Starting from the initial position, the operator pushes the valve into the working area of the hydraulic press. After selecting the type from the control panel, the machine closes the safety door and presses the product with a predefined force. The seat design allows manual rotation under pressure using a lever. In the rear position, the pressing head inserts a special seal into the valve housing. At the end of the assembly, the operator rotates the seat back to the starting position, releases the press, and pushes the product forward to the testing station.