Gambaran Produk
Venturi Nozzle (Venturi Nozzle)
Bentuk penampang venturi nozzle simetris terhadap sumbu, terdiri dari bagian penyempitan berprofil bulat, leher silinder (throat), dan bagian pelebaran. Muka hulunya sama dengan nozzle ISA 1932. Leher terdiri dari bagian E sepanjang 0.3d seperti pada nozzle ISA 1932 dan bagian E′ sepanjang 0.4d ~ 0.45d.
Diameter leher d adalah rata-rata dari minimal 4 pengukuran diameter yang tersebar pada sudut hampir sama dalam bidang aksial. Leher harus silindris, dan diameter pada penampang mana pun tidak boleh menyimpang lebih dari 0.05% dari diameter rata-rata. Bagian pelebaran disambungkan ke bagian E leher tanpa pembulatan, tetapi burr dihilangkan.
Sudut apit bagian pelebaran Φ adalah 30° atau kurang, dan venturi nozzle dapat dipotong (truncate) dengan cara yang sama seperti venturi tube klasik.
English description
The profile of the Venturi nozzle is axisymmetric. It consists of a convergent section, with a rounded profile, a cylindrical throat and a divergent. The upstream face is identical with that of an ISA 1932 nozzle. The Throat consists of a part E of length 0.3d which is the same as for the ISA 1932 nozzle and a part E' of a length 0.4d to 0.45d. The value d of the diameter of the throat shall be taken as the mean of measurements of at least four diameters distributed in axial planes and at approximately equal angles to each other. The throat shall be cylindrical. No diameter of any cross-section shall differ by more than 0.05% from the value of the mean diameter. This requirement is considered as satisfied when the deviations in the length of any of the measured diameters comply with the said requirement in respect of deviation from the mean. The divergent section shall be connected with the part E of the throat without a rounded part, but any burrs shall be removed. The included angle of the divergent section, Φ, shall be less than or equal to 30°. The Venturi nozzle may be truncated in the same way as the classical venturi tube.
