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Tianjin Xun'er Technology Co., Ltd
Gas waist wheel flowmeter
NegotiableUpdate on 06/10
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Overview
Category: Lumbar wheel flowmeter Applicable occasions: Widely used for urban gas and industrial gas flow measurement and detection, it is an ideal instrument for users to achieve high accuracy and high reliability measurement. With high accuracy and high reliability, it uses high-precision bearings and dynamic balancing technology to process the rotor, ensuring accurate and stable operation of the product; Wide range, the range of different specifications of flow meters is 40:1~260:1; The starting flow rate is low, with different specifications of flow meters having a starting flow rate of 0.06m; /h~0.1m /h. Small pressure loss, with pressure losses ranging from 0.1kPa-0.38kPa for flow meters of different specifications; Good universality, all specifications of flowmeter body components can use universal accessories; Multiple structural forms.
Product Details
Product Overview
Gas waist wheel flowmeter, also known as Roots flowmeter, is a volumetric flowmeter with high accuracy, high reliability, wide range, low starting flow rate and other characteristics. It is mainly suitable for measuring non corrosive gases such as natural gas, urban gas, propane, nitrogen, and industrial inert gases. This flowmeter is mainly used for gas commercial settlement in industries such as catering and hotels, gas metering in transmission and distribution pipelines, gas pressure regulating stations, industrial and civilian boilers, and can also be used as a standard flowmeter.
Product Features
Long service life, precision machining and balancing of rotors, high-strength surface treatment, non-destructive rotation, non-contact sealing, self-cleaning function, and good lubrication of bearings. The design and process ensure the long-term normal operation of the flowmeter;
High accuracy and reliability, using high-precision bearings and dynamic balancing technology to process the rotor, ensuring precise and stable operation of the product;
Wide range, the range of different specifications of flow meters is 40:1~260:1;
The starting flow rate is low, and the starting flow rate of different specifications of flow meters is 0.06m?/h~0.1m? /h；
Small pressure loss, with pressure losses ranging from 0.1kPa-0.38kPa for flow meters of different specifications;
Good universality, all specifications of flowmeter body components can use universal accessories;
Good interchangeability, attachments can be exchanged with table body components of the same specifications;
Multiple structural forms.
Technical specifications
| execution standard | Gas waist wheel flowmeter "(JB/T7385-2015) |
| Verification regulations | Gas volumetric flowmeter (JJG633-2005) |
| Applicable Medium | Non corrosive, medium low flow rate gas media such as natural gas, propane, butane, carbon dioxide, nitrogen, etc |
| Material and surface treatment process of instrument casing | 6065 aluminum alloy, anodized spray coating |
| Instrument rotor material | 6065 aluminum alloy |
| Applicable medium temperature | -25℃～+55℃ |
| atmospheric pressure | 86kPa to 106kPa |
| Applicable work pressure | Pn16 |
| Installation environment temperature | -20℃～+60℃ |
| Relative humidity of installation environment | 5%～95% |
| connection method | Flange docking type |
| Converter type | T series converter (temperature voltage compensation type) |
| accuracy class | Level 1.5, Level 1.0 |
| repetitiveness | Better than 0.15% |
| working power supply | Battery+DC 24V |
| signal output | See Table 5.3 for details |
| electrical interface | Copper nickel plated M12 * 1.5 (can fix wire diameter range of 5-8mm) |
| Explosion-proof rating | Ex ia Ⅱ C T4 Ga (intrinsic safety type) (certificate number: CE21.0122X) |
| Protection level | IP65 |
flow range
| Nominal diameter (mm) | Model | Range (m)3/h） | accuracy class*2 | Initial flow rate (m3/h） | Maximum pressure loss*1(kPa) |
| DN25 | LLQ-16 | 0.4-16 | 1 | 0.06 | 300 |
| LLQ-25 | 0.5-25 | 1 | 0.06 | 300 | |
| DN40 | LLQ-40 | 0.5-40 | 1 | 0.09 | 110 |
| LLQ-65 | 0.5-65 | 1 | 0.06 | 100 | |
| DN50 | LLQ-65 | 0.5-65 | 1 | 0.06 | 100 |
| LLQ-110 | 0.5-110 | 1 | 0.09 | 145 | |
| DN80 | LLQ-240 | 1.6-240 | 1 | 0.08 | 320 |
| DN100 | LLQ-240 | 1.6-240 | 1 | 0.08 | 350 |
*The maximum pressure loss refers to the measurement of atmospheric pressure air (density of 1.2kg/m) by the waist wheel flowmeter3）The pressure loss generated at the maximum flow rate.
*2 Accuracy: Level 1.5: Qt～Qmax± 1.5%, Qmin～Qt± 3%;
Level 1.0: Qt～Qmax± 1%, Qmin～Qt± 2%. 
