Self-closing valves offer a practical, economical solution to fluid loss problems in applications requiring more frequent inspection of magnetic plugs or chip detectors. Available in threaded or bayonet designs, the valves close down automatically as the magnetic plug or chip detector is removed. This eliminates the loss of expensive lubricants and reduces the need to clean up after inspection. As a result, inspection is faster and more convenient for maintenance personnel.

Both types of self-closing valves offer maximum exposure of the magnet to the flow of lubricant or hydraulic fluid. The wide-open design is essential to proper functioning. If the free flow is restricted, ferrous chips and particles are less likely to come in contact with the magnet.

Self-closing valves are sealed with “O” rings, providing a positive seal under the low-pressure condition generally associated with their application. The “O” rings seal the valve when the plug is in position and when it is removed for inspection.