|
Item |
Functions |
Display |
LCD screen |
Display status of input water volume, surplus water volume, total volume, payment, closed, open, error, low battery, under attack |
Digital show |
maximum total water volume9999.9m3 |
|
Water supply control |
Auto closes the valve when water volume is little, and open when inserting new prepaid card. |
|
Auto control |
Low battery alarm |
Auto closes the valve when battery is low, prompt to change the battery. |
Hardware security |
Auto closes the valve when the pulse line is cut off, and alarm under attack, which must repaired by administrator. |
|
Anti magnetic attack |
Auto closes the valve when strong magnetic close to the meter, need inserting card to reopen the meter. |
|
Power off detection |
Detecting the circuit after power up to check normal or not. |
|
Waterproof |
Reading card as normal even the meter part is in water. |
|
Auto maintenance |
Automatic switch valve for discharge once a month. |
|
Water quota |
You can set a limit to use water. Unable to input water volume more than limit. |
|
Zero-crossing solution |
User information would feedback to the superior software for processing when the valve failure to close in zero-crossing. Extra water volume will be record. |
|
Working features |
Moisture-proof pulse line |
The pulse output is not affected by moisture, data will record as normal. |
Multi-application card |
The first inserting of card in a new water meter will write in Card No. User ID, Water Volume. A card would serve in a total of 4 set of cold water meter, hot water meter, heat meter and pure-water meter at the same time. |
|
Data Recovery |
When the meter is damaged, please insert the read-in card to collect user data and transfer data by inserting to a new meter. |
|
Initialization |
Remove all information in the meter by inserting Initialization card, and set the starting line of water meter. |
|
Control card |
When the meter break down, please insert control card to detect fault or to force the valve open. |
|
Card Reissue |
You can register a new card with original data if lost the user card. |
Model (DN) |
15D |
20D |
25D |
Overload Flow Qmax(m3/h) |
3 |
5 |
7 |
Normal Flow Qn(m3/h) |
1.5 |
2.5 |
3.5 |
Transitional Flow Qt(m3/h) |
0.12 |
0.2 |
0.28 |
Min.Flow Qmin(m3/h) |
0.03 |
0.05 |
0.07 |
Technical Standards |
ISO4064, GB/T778, JB/T8802, JJG686, CJ/T133 |
||
Valve Life |
≥5,000 times |
||
IC Card Life |
≥100,000 times |
||
Min.Reading |
0.0001 m3 |
||
Max.Reading |
99999 m3 |
||
Power Supply |
3.6V lithium battery, life≥6 years |
||
Security |
Unique Card/Meter |
||
IC Card Life |
≥ 100000 times |
||
Static Working Current(uA) |
≤6 |
||
Error Qmin to Qt |
≤±5% |
||
Error Qt to Qmax |
≤±2% |
||
Working Condition |
Indoor using, relative humidity ≤93%, Cold water Meter ≤40°C,Hot water meter≤90°C, Water quality conforms to the National tap water standard |
Johnson screen is a v-type wire welding filter element developed by Johnson Company in order to solve the problem of solid-liquid separation. The surface wire is connected together with the support rods by welding.
The platelike Johnson screen is one kind of Johnson screen and can be made into different shapes (Johnson Screen Sieve Plate, Johnson Screen Support Grid, Curved Platelike Johnson Screen, Circular Platelike Johnson Screen and so on). Its filtration mode is filtering from the outside to the inside and filtering from the inside to the outside
The minimum slot opening of platelike Johnson screen is 25 um (0.001 inch) and the maximum slot opening platelike Johnson screen is 25 millimeter (1 inch).
The common material is 304, 321, 316 L, 904 L duplex stainless steel 2205, duplex stainless steel 2507, monel alloy.etc.
It is widely used in many fields, such as petroleum refining and refining industry, water supply and sewage treatment, pulp and paper industry, mining and sand processing, construction industry, food filtration, nuclear power and so on.
Platelike Johnson Screen
Well Screen,Platelike Johnson Screen,Ss Platelike Johnson Screen,Stainless Steel Platelike Johnson Screen
Xinxiang Shengda Filtration Technique Co., Ltd. , https://www.filtrations.nl