Flowmeter selection, detailed understanding of the working conditions on the spot and related data information is the main work of the whole process of selecting the table, can say that the more careful to grasp the working conditions on the spot, the more accurate the data presented in the work of selecting the table, the higher the success rate of selecting the table will be.Many flowmeter manufacturers order information forms by asking customers to show the following:
1. Name and type of substance to be measured
2 if it is a mixture of gases, show the composition of the mixture (volume percentage)
3. Flow category: large flow, common flow, minimum flow
4. Category of fluid pressure: maximum, common and minimum;
5. Category of fluid temperature: highest, common, least
6. Relative density of fluid: relative density of standard state
Fluid viscosity: dynamic viscosity or kinematic viscosity
8. If it is a wet vapor, the air humidity of the vapor
9. Normal standard: the nominal diameter, diameter of pipe, pipe material, installation of vortex street flowmeter pipe standards (choke a way: rolled tube, expanding tube and 90 ° bend, 2 floor plan with 90 ° bend, 2 floor plan is not the same as 90 ° bend, gate valve, T branch pipe, the pipe vibration condition (no vibration, slight vibration, obvious vibration), upstream and downstream piping length, length of middle and lower reaches of the pipe)
Installation method: horizontal, vertical upward flow, vertical downward flow, upward tilt, oblique release, viaduct installation, underground installation, indoor installation, outdoor installation with cover, outdoor installation without cover
11. Installation standards on the spot: general, inflammable and explosive, damp and cold, moisture-proof, anti-fouling, natural environment temperature
12. Flow characteristics: stationary flow, variable flow, pulsation flow, gas-liquid two-phase flow, gas-solid two-phase flow, liquid-solid two-phase flow, liquid-liquid two-phase flow, polyphase flow;
13. Fluid conditions: cleaning, stains, easy to crystallize, easy to contain adhesive
14. Methods for flowmeter operation: continuous, intermittent, single shift, quantitative analysis
15. Measurement method of the flowmeter: no compensation for temperature and pressure, compensation for temperature and pressure, free online compensation for temperature, online compensation for temperature and pressure, free online compensation for temperature and pressure;
16. Provisions on pressure damage: greater pressure damage
Measurement objectives: total output metrological verification, flow labeling, flow control
18. Output signal: monopulse, 4-20ma, communication, local display;
19. The construction mode of vortex flowmeter should be used: one-piece structure and separated structure
20. Vortex flowmeter and pipeline interface: flange connection, flange installation
Porcelain city of all flowmeters, small to a screw hole, large to the case and gear are using Germany Siemens CNC machining center to complete, completely get rid of the current domestic mechanical and manual mixing operation of the manufacturing process, elliptical gear manufacturing process will produce a milestone change.