The piston type multi-function pump control valve is an intelligent valve which is installed at the pump outlet of the large-caliber water supply network system to prevent media backflow, water hammer and water hammer phenomenon. The valve has three functions of electric valve, check valve and water hammer eliminator, which can effectively improve the safety and reliability of water supply system. The double chamber and double disc structure can make the valve quickly close 90% after stopping the pump (to prevent the backflow medium from causing the pump to reverse), and the remaining 10% after slowly closing (to eliminate the destructive water hammer) The piston valve has reliable performance, high strength and stable action to prevent the opening of the pump water hammer and the stopping of the pump water hammer. Just operate the pump motor opening and closing button, the valve can be automatically opened and closed according to the pump operating rules, with large flow and small pressure loss.

Typical installation diagram