Abstract: A tube unit includes multiple tubes and bundling portions that bundle end portions of respective tubes at opposite ends of the tubes. At least one of the end portions of respective tubes has a tube wall portion that tubularly extends in an extension direction of the tubes and also has a protrusion protruding radially outward from the tube wall portion.

Abstract: A degassing apparatus capable of preventing cross-contamination is provided. A degassing apparatus 1 includes degassing modules 10, 20, and 30 each having a tube unit 12 that is a gas permeable membrane separating a fluid circulation space S1 and a reduced-pressure space S2 from each other, vacuum piping 40 communicatively connected to the reduced-pressure spaces S2, a discharge device 50 that discharges gas in the reduced-pressure spaces S2 through the vacuum piping 40, atmospheric release piping 60 communicatively connected to the reduced-pressure spaces S2, an atmospheric release valve 70 capable of introducing atmosphere into the reduced-pressure spaces S2 through the atmospheric release piping 60, and a control unit 80 that controls the operation of the discharge device 50 and the atmospheric release valve 70.

Abstract: A tube unit includes multiple tubes, a bundling portion that bundles end portions of the tubes, and pipe elements that are inserted into respective end portions of the tubes and support the end portions of the tubes from inside. A degassing module includes the tube unit and a housing in which the tube unit is accommodated and that separates inside spaces inside the respective tubes from an outside space outside the tubes. In addition, each tube is a tubular membrane that allows gas to pass therethrough and prohibits liquid from passing therethrough. The housing has an inside-space opening that is in communication with the inside spaces of the tubes and an outside-space opening that is in communication with the outside space of the tubes.

Abstract: A tube unit includes multiple tubes and bundling portions that bundle end portions of respective tubes at opposite ends of the tubes. At least one of the end portions of respective tubes has a tube wall portion that tubularly extends in an extension direction of the tubes and also has a protrusion protruding radially outward from the tube wall portion.

Abstract: The present invention provides an ozonization apparatus which is not only capable of dissolving ozone in material water with high efficiency and speedily but also enables the easy and proper control of the dissolved ozone concentration of ozone water. The present invention relates to an ozonization apparatus comprising an ozone gas-permeable membrane disposed to isolate material water and ozone gas from each other and allow said ozone gas to be dissolved in said material water by permeation, said ozone gas-permeable membrane being a nonporous hollow tube which is selectively gas-permeable and liquid-impermeable.

Abstract: The present invention provides an ozonization apparatus which is not only capable of dissolving ozone in material water with high efficiency and speedily but also enables the easy and proper control of the dissolved ozone concentration of ozone water.

Abstract: A unit for degassing liquids including soft, viscous substances. The unit comprises a pipe body having an interior, and a tube housed within the interior of the pipe so as to allow liquids to flow through the porous tube. The tube is of a material porous to the passage of gases but not the passage of liquids.

Abstract: A measuring apparatus for measuring the number and size of impurities such as dust and bacteria in super-pure water includes a sealed container; a sample supply line which sealingly interconnects a source of super-pure water with the sealed container and supplies a sample mixture of super-pure water and electrolyte to the sealed container; an overflow pipe which sealingly connects with the side of the sealed container; a negative electrode which extends into the sample mixture in the sealed container; a hollow sensor which extends into the sample mixture in the sealed container, the hollow sensor containing a positive electrode surrounded by electrolyte and having a small hole at its lower end; and a detecting circuit connected to said negative and positive electrodes for supplying a certain DC current therebetween and detecting voltage pulses caused by impurities passing through the small hole into the hollow sensor.

Abstract: An apparatus for adjusting concentration of a solution comprises a plurality of semipermeable membrane tubes located within a container, a liquid A supply pipe connected to the container and communicating with the interior of said semipermeable membrane tubes and a liquid B supply pipe connected to said container to communicate with the exterior of the tubes.

Abstract: An electrical pulse apparatus for measuring impurities in ultrapure water includes a deaeration device connected to the conduit line supplying electrolyte to the hollow detector so as to deaerate the electrolyte and enable bubbles formed by electrolysis at the electrodes to be readily redissolved and thus increase measurement sensitivity and speed.

Abstract: A degassifying apparatus for removing air or other dissolved gas from liquid comprises a degassifying tank placed under at least a partial vacuum. The apparatus also includes a coiled tube having a plurality of turns in a generally spiral configuration which is positioned within the tank. Spacer elements are positioned between adjacent coiled turns of the tube and/or between the tube and an inner wall of the tank to eliminate contact between the tube and the tank and to thereby maximize the total surface area of the tube which is exposed to the decompressed atmosphere within the tank. This provides a highly desirable and advantageous degassifying effect to the liquid being conducted through the tube.