Prediction of test results to determine the hydraulic resistance coefficient of an axially symmetrical check valve

The urgency of the paper is determined by necessity to predict results tests for determining coefficient hydraulic resistance axially symmetrical check valve DN 100-600 with operating pressure up 20 MPa and temperature from plus 50C 3500C according TS 6981-254-08847871-07. This suggests reduce volume excluding intermediate samples valves (DN 100, DN125, 200, 300, 500, 600) situated in between type models 175, 400) replaced calculations programme module ANSYS CFX calculation complex ANSYS. are given. An estimate values offered recommendations its determination experimental characteristics was carried out region quadratic absence cavitation (the were done on water). comes at Reynolds numbers Re ≥ 2 × 104 nominal diameters ≤ 250. ReKB process drag flow capacity factors procedure described 7.2.3 GOST 55508-2013. These test 150, 400 TU 6981-254-08847871-07 can be used when developing acceptance programs set number tested design features versions 600), replacing testing calculation.