The performance of vapor compression refrigeration system depends on the individual performance of its type, components and quantity of the refrigerant. In this regard the design of capillary tube used as an expansion device requires proper attention for better design, control and operation of the system. Many researchers have done works on straight capillary tube under homogeneous flow conditions for limited refrigerants without considering coiled effects, separated and non adiabatic conditions. The objective of this work is to estimate the performance of a coiled capillary tube under adiabatic and non-adiabatic, separated flow including metastable conditions. The effect of various design parameters such as tube diameter, coil diameter, subcooling on the flow rate of capillary tube was studied. The experimental results are validated with previous results from developed models & experimental observations and a good agreement was observed. 6 to 15% decrease in mass flow rate of R 410A is noticed in coiled capillary tubes over a range of coil diameters 40-120mm as compared to that of straight capillary tubes under similar operating conditions. The effects of the length of capillary tube on the mass flow rates were studied and it is noticed that there is only a marginal drop in mass flow rates about 1.5% and even smaller  beyond 1000 mm length.