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technical article
Magnetic flap liquid level gauge (2)
2011-7-30 9:32:29

DXUHZ 磁翻板液位计 有关参数选用 Five, DXUHZ type magnetic flap level gauge selection
( 1) Anticorrosive materials ( Table 1)

Code
Name and scope of application  
聚氯乙烯 PVC
Water, sewage, slightly corrosive liquid
聚丙烯 PP polypropylene
Resistant to acids, alkalis, greases, oils and oils
聚乙烯 PE polyethylene
Resistance to enoic acid, alkali, alcohol, gasoline solvent
聚四氟乙烯 PTEE Teflon
Resistant to all chemicals
聚偏氟乙烯 PVDF polyvinylidene fluoride
Oil and grease resistance, acid and alkali solvents
聚氨脂 PUR polyurethane
Resistant to fuels, hot oils and oils
聚酰胺 PA polyamide
Oil and grease resistant

Stainless steel material comparison table

China
United States
Germany
Japan
1Cr18Ni9Ti
321
1.4783
SUS32
0Cr18Ni2Mo2Ti
316
1.4571
0Cr17Ni12Mo2
316
1.4401
SUS316L
0Cr17Ni14Mo2
316L
1.4435
SUS316
0Cr18Ni9
304
1.4301
SUS304

( 3) Comparison table of density of liquid medium and distance of sinker ( Table 3)

Density of liquid medium
Tube distance
Commonly used liquid media
0.45 ~ 0.60
450 ~ 600
Liquefied petroleum gas, liquid ammonia
0.61 ~ 0.74
300 ~ 500
Gasoline, butadiene
0.75 ~ 0.85
250 ~ 300
Methanol, light oil, xylene
0.86 ~ 0.99
220 ~ 250
Propanol, beer
1.00 ~ 1.10
200 ~ 220
Water, acetic acid
1.11 ~ 1.25
170 ~ 200
Hydrochloric acid, tar
1.26 ~ 1.39
160 ~ 170
20 %稀硫酸 Liquid alkali, 20 % dilute sulfuric acid
1.40 ~ 1.59
150 ~ 160
Liquid chlorine, chloroform, concentrated sulfuric acid
1.60 ~ 2.00
120 ~ 150
98 %硫酸 Fluorine oil, 98 % sulfuric acid


