Vapour-liquid equilibrium (VLE) data of the ternary mixture composed of difluoromethane (R32), propane (R290) and 1,1,1,2,3,3,3-heptafluoropropane (R227ea) have been measured for three compositions at temperatures between 269.85 and 328.35 K. The experimental method is a synthetic one with a variable volume cell. Our results about each of the three corresponding binary systems are compared to literature data using a Soave-Redlich-Kwong (SRK) equation of state with MHV1 mixing rules involving the NRTL model. (C) 2003 Elsevier B.V. All rights reserved.