Product Introduction A modular square fixed disc filter comprises a body and an operation cabinet installed on the front surface of the body. The front surface of the body is fixed with two bottom support plates, and the operation cabinet is located at the top of the two bottom support plates. The surfaces on both sides of the operation cabinet are fixed with L-shaped side blocks, and the front surface of the body is symmetrically fixed with two side seats. One end of the side seat runs through a hanging hole, and the end of the L-shaped side block is inserted into the hanging hole; By setting up structures such as L-shaped side blocks, side seats, positioning blocks, internal shifting grooves, springs, internal shifting blocks, and limit rods, the installation of the operation cabinet is more convenient and fast, and the installation is also more stable, solving the problems of inconvenient installation and poor stability in the original installation. It also facilitates the d…