Abstract: An algae and bacteria contamination preventing apparatus and subsystem including a conduit forming a flush-water flow path between a potable water supply and a connection to a feed water entry port of a watermaker system. A check-valve and flush-water connector is installed in the feed water entry conduit. The flush-water flow path includes a valve means for opening and closing the flow path, a filter/ion-generator component a controller for sensing flush-water flow in the flow path, and in response thereto, applying electrical power to an ion-generating element of the filter/ion-generator component. The filter/ion-generator component also includes a filter element which removes undesirable chemicals from the potable flush-water before the ion-generating element introduces copper and/or silver ions into the flush-water. The valve means may be manually operated or be controlled by a watermaker system shut down controller.

Abstract: A corrosion and contamination preventing apparatus and subsystem including a conduit forming a watermaker flush-water flow path between a potable water supply and a feed water entry portion of a watermaker system, a filter/ion-generator component disposed along the flush-water flow path, a valve means for opening and closing the flush-water flow path, and a controller for sensing flush-water flow in the flow path, and in response thereto applying electrical power to an ion-generating element of the filter/ion-generator component. The filter/ion-generator component also includes a filter which filters undesirable chemicals from the potable water before the ion-generating element introduces copper and/or silver ions into the flush-water. The valve means may be manually operated or be controlled by a watermaker system shut down controller.

Abstract: A reverse osmosis system is subject to long periods of non-use in which water stands inside. A hollow-cylindrical spiral-wound type reverse osmosis membrane is disposed inside a cylindrical pressure vessel. An electrostatic-field generator is disposed inside the pressure vessel. A high voltage direct current source powers the electrostatic-field generator and a voltage gradient is constantly produced inside the volume of the pressure vessel. Such gradients cut through the fabric of the reverse osmosis membrane layers. The voltage to the electrostatic-field generator is kept on at all times, and prevents biofouling, even during lay-up periods. Current flow through the electrostatic-field generator is insignificant because it acts as a high-Z capacitor.

Abstract: A self-containment for a gas cylinder comprising a coaxial annular wall welded to and around the top of the cylinder itself. A circular closure with an exhaust duct opening from it fits over the annular wall and is secured tightly to it with a seal ring between, by a releasable tension band.