The Circulatic is a forced recirculation watertube
boiler that uses a drum as a steam seperator and a reservoir of
water to supply the coils. A recirculating pump draws the water
from the drum and forces it through a set of parallel connected
coils at the rate of 3 to 4 times the maximum steaming rate.
The water is then pushed through a steam lance and a series of baffles
in the drum where some of the water is flashed into steam and separated.
The dry steam is released and the water is recirculated through
the coils. The fuel and combustion air is controlled by a modulating
motor that responds to steam pressure. The feedwater is controlled
by a water level control system and modulating feedwater valve.
