Precise Valve Fitting : Modifying Pit Opening for DN300 Valve

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In the video,Workers install a new high-pressure valve (DN300, PN16) into a concrete valve pit. During lowering, the valve gets stuck due to tight clearance with the pit opening. Using hammers and chisels, they carefully remove minor concrete protrusions to create sufficient space. The valve is then successfully lowered and aligned with pipeline flanges for secure connection. This adjustment follows standard engineering tolerances for critical infrastructure upgrades.