(4) Cherry-Burrell Spiratherm Coiled Tube Heat Exchangers. Spiral tube outer diameter: 5 in. Spiral tube inner diameter: 4 in. Shaft dimensions: 64 in. L x 3 in. dia. Inlets: (1) 1 in. dia. female ferrule for spiral tube, (1) 1-1/4 in. dia. FPT for refrigerant, (1) 1-1/2 in. dia. FPT. Outlets: (1) 1-1/4 in. dia. FPT for refrigerant, (1) 1 in. dia. female ferrule for spiral tube. Coiled tube heat exchangers have a single tube coiled inside a shell. Designed to operate at very high pressures with high heat transfer rates allows products to flow through the tube at high velocities which reduces fouling and increases run times. Typical applications include viscous products such as: BBQ sauce, slurries and puddings. Overall dimensions: 7-1/2 in. dia. x 6ft. 5 in. L.