Abstract: A coil modulator apparatus for use in connection with heat transfer coil assemblies found in commercial heating and air conditioning units is used to limit the number of active tube sections in cooling coil assemblies. The two port modulator apparatus comprises an inner valve, having valve ports in the sides of the valve, that rotates within an outer housing having openings that correspond to those ports in the inner valve. Apertures in the outer housing connect with upstream and downstream tube sections in the bank of tubes. As the actuator arm of the coil assembly is rotated this rotates one of the valves changing the orientation of the outer and inner valve ports and so cutting off water flow in various tubes depending upon how far the actuator is moved.

Abstract: A coil modulator apparatus for use in connection with heat transfer coil assemblies found in commercial heating and air conditioning units is used to limit the number of active tube sections carrying fluid in cooling coil assemblies. The single port modulator apparatus comprises an inner valve with an inner and outer housing. The modulator has valve ports in the sides of the modulator. The inner valve rotates within the outer housing and the openings in the inner housing correspond to those ports in the outer valve. These openings connect with upstream or downstream tube sections in the bank of tubes and allow flow of fluid to be diverted. The actuator arm of the coil assembly rotates the inner valve thus changing the orientation of the outer and inner valve ports and so diverting fluid flow from various numbers of tubes depending upon how far the actuator is moved.

Abstract: A coil modulator apparatus for use in connection with heat transfer coil assemblies found in commercial heating and air conditioning units is used to divert passage of water flow in certain sections of each tube in the coil assembly. The coil modulator apparatus comprises an inner valve, having valve ports in the sides of the valve, that rotates within an outer housing. Apertures in the outer housing connect with each tube in the bank of tubes so that there is an aperture in the outer housing that connects with both the downstream tube section and the upstream tube section of each tube. A portion of the water that collects in the modulator then flows back out of the modulator and into each of the downstream sections of every tube in the coil assembly. Another portion of the water in the modulator is diverted from the bank of tubes so that it flows out of the bypass tube of the modulator and directly back to the return feed of the coil assembly unit.

Abstract: A coil modulator apparatus for use in connection with heat transfer coil assemblies found in commercial heating and air conditioning units is used to divert passage of water flow in certain sections of each tube in the coil assembly. The coil modulator apparatus comprises an inner valve, having valve ports in the sides of the valve, that rotates within an outer housing. Apertures in the outer housing connect with each tube in the bank of tubes so that there is an aperture in the outer housing that connects with both the downstream tube section and the upstream tube sections of each tube. A portion of the water that collects in the modulator then flows back out of the modulator and into each of the downstream sections of every tube in the coil assembly. Another portion of the water in the modulator is diverted from the bank of tubes so that it flows out of the bypass tube of the modulator and directly back to the return feed of the coil assembly unit.

Abstract: A coil modulator apparatus for use in connection with heat transfer coil assemblies found in commercial heating and air conditioning units is used to limit the number of active tube sections in cooling coil assemblies. The two port modulator apparatus comprises an inner valve, having valve ports in the sides of the valve, that rotates within an outer housing having openings that correspond to those ports in the inner valve. Apertures in the outer housing connect with upstream and downstream tube sections in the bank of tubes. As the actuator arm of the coil assembly is rotated this rotates one of the valves changing the orientation of the outer and inner valve ports and so cutting off water flow in various tubes depending upon how far the actuator is moved.