1. The viscous medium diaphragm pump can be used as the flowmeter principle of various substances such as liquid, vapor and steam flow

2. With the structure of Vespa flowmeter, the working pressure damage is small, the installation, disassembly and assembly are convenient, and the maintenance amount is small;

3. Flowmeter principle suitable for large pipeline and irregular pipeline;

4. The working pressure damage is small (compared with the orifice plate, only less than 5% of the orifice plate), which greatly reduces the driving force consumption, and the environmental protection and energy saving effect is significant.

5. Integrated structure, complete set of equipment;

6. When the pipe diameter is larger, the plug-in structure is used, and its advantages are more prominent;

7. Long term operation reliability is good, and the stability is ± 0.1%;

8. Multi main parameters intelligent transmission, full dynamic temperature and pressure automatic compensation. It will not be damaged by the working pressure and temperature change of viscous medium discharge

9. On site labeling, remote adaptation, convenient system software establishment and network access license.

10. Open digital platform, multi-functional serial door. Field structure, HART communication protocol

II

1. Measurement range ratio 20:1 key performance parameters

2. General pipe diameter: 8mm ~ 800b250m;

3. Measurement accuracy: ± 1.0%;

4. Repeated accuracy: ± 0.1%;

5. Pressure: 0 ～ 40MPa;

6. Operating temperature: - 100 ℃ ~ 800 ℃;

7. Available materials: gas, liquefied gas, smoke, gas, drinking water, water supply and drainage of heating furnace, water solution containing corrosion; saturated water vapor, saturated steam, etc

8. Reference specification: iso3966-197, JB / t5325-1991 and GB / t2624-2006

9. Interface mode: plug-in looper flange, plug-in bolt connection, pipeline looper flange, pipeline bolt connection

III

1. The viscous medium flowmeter is composed of a testing rod, a pressure tap and a guide rod. It is a hollow metal rod inserted into the pipeline along the diameter. There are two pairs of pressure taps in the direction of facing the fluidity of fluid mechanics. Its shape is close to the flute. A little more pressure tap on the upstream side measures the total pressure, which is connected with the total pressure pipe and leads out the mean total pressure P1. A pressure tap is opened at the management center of the downstream side, which is connected with the static pressure pipe and leads out the static pressure P2. Vespa uses the difference between total pressure and static pressure to measure water flow.