Digital gas metering system using tri-stable and bi-stable solen

Digital valve

Digital valve assembly

Discharge conduits of steam generators and the like

Double louver damper

Drafting apparatus

Economy, angle-blade damper kit

Economy, angle-blade damper kit

Eductor-mixer system

Ejector assembly

Electric power modulated lead screw actuated dampers and...

Electromagnetic valve

Electromagnetic valve assembly

Electronic valve for flow regulation on a cooking burner

Exhaust gas control valve, apparatus and method of...

Exhaust systems for motorized vehicles

External unified integral bleed system for valves

Fast acting high output valve

Faucet having proximity actuation control and hand control that

Flow cell