JIS 10K daily standard flange lift check valve can also be referred to as spring check valve. There is a spring inside that can reset it. Due to the pressure of the medium at the inlet of the pipeline, the valve can be opened by overcoming the resistance of the spring. When the pressure of the medium at the inlet end is lower than that at the outlet end, the spring pushes the valve core towards the valve seat to close the valve, preventing the medium from flowing back and playing a check role.
JIS 10K flange spring check valve 
Its internal structure and swing check valve
The JIS 10K flange lift check valve can be installed vertically or horizontally due to the use of a spring-loaded valve core. Due to the influence of downward gravity on the horizontal installation of the internal valve stem, the force on the valve core is uneven during use. The main installation method is recommended to install it vertically.
JIS 10K Spring Check Valve Body Material: Stainless Steel SCS13, SCS14 Size: 40A-300A Design Standards: JIS B2071, ASME B16.34 Face to Face: JIS B2002 Flange Standards: JIS B2220 Inspection and Testing: JIS B2003