Desıgn Features Nozzle Check Valves are one of the best check valve designs in terms of their features. Fast response to ﬂow changes. Very short closing movement. Low weight moving parts. The dynamic design of the internal parts and the spring selected according to the pump characteristics enable the check valve to react quickly to ﬂow changes. The most important beneﬁts of nozzle check valves; Are their trouble-free, long operating life. Moving parts are not exposed to shock impacts and other mechanical effects. There are no rubber-based parts subject to wear. Features metal-to-metal sealing design.