Keywords：Water injection valve, automatic water injection valve, automatic replenishment water injection valve

Description：Automatic water replenishment and injection valve is a new type of valve installed on the water replenishment pipeline of closed cycle heating or cooling systems. It was researched by Shanghai Anchao in 2002. The automatic water replenishment and injection valve can automatically maintain the system pressure at the set value, and the check valve inside the valve can prevent hot water from flowing back into the cold water pipeline of the heating system.