Abstract: The invention refers to a pressure-measuring device for converting a mechanical or hydraulic pressurization in a measuring signal and for forwarding the measuring signal to a remote evaluation unit.

Abstract: Pressure holding and regulating valve characterized by a cylindrical valve housing (1) with an upper side (2), in which a central inlet bore (3) is provided with a diameter d1, and with a lower side (4), in which an inner bore (5) is, whose diameter d2 is greater than that of the diameter of the inlet bore (3) and which forms an outlet of the pressure holding and regulating valve, a closure piston (8) with an upper part (9) whose diameter d3 smaller than the diameter d2 of the inner bore (5) and larger than the diameter d1 of the inlet bore (3) is a freely movable, circular sealing disc (7) made of an elastomer between the closure piston (8) and an inner sealing surface (6) between the inner bore (5) and the inlet bore (3) on an inner side of the valve housing (1) is formed, and by a compression spring (12) which is supported in the inner bore (5) and presses trough the closure piston (8) the sealing washer (7) against the inner sealing surface (6).

Abstract: Metering device for metering a readily combustible substance, in particular acrolein acetal, from a source or a container for the substance into a vacuum line (38) by a pump whose pump power is controllable, characterized in that the pump is driven a compressed air motor (28) operated displacement pump (26), and that between the positive displacement pump (26) and the vacuum line (38) a pressure holding and regulating valve is arranged whose dimensionless delivery height H/Ho[mWS/1 mWS] with the dimensionless delivery rate Q/Qo[m3/h/1 m3/h] according to the Formula: {H/Ho}={C1*(Q/Qo)}0.333, where. H=Hydraulic pressure at the inlet of the pressure holding and regulating valve Ho=1 mWS C1=Constant for the pressure holding and regulating valve Q=Hydraulic flow rate Qo=1 m3/h.

Abstract: The invention relates to a conveyor device for a vacuum distillation plant for substance mixtures that polymerize and/or decompose readily, in particular acrolein, in which plant an intermediate product formed in a preliminary stage is delivered by means of a pump into a vacuum distillation column (37). The invention is characterized in that the pump is a hermetically sealed centrifugal pump (31) having a magnetic coupling, and in that a pressure holding control valve (34), which is configured to adjust the throughput of the centrifugal pump (31) to a predetermined value, is provided between the centrifugal pump (31) and the vacuum distillation column (37).

Abstract: The invention refers to a pressure-measuring device for converting a mechanical or hydraulic pressurization in a measuring signal and for forwarding the measuring signal to a remote evaluation unit.

Abstract: The invention relates to a component set for producing a polyurethane coating agent that can be cured by a chemical isocyanate reaction, at least comprising (A) a liquid reaction component A containing the polyhydroxyl compound of the polyurethane binder, (B) a liquid reaction component B containing the polyisocyanate for cross-linking the polyhydroxyl compound, wherein an inorganic filler is contained in components A and/or B, and wherein the reaction components A and/or B contain a volatile compound of formula (I), where R2, R3, R4=the methyl or ethyl group, and (C) component C as a separately provided flow agent and catalyst, said component C containing a titanium compound of formula Ti(OR)x(OCOR1)y, where R1=C1 to C8 hydrocarbon group; R1=C10-C18 hydrocarbon group; x=1 or 2; y=2 or 3; x+y=4. The invention further relates to a method for producing a polyurethane coating agent and to the use of the set of components to produce a polyurethane coating agent.

Abstract: A mixing and metering device for mixing and metering liquid chemicals comprises a circulation pump having a suction port and a pressure port, a pipe coil, the contents volume of which is dimensioned such that the chemicals metered into the device have a residence time sufficient for the chemical reaction, a choke tube which guides the circulation stream exiting from the pipe coil, with formation of a choke point, from the outlet of the pipe coil to a metering conduit which is arranged between the choke tube and the suction port of the circulation pump and at least two metering valves, and also a falling tube which is connected to the choke tube and has a vacuum flange for connection of the mixing and metering device to a vacuum device.

Abstract: An improved urethane pre-polymer-based surface coating comprising a mineral filler the improvement comprising a benzothiazolythio compound and arylsulphorylisocyanate compound. A method of delaying or preventing the cross-linking or gelation of a urethane pre-polymer-based surface coating prepared with a mineral filler, comprises adding to of the formulation the surface coating a benzothiazolythio compound and an arylsulphonylisocyanate compound in amounts effective to prevent or delay the cross-linking or gelation of the surface coating.

Abstract: Stabilized 3,3 dialkoxy-1-propene-preparation containing a compound of the formula I wherein R=C1-C6 hydrocarbon group and a compound of the formula II Z(—R1)X(—OR2)Y where Z=C (carbon) or Si (silicon); R1=H or C1-C3 carbon group; R2=C1-C3 carbon group; x=0 or 1, x+y=4.

Abstract: The invention relates to a pipeline system for transporting a biocide solution from a reactor device (1) for generating biocide solution to a treatment device (5) for introducing the biocide solution into a ballast water flow in a ballast water line (92, 94) having a transport line system (11, 42, 54) between the reactor device (1) and the treatment device (5) of the ballast water treatment system. The invention is characterized by a pressurized water line system (8, 44) connecting a pressurized water source (2) to the transport line system (11, 42, 54) at the connection thereof to the reactor device (1), and by a flush water line system (9, 30, 40) connected to the transport line system (11, 42, 54) at the connection thereof to the treatment device (5).

