The results of the experimental studies of the heat transfer process for baffled, jacketed stirred tank equipped with two turbine stirrers have been presented. The experiments were carried out for the tank of inner diameter D = 0.45 m, filled with fluid up to the height H = D; H = 1.25D; H = 1.5D and H = 1.9D (Fig. 1). Two stirrers: a standard disc turbine (Fig. 2) and a pitched blade turbine with the angle of the blade inclination beta = 45-degrees or beta = 135-degrees (Fig. 3) were mounted on the party shaft of the tank. Geometrical parameters of the stirrers were as follows: diameter d = 0.33D, number of blades Z = 6, the width of a blade b = 0.2d and the length of a blade a = 0.25 d (for the disc turbine). The distances between the bottom of the tank and lower and upper stirrers were equal to h1 = 0.33H and h2 = 0.67H, respectively. Therefore, the measurements were performed for nine configurations of two stirrers (Table 1). Additionally, each individual stirrer was also tested. The measurements were carried out for turbulent regime of the fluid flow. Newtonian fluid of viscosity of 2.5-3 cP (for mean temperature in the tank) was used. Experimental set-up is shown in Fig. 4. In total, 480 experimental data of the mean value of the heat transfer coefficient were obtained as the function of the stirrer speeds, geometrical parameter H/D and configuration of stirrers. Calculated from the experimental data, the value of the exponent A at Re number in Eq. (4) is equal to 0.67. The dependences Nu/(Pr0.33Vi0.14) = f(Re) are presented graphically for a stirred tank equipped with a single disc turbine (Fig. 5) and with two disc turbines (Fig. 6). The results of the measurements are approximated by dimensionless equation (Eq. (5)). Detailed forms of the function C(H/D) in Eq. (5) for each configuration of stirrers are presented in Table 2 and Fig. 7. Experimental studies have proved that the process of heat transfer is the most intensive if a slender stirred tank is equipped with two disc turbines.