Selection example:
0.6MPa t=80 Measuring a bearing container, working pressure 0.6MPa ; t = 80    2000mm Measuring range: 2000mm . (0.8 比重 ) 要求耐腐蚀材质 (1Cr18Ni9Ti) ,平焊法兰。 The medium is light oil (0.8 specific gravity ) and requires a corrosion-resistant material (1Cr18Ni9Ti) . The flange is welded flat. With drain screw. ( 隔爆 ) 的输出 4 20mA Upper junction box type ( explosion-proof ) output 4-20mA . DXUHZ 50/C1 1GL-3D-2000-0.6-80 0.8 Side mount type: DXUHZ 50 / C1 1GL-3D-2000-0.6-80 0.8
DXUHZ 磁翻板液位计 结构与外形尺寸 Structure and Dimensions of DXUHZ Magnetic Flap Level Gauge
、基本型 2 、夹套型 1. Basic type 2. Jacket type
DXUHZ 磁翻板液位计 应用须知 Eight, DXUHZ magnetic flap liquid level gauge application notes
、侧装式液位与被测容器的上下分液管间最各装一只截止阀门以便打开或总装液位计,另一方面为维修液位带来方便。 1. A shut-off valve is installed between the side-mounted liquid level and the upper and lower liquid-dispensing pipes of the container to be opened or the liquid-level gauge is installed. On the other hand, it is convenient to maintain the liquid level. When the upper and lower cut-off valves are closed, the drain flange at the bottom of the level gauge can be opened or the drain screw can be removed, and the body of the level gauge can be cleaned by pouring water.
、安装液位计,法兰中心线垂直度 4‰ ,当液位计的测量范围大于 3 米时,需要考虑增加中间加固法兰 ( 或耳朵攀 ) 作固定支撑以增加强度。 2. Install the level gauge, the verticality of the flange center line is ‰ 4 ‰ . When the measuring range of the level gauge is greater than 3 meters, you need to consider adding an intermediate reinforcement flange ( or ear climbing ) as a fixed support to increase strength.
、配套远传液位计变送器与二次仪表之间连线的芯线截面面积应大于 0.8mm2 ,与交流电源同路平行铺设时,至少应保持 20 厘米以上的距离,最好单独穿铁管铺设,或用屏蔽二芯电缆铺设,屏蔽层只能一端接地。 3. The cross-sectional area of the core wire connecting the supporting remote transmission level gauge transmitter and the secondary instrument should be greater than 0.8mm2 . When laying in parallel with the AC power supply, it should maintain a distance of at least 20 cm or more, preferably separately. Lay through an iron pipe or use a shielded two-core cable. Only one end of the shield can be grounded.
、选用液位控制器,其触点容量,均以阻性负载设计如用非阻性或大功率负载则要用中间继电器转换。 4. The liquid level controller is selected, and its contact capacity is designed with a resistive load. If a non-resistive or high-power load is used, an intermediate relay must be used.
、对液体介质中含有悬浮杂质和亲磁物质的场合,不宜用本液位计 ( 因为这些杂质会对浮子组件造成卡阻 ) 5. Where the liquid medium contains suspended impurities and magnetophilic substances, this level gauge should not be used ( because these impurities will cause blockage of the float assembly )
、用户必须了解参数,该参数与介质密度有关,根据浮力原理,浮子组件的长度与介质密度有关,故在选用、设计时必须考虑不同的介质。 6. The user must understand the parameters. This parameter is related to the density of the medium. According to the principle of buoyancy, the length of the float component is related to the density of the medium. Therefore, different media must be considered when selecting and designing.
DXUHZ 磁翻板液位计 安装使用和维护 Nine, DXUHZ magnetic flap liquid level gauge installation use and maintenance
、液位计安装必须垂直,以保证浮球组件在主体管内能上下运动自如。 1. The level gauge must be installed vertically to ensure that the floating ball assembly can move up and down freely in the main tube.
、最好在容器与液位计之间装截止阀,以便清洗和检修液位计时切断物料。 2. It is better to install a shut-off valve between the container and the level gauge, in order to clean and repair the liquid level timer to cut off the material.
、液位计主体管周围不容许有导磁体靠近,否则直接影响液位计正常工作。 3 , no conductive magnets are allowed near the main tube of the level gauge, otherwise it will directly affect the normal operation of the level gauge.
、液位计安装完毕后,需要用磁钢进行校正,对翻柱导引一次使零位以下显示红色,零位以上显示白色。 4. After the level gauge is installed, it needs to be calibrated with magnetic steel. Guide the column once to display red below the zero position and white above the zero position.
、液位计投入运行时应先打开下引液管阀门让液体介质平稳进入主体管,避免液体介质带着浮球组件急速上升,而造成翻柱翻黑心失灵或乱翻 ( 若出现此现象待兴衰液面平稳后可用磁钢重新校正 ) 5. When the liquid level gauge is put into operation, the lower drainage tube valve should be opened first to allow the liquid medium to enter the main tube smoothly, to prevent the liquid medium from rising rapidly with the floating ball component, which will cause the turning of the column to fail, or to turn over ( if this occurs (After the rise and fall of the liquid surface is stable, it can be re-corrected with magnetic steel )
、因运输过程中为了不使浮球组件损坏,故出厂前将浮球组件取出小液位计主体管外。 6. In order not to damage the floating ball component during transportation, the floating ball component is taken out of the main tube of the small liquid level gauge before leaving the factory. After the level gauge is installed, open the bottom drain flange, and then reinstall the floating ball assembly into the main tube. Note that the heavy end of the floating ball assembly is facing up and cannot be installed upside down.
、根据介质情况,可定期打开排污法兰清洗主体管内沉淀物质。 7. According to the condition of the medium, the drain flange can be opened regularly to clean the sediment in the main pipe.