Introductions
This type water meter is a flow meter used to measure the total volume of water flowing through the tap water pipe, and can be equipped with remote transmission.WESDUN LXSG-15 Plastic shell threaded dry water meter is Dry type water meter;Cold water meter;DN15 water meter
Main Technical Parameters
| NominalDiameter | Q3/ Q1 | Q4 | Q3 | Q2 | Q1 | Min reading | Maxreading |
| mm | 80 | m3/h | m3 | ||||
| 15 | 3.125 | 2.5 | 0.05 | 0.03125 | 0.00005 | 99，999 | |
| 20 | 5 | 4 | 0.08 | 0.05 | 0.00005 | 99，999 | |
| 25 | 7.875 | 6.3 | 0.126 | 0.079 | 0.00005 | 99，999 | |
| 32 | 12.5 | 10 | 0.2 | 0.125 | 0.00005 | 99，999 | |
| 40 | 20 | 16 | 0.32 | 0.2 | 0.00005 | 99，999 | |
| 50 | 31.25 | 25 | 0.5 | 0.3125 | 0.00005 | 99，999 | |
| 15 | 100 | 3.125 | 2.5 | 0.04 | 0.025 | 0.00005 | 99，999 |
| 20 | 5 | 4 | 0.064 | 0.04 | 0.00005 | 99，999 | |
| 25 | 7.875 | 6.3 | 0.1 | 0.063 | 0.00005 | 99，999 | |
| 32 | 12.5 | 10 | 0.16 | 0.1 | 0.00005 | 99，999 | |
| 40 | 20 | 16 | 0.256 | 0.16 | 0.00005 | 99，999 | |
| 50 | 31.25 | 25 | 0.4 | 0.25 | 0.00005 | 99，999 | |
| NominalDiameter | LengthL1 | Length L | Width B | Height | Connection Thread | |
| (mm) | mm | D | d | |||
| 15 | 165 | 259 | 98 | 116 | G 3/4B | R 1/2 |
| 20 | 195 | 299 | 98 | 117 | G 1B | R 3/4 |
| 25 | 225 | 345 | 103.5 | 124 | G 1 1/4B | R1 |
| 32 | 230 | 354 | 103.5 | 124 | G 1 1/2B | R 1 1/4 |
| 40 | 245 | 373 | 125 | 162 | G 2B | R 1 1/2 |
| 50 | 300 | 446 | 125 | 162 | G 2 1/2B | R2 |
| 280 | 360 | 165(Flange outer diameter) | 187.5 | Flange Connection 4-M16 | ||
Features
- All the plastic raw material is 100% new material, not anysecond-hand material.
- High working pressure can afford PN16.
- Magnetic Drive, Lower transmission resistance.
- Magnetic shield, for external magnetic field protection.
- Sealed dry register ensures long time clear reading.-External regulating device.
- Accressories: 2pcs coupling, 2pcs coupling nuts and 2pcs washers.
Optional Features：
- Register Sealed type: Dry type.
- Accuracy: R=80 ; 100.
- Size: 15~50mm.
- Non return valve.
- Reed switch option.
- Thread end type: BSP /NPT.Working Conditions
- Water temperature:0.1℃~40℃ for cold water meter.
- Water pressure : ≤1.6Mpa ((16 bar).
Selection/ installation and Use
- Determine the type, metering characteristics and caliber of the water meter according to the working conditions of the water supply facility. Its expected flow rate should be compatible with the Q1 to Q3 flow rates of the water meter.
- Install the water meter as marked on its dial: “H” stands for horizontal installation, “V” stands for vertical installation, and the arrow on the meter body must align with the direction of water flow in the pipeline.
- Install plugs or stop valves upstream and downstream of the water meter, install straight pipe sections of sufficient length and the same diameter according to the requirements of U10, D5 (10DN, 5DN) to ensure accurate measurement.
- If necessary, install a filter between the upstream valve and the straight pipe section, and fit a check valve between the downstream straight pipe section and the valve.
- Protect the water meter from damage caused by impact and vibration at the installation site.
- Avoid excessive stress on the water meter caused by pipes and fittings. If necessary, mount the water meter on a base or bracket. Secure the upstream and downstream water pipes properly to prevent any displacement from water thrust when removing the meter or disconnecting either side.
- Leave sufficient length for water meter connections during pipe installation. When the distance between the two pipes exceeds the water meter length, adjust the pipe distance to match the connection length. If the distance is too small, forced installation will break or damage the water meter’s threaded ends, pipe joints, connection nuts or flanges. Do not install the water meter in this case. If the pipes at both ends are not aligned on the same axis, use other methods to align them to meet the water meter installation requirements. Otherwise, the same damage will occur. To compensate for installation length errors and simplify water meter disassembly and assembly, install an expansion joint of the corresponding caliber downstream of the water meter with Q3≥16m³/h.
- Flush the pipe before installation to prevent stones, sand and other debris from entering the water meter.
- Keep the water meter full of water to ensure long-term operation. Set the water outlet at least 0.5 meters higher than the water meter.
- Measures should be taken to prevent adverse hydraulic conditions (cavitation, surge, water hammer) from damaging the water meter.
- Protect the water meter from exposure and freezing. Take anti-freezing measures during cold weather. Shield water meters from damage caused by external corrosion.
- During long-term use, calibrate water meters periodically according to local requirements. If debris, rust or other sediments in the pipe block the water filter and affect accurate measurement, ask the designated department to recalibrate the meter. Users must not repair water meters without permission.
