Shuangda Hydraulic Machinery is one of the professional solenoid control check valve manufacturers and suppliers in China,Website:://.chinahydraulic-valve.com, welcome to buy cheap and low price solenoid check valve made in China from our factory. Usage and characteristic SW Solenoid control check valve is an electro-hydraulic controlled check valve which is composed by a solenoid directional valve connecting on the oil way of a hydraulic check valve. If there is no signal input to the solenoid directional valve, the oil of up cavity will be controlled by the check valve to stop flowing; if there is a signal input to the solenoid directional valve, the oil will not be under the control by the check valve and the oil can flow in a way but cannot flow reservedly.