3	Intelligent (explosion)
The output signal in the communication			N	nothing
			A	4-20mA
			H	4-20mA+Hart
Alarm controller			K1	The upper limit alarm
			K2	Alarm
			K12	The upper and lower limit alarm
Explosion proof type			E1	Intrinsically safe EXiaCT5 square casing
			E2	Flameproof shell EXiibt4 Park
Power supply			Zero	24VDC (optional)
			Two	220VAC
			Three	The 3.6 volt lithium battery

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