Abstract: An improved fluid pick-up assembly for the control of the flow of fluids upwardly through a pick-up tube from a fluid reservoir is disclosed comprising, a slidable tubular gate, disposed over a hollow tube having fluid inlet voids therein for fluid flow from said reservoir to said hollow tube, said gate sliding upwardly or downwardly over said inlet voids in response to a fluid level within said reservoir. Provision is also made for said fluid pick-up assembly in combination with an ultrafiltration device.

Abstract: A portable ultrafiltration device is disclosed comprising a prefilter, pump, membrane filter cartridges, temperature sensors, pressure sensors, process interdiction and control means placed to detect temperature and pressure variations of a feed mixture being processed by the device, and means cooperating with said temperature and pressure means to interdict the operation of the device to prevent damage to the components.

Abstract: A portable ultrafiltration device is disclosed comprising a prefilter, pump, membrane filter cartridges, temperature sensors, pressure sensors, process interdiction and control means placed to detect temperature and pressure variations of a feed mixture being processed by the device, and means cooperating with said temperature and pressure means to interdict the operation of the device to prevent damage to the components. Provision is also made for an improved feed mixture pick-up tube comprising a sliding gate means for interdicting liquid pick-up from an oil/water feed mixture.