... flow measuring instrument, which is mainly used in oil, chemical, medical industries.Technical parameters(i). Model number and nominal diameter Model numberLNV48LNV50LNV52LNV53LNV55LNV56Norminal diameter DN20DN20DN25 ... aluminum castReversible rotator(iii). Flow range unit: L/h specsNominal diameter(mm)kerosenelight oilheavy oilLNV50KB 2060-160030-200015-2000LNV52KB 25300-3000150 ...