The Check Valve (OEM Part No. 3217980120) is a hydraulic spare part compatible with Epiroc underground mining equipment, including M4C, S10M, M2D, Boltec S, Simba E7C,M40S, Boomer XE3C, S7D, 235 Boltec, Boltec-MC, Boomer L2D, Boomer S2, BOOMER-M2C, Boomer MD, S1D and T1D models. Manufactured from steel alloy, it functions as a hydraulic flow direction control and backflow prevention component in the hydraulic system. The check valve allows fluid flow in the correct direction, prevents reverse flow, and helps maintain stable hydraulic pressure. Designed for demanding mining environments, this replacement hydraulic component provides reliable performance, excellent durability, and long service life for equipment maintenance and repair applications.