TLX Technologies has patented technology for a solenoid-powered gate valve that greatly improves performance in a variety of applications. The technology provides a continuous membrane gate valve with high contamination resistance and greater reliability in real-world applications with less than perfect alignment. Availability of multiple control methods allows this new technology to replace poppet, diaphragm and spool valves and provide superior reliability and flow control.
DEF Coolant System
Selective Catalytic Reduction (SCR) systems utilizing Diesel Exhaust Fluid (DEF) is an established system for control of NOx emissions in diesel engines. DEF systems have a freezing point of -11°C (12°F). To thaw the fluid, engine coolant is circulated to the reservoir. Most systems have utilized unreliable poppet, diaphragm or spool valves to regulate flow to the DEF heating element. These valves are susceptible to contamination and do not perform well when a low pressure drop is required.
A superior method of diesel engine fluid coolant system is using a solenoid-powered gate valve. The automated or “commanded” valve responds to a signal from electronic controls. The coolant valve has a sprung gate assembled with elastic materials to reduce friction forces as the gate moves from open to close. The sprung gate contains a continuous elastic band assembled with two gate members. There is an interference fit within the gate providing a complete seal. The elastic quality of the gate allows system pressure to provide the sealing force needed in a closed position.
