1. product introduction

　　(TYGC)series is suitable for oil，chemical industry，metallurgy，heating power，spinning，papermaking ,etc. Be use of control: over-heating vapor,
saturation vapor, compressed air, ordinary air(oxygen, nitrogen, hydrogen, natural gas, coal gas ,etc),water and liquid (water, petrol , alcohol, benzene ,etc.)

2. characteristics

　　2.1 This series Flowmeter can accurately measure within wide flow range of gas, liquid and steam flow rate but not influenced by fluid physical properties at the same time.

　　2.2 It is not affected by temperature and pressure, have the advantages of not easy to block, not easy card. And resistance high temperature and high pressure, safe and explosion-proof. It is used to the bad environment.

　　2.3 No moving parts and no hole aperture design. Long service life.

　　2.4 Adopting micro power consumption of new and high technology, this batery with display type flowmeter can work more than two years with continuos electricity.

　　2.5 Temperature compensation and integrated design

　　2.6 Output current type of electrical isolation, Has the good common-mode interference suppression.

　　2.7 it is Also showed flow values and cumulative flow value, and don't have to take turns to switch

　　2.8 Using vibration probe, the effective elimination of the influence of external vibration.

3. The key technical indexes

　　4.1.When tested gas is vapor，often use quality flow as unit of measurement quality flow，as：t/h or Kg/h. because of vapor(overheating & saturated),density would be changed under different temp & press，so to ensure the flow range, see (8)

　　formula(8)

　　TIPS：ρ：density of vapor(kg/m3); ρ0：1.205kg/m3 ;Q：:quality flow of vapor(t/h)

　　4.2.For pressure loss， check the effect of pressure loss to craft pipeline，(Unit：Pa)：

　　Δp= CdρV2/2 formula(9)

　　Tips：

　　Ρ: density of medium under working condition(kg/m3)V: mean flow rate(m/s)

　　4.3.If tested medium is liquid, to avoid 为gasification and loss, shall make the press of pipeline as follow:

　　p≥2.7Δp+1.3p0 formula(10)

　　Tips：

　　Δp: pressure loss(Pa)

　　p0：saturated vapor pressure of liquid which under working temperature.(Pa absolute pressure)

　　Po: fluidic vapor pressure (Pa absolute pressure)

　　4.4.vortex street flow meter is not suitable for testing high viscosity liquid. if counted measurable lower limit flow is not suitable for designing, pls select and use other meter type..

　　4.5. If as the counted parameter, the two or more kinds of meter can be used, then use less caliber, cheaper.

　　Tips: as far as possible tested range during upper limit of about 1/2～2/3.

5. Model selection table of vortex street flow meter(JB/T9294-1999 standard)

   1.Model selection table of sensor
   Model selection for TYGC series vortex street meter