Abstract: This invention relates generally to the fields of separation and conversion technologies, and more particularly to materials for use in tangential-flow filtration techniques. The tangential-flow materials are useful in a wide range of separation and conversion processes, including those reliant on reverse osmosis, microfiltration, ultrafiltration, or nanofiltration semipermeable filtration membranes, and provide efficient methods for purifying or producing various target substances, including biopolymer particles for use in tangential-flow filtration.

Abstract: A seal provides for the gastight separation of a cooling-gas side and an air side of a shaft, in particular a generator shaft, including an annular basic body having a sealing ring and an outlet for a sealing oil. The sealing oil forms an oil film in a radial gap between the sealing ring and the shaft. The sealing ring has segments made of a heat-resistant plastic or of a soft brass alloy which are disposed at the interior of the sealing ring facing the shaft. The plastic or soft brass alloy acts as an emergency lubricant in the event that the shaft comes into contact with the sealing ring. The segments are releasably fastened to the basic body, so that they can easily be exchanged. The basic body is preferably formed of two half-shell bodies.

Abstract: A method for inerting a generator in a power station includes flushing the generator in a rapid manner which is favorable in terms of power consumption and is simplified in terms of process technology. Cooling gas which is present in the working state for cooling in the generator is displaced through the use of an inert gas stored in gaseous form, in particular argon. A phase transition from, for example, a liquid to a gaseous inert gas, which prolongs the inerting operation and consumes large amounts of power, can thus be dispensed with. The supply of inert gas can easily be monitored by pressure measurement.

Abstract: A utility knife has a handle housing within which a slide bearing a knife is mounted for longitudinal displacement. Retraction means act on the knife to move it into a protected position. Turnably mounted within the housing (10) is a friction disk (22) which extends out of the handle housing (10) on the cutting-edge side of the knife blade (16). The axis of rotation (24) of said friction disk extends substantially perpendicularly to the plane of the knife blade. A driver member acts on the friction disk which advances the slide together with the knife blade into the cutting position thereof against the force of the retraction means.