STAND FOR THE DYNAMIC CALIBRATION OF CAPILLARY TUBES AND SMALL DIAMETER CONDUITS IN NON-ADIABATIC CONDITIONS

摘要

The invention relates to a stand for the dynamic calibration of capillary tubes and small diameter conduits in non-adiabatic conditions, comprising two tanks (4, 18) for the working fluid, with the first tank (4) connected to an air compressor (1) and having two adjustable connecting systems (a, b) for the capillary tube or conduit to be calibrated, the air compressor (1) being connected to a buffer vessel (2) for compressed air, provided with an adjustable pressure switch. The capillary tube or the conduit (9) is provided with a heat insulation (5), a pressure gauge (6) and a thermometer (7). The tank (18) is connected to a distributor (24) provided with some interchangeable rotameters (26) for measuring the flow rate and it is provided with a manometer (19), a thermometer (20), an exhaust valve (21), a pressure intake port (22) through which the working fluid is conveyed to a distributor (28) provided with some differential manometers (30) for measuring the backpressure. Tanks (4, 18) are attached to a supporting and guiding system (31) provided with some guideways (33) and supporting rods (34). The capillary tube or the conduit (9) has the input and output connected by some flexible connections (11) to a heat exchanger (10) supplied with a heated or cooled thermal medium in a thermal treating plant (13), provided with a heating power unit (14) and a circulating pump (15).