Venturi meter tube flowmeters OEM manufacturer of gas liquid market better ..

BYM-JD classical Venturi tube Overview BYM-JD classical venturi tube is according to national standard GB / T2624-93 design and manufacturing, according to GB JJG640-94 verification. In the standard throttling device, to which it is required, the downstream straight pipe shortest permanent minimum pressure loss, stable performance and easy maintenance. Because accurate calculation, energy consumption, has been widely used in petroleum, chemical, electric power, metallurgy industries. Scope 1. nominal diameter: 50mm≤DN≤1200mm, exceeding 1200mm need calibration rough cast convergent section: 100mm≤DN≤800mm machining constriction: 50mm≤DN≤250mm crude iron welding contraction section: 200mm≤DN≤1200mm 2 The throttle aperture ratio β: 0.3≤β≤0.75 rough cast convergent section: 0.3≤β≤0.75 machining constriction: 0.4≤β≤0.75 crude iron welding contraction section: 0.4≤β≤0.7 3. Reynolds number range: 2 × 105≤ReD≤2 × 106 rough cast convergent section: 2 × 105≤ReD≤2 × 106 machining contraction section: 2 × 105≤ReD≤106 crude iron welding contraction section: 2 × 105≤ReD≤2 × 106 4. Accuracy: a structure in the form of classical Venturi tube axial section shown below. It is composed of a cylindrical inlet section A, conical contraction section B, a cylindrical throat C, E form a conical diffuser. A diameter of the cylindrical section D, which length is equal to D; conical convergent section B, and an angle of 21o ± 1o; C circular cylindrical throat section diameter d, a length equal to d; diffuser E conical, diffusion angle of 7o ~ 15o. Constriction classic Venturi tube in three forms: raw-cast constriction, contraction section machining, welding iron crude constriction. Classical venturi tube upstream of the mouth and throat take pressure taps made of several (at least four) separate wall taps form, with all the pressure rings to several separate connecting wall taps . When d≥33.3mm, taps throat diameter is 4 ~ 10mm, the diameter of the upper reaches of the taps should be less than 0.1D; when d≤33.3mm, throat pressure port diameter 0.1d ~ 0.13d upstream taps diameter of 0.1d ~ 0.1D. Specifications and description spectrum spectrum specification BYM-JD classic venturi tube liquid medium Y Z Q gas steam connection 1 2 welded flange connection flange made other nominal C Stainless steel S O 025 0.25MPa 06 0.6 MPa 10 1MPa ... ...... 160 16MPa constriction in the form of rough cast convergent section C E S rough machining constriction constriction welding iron nominal diameter of 50 DN50 65 D65 80 DN80 ... ...... 1200 DN1200