Multijet Water Meter (Class-A)
(Mechanical Driven) Class-A
Model : DMA
Salient Features
- Dry dial mechanical driven inferential type straight reading device, non-magnetic drive.
- Ensure wiper to keep the dial from frost for clear reading.
- Mature design careful selection of material for durability and high sensitivity.
- Size range from 15mm to 50mm.
Performance Data
| Size of The Meter | Maximum Recording Capacity in Kilo Litres | Minimum Reading Quantity in Litres | Hydrostatic Test | Maximum Flow Rate in Qmax-Lts./Hr. | Nominal Flow Rate Qn- Lts./Hr. Class A | Transitional Flow Rate Qn. Lts./Hr. Class A | Metering Accuracy | Minimum starting flow Qmin-Lts./Hr. Class A | Permissible loading lites per day (8 hours) | Accuracy between
Qmax & QT | Accuracy between
QT & Qmin |
| mm | inches | ± 2% | ± 5% |
| 15 | ½ | 9999.999 | 0.1 | 2.0 MPa | 3000 | 1500 | 150 | ±2% | 60 | 24,000 |
| 20 | ¾ | 9999.999 | 0.1 | 2.0 Mpa | 5000 | 2500 | 250 | ±2% | 100 | 40,000 |
| 25 | 1 | 9999.999 | 1 | 2.0 Mpa | 7000 | 3500 | 350 | ±2% | 140 | 56,000 |
| 40 | 1½ | 99999.999 | 1 | 2.0 MPa | 20000 | 10000 | 1000 | ±2% | 400 | 1,60,000 |
| 50 | 2 | 99999.999 | 1 | 2.0 MPa | 30000 | 15000 | 1500 | ±2% | 600 | 2,40,000 | |
Dimensions
| Size of The Meter | Meter Connection Thread ISO 228/1 | Meter Connection Pipe ISO 7 / 1 | Length w/o Coupling in mm | Length with Coupling in ±5 mm | Overall width in mm | Overall height in mm |
| mm | inches |
| 15 | ½ | G¾ B | R½ | 165 | 250 | 85 | 132 |
| 20 | ¾ | G1 B | R¾ | 190 | 290 | 85 | 136 |
| 25 | 1 | G1¼ B | R1 | 260 | 380 | 85 | 138 |
| 40 | 1½ | G2 B | R1½ | 300 | 430 | 135 | 170 |
| 50 | 2 | G2½ B | R2 | 330 | 470 | 135 | 170 |
Working Condition:
- Water Temperature 500C
- Water Pressure 1MPa
- Pressure Loss <0.1 Pa
- Maximum Pressure-16 Bar
Accuracy
- From minimum flow rate (Qmin) inclusive to transitional flow rate (Qt), exclusive: ±5%
- From transitional flow rate (Qt) inclusive, to maximum flow rate, (Qmax), exclusive: ±2%
Multijet Water Meter (Class-A):
They are mechanical meters that use multiple jets of water to spin a turbine, which drives a meter that displays the volume of water that has passed through the meter. The multiple jets improve the accuracy of the meter, especially at low flow rates.
Multijet Water Meter (ClassA) internal components
- Class-A: This refers to the accuracy of the meter. Class-A meters are the most accurate type of multijet water meter, and they are required by some regulations for use in certain applications, such as billing purposes. They are able to achieve a high degree of accuracy over a wide range of flow rates.
- Applications: They are suitable for measuring clean water in applications with relatively low flow rates, such as residential and commercial buildings. They are not suitable for dirty water or high-flow applications, such as fire sprinkler systems or industrial processes.
Benefits:
- Accurate: Class-A meters are highly accurate, making them ideal for applications where precise water measurement is important.
- Reliable: They are well-established technology and have a proven track record of reliability.
- Relatively low-cost: They are generally less expensive than some other types of water meters, such as ultrasonic meters.
- Tamper-resistant: They are designed to be tamper-resistant, helping to ensure that water usage is accurately measured.
- Long lifespan: They can last for many years with proper maintenance.
Limitations:
- Not suitable for dirty water: Dirty water can damage the meter and compromise its accuracy.
- Not suitable for high-flow applications: They may not be able to accurately measure high flow rates.
- Less accurate at low flow rates: While they are generally accurate, they may be less accurate at very low flow rates.
Here are some additional things to consider:
- Size: The size of the meter is determined by the diameter of the pipe in which it will be installed. Common sizes for residential applications are ¾ inch and 1 inch.
- Material: The meter made of a material that is resistant to corrosion, such as brass or stainless steel.
- Warranty: The meter comes with a warranty from the manufacturer. We offer a warranty of 5 to 10 years.
