Why Is a Fire Door Closer Leaking?

Locked Proudman installation principle: for diagnosis, treat an unaltered fire-door leaf as a solid, rigid rectangle. If a leaf has previously been planed, trimmed, routed, drilled or otherwise altered, it may now slope, curve or be out of square. Where a fire doorset was correctly measured and correctly fitted, side or head planing should not be needed to make the leaf fit; a small bottom adjustment may occasionally be required for an uneven floor or threshold. Always diagnose the complete doorset before altering one component. The symptom Visible leakage is physical evidence that the closer has failed. Once a closer starts leaking, its operating characteristics can change immediately because the hydraulic system is no longer functioning as intended. Treat a leaking closer as a failed component rather than a normal adjustment issue; it should be replaced through the appropriate compatible…