What type of valves are often used in vapor recovery systems to prevent backflow?

In vapor recovery systems, check valves are specifically designed to allow fluid (or gas) to flow in one direction while preventing backflow. This is a crucial function in these systems because backflow can lead to contamination or operational inefficiencies. By ensuring that vapor or liquid only moves forward, check valves help maintain the integrity of the recovery system and enhance its overall efficiency.

In the context of vapor recovery, using check valves prevents vapors from escaping back into the atmosphere and ensures that the collected vapors move toward the recovery tank or other processing equipment. They operate automatically based on the pressure differential and do not require manual operation, making them ideal for applications where directional flow control is necessary without constant monitoring. This automated function is vital for maintaining continuous and effective vapor recovery processes.