Abstract: A apparatus for treating ballast water with acrolein which is to be connected to a main ballast water line of a ballast water unit, comprises a reactor device to which acrolein derivate and water is to be fed for generating an aqueous acrolein solution, a branch line which is connected to the main ballast water line for branching off a partial ballast water stream, and a mixing device which is connected to the branch line and an acrolein solution supply line from the reactor device and is designed for diluting the aqueous acrolein solution from the reactor device, and a feed device for supplying the aqueous acrolein solution from the mixing unit to the main ballast water line.

Abstract: The invention relates to a container for liquid chemicals comprising a cylindrical container shell (4), an upper curved base (6) and a lower curved base (8) and also a container inflow (58, 60) and a container outflow (38, 42). The invention is characterized in that the container inflow (58, 60) and the container outflow (38, 42) are arranged at the upper curved base (6) of the container and in that a drainage tube (34) is provided which extends form the container outflow (38, 42) to the lower curved base (8).

Abstract: A method for cleaning waste water is provided whereby the waste water is led through a throughput tank having filler materials to which aerobic microorganisms are adhered and wherein the throughput tank is ventilated with an oxygen-containing gas. As filler materials, materials are used which have a specific weight approximately equal to the specific weight of the waste water whereby the filler materials are suspended in the waste water. The inflow of the waste water into the throughput tank and the ventilation of the throughput tank is affected from bottom of the throughput tank and in such a gas amount that the waste water and the filler bodies suspended therein are mixed and the microorganisms on the filler bodies are supplied with sufficient oxygen. The device has a throughput tank with a tank bottom, a tank wall, wherein the inflow connecting pipe and the ventilation arrangement are arranged on the tank bottom and the outflow connecting pipe is arranged at the upper area of the throughput tank.

Abstract: Feeder device for feeding aqueous acrolein solution to a main ballast water line of an apparatus for treating for an apparatus for shops for treating ballast water with acrolein comprises an annular nozzle which is dimensioned for usage in the main ballast water line, wherein the annular nozzle comprises a nozzle ring comprising a plurality of nozzle openings distributed over the interior circumference of the nozzle ring.

Abstract: An improved urethane pre-polymer-based surface coating comprising a mineral filler the improvement comprising a benzothiazolythio compound and arylsulphorylisocyanate compound. A method of delaying or preventing the cross-linking or gelation of a urethane pre-polymer-based surface coating prepared with a mineral filler, comprises adding to of the formulation the surface coating a benzothiazolythio compound and an arylsulphonylisocyanate compound in amounts effective to prevent or delay the cross-linking or gelation of the surface coating.

Abstract: The invention relates to a contact filter device for filtering untreated water (R) and delivering clean water (P), with a rectangular filter box (1) in which an admission duct (7) is arranged on a wall of the filter box (1), and in which a bundle of catalyst tubes (30) is provided between the admission duct (7) and a side of the filter box (1) lying opposite the admission duct (7). The width of the admission duct (7) is approximately equal to the width of the filter box (1), and the depth of the admission duct (7) is a fraction of the width of the filter box (1), and the admission duct (7) has, at its upper area, an admission stub (13) for the untreated water (R) and, at the bottom, is open towards the interior of the filter box (1).

Abstract: A mixing and metering device for mixing and metering liquid chemicals comprises a circulation pump having a suction port and a pressure port, a pipe coil, the contents volume of which is dimensioned such that the chemicals metered into the device have a residence time sufficient for the chemical reaction, a choke tube which guides the circulation stream exiting from the pipe coil, with formation of a choke point, from the outlet of the pipe coil to a metering conduit which is arranged between the choke tube and the suction port of the circulation pump and at least two metering valves, and also a falling tube which is connected to the choke tube and has a vacuum flange of the mixing and metering device to a vacuum device.

Abstract: A container for liquid chemicals is disclosed, comprising a cylindrical container shell, an upper curved base and a lower curved base, and also a container inflow and a container outflow, wherein the container inflow and the container outflow are arranged at the upper curved base of the container and a drainage tube is provided which extends form the container outflow to the lower curved base.

Abstract: An anode device for an electro-f locculation cell, is provided comprising a bed of metal granules (1c) through which raw water is flown from the bottom to the top, is loosely provided in a cell box (3) out of insulating material on an electrically conducting electrode (1) plate provided with insulating material nozzles (Da1-Dc1) and serving as current feeding means to the metal granules (1c), further comprising non-conducting, hydraulic tube connections (6a-6c) which are provided from the insulating material nozzles (Da1-Dc1) to outlet sockets of the tubular manifold (7) for raw water, and at least two gas injectors (9) for the supply of driving a gas which are protruding into the tubular manifold (7) and are connected to a gas supply device (8), wherein fluid connections for the driving gas and the raw water are provided from the outlet sockets (7a1-7c1) of the tubular manifold (7) through to the non-conducting tube connections and the insulating material nozzles to the metal granules (Ic) provided within th

Abstract: The present invention provides a high volume, foul-resistant electrolytic process for treating contaminated water comprising at least one upflow electroflocculation cell consisting of (i) a lower (or “bottom”) electrode (3) in form of a porous, non-fluidized bed of loose iron or aluminium granules kept in periodic motion by pulsed gas injections and (ii) an upper (or “top”) vibrating electrode (4) made of an iron or aluminium grid mesh or ribmesh. A voltage potential between the upper (4) and lower (3) electrode causes ions to be released from the moving electrodes. These ions oxydise and/or render insoluble contaminants in the ascending flow of wastewater and create easy filterable insoluble contaminants resulting in substantially cleansed water. Such moving electrodes electroflocculation cells are useful at municipal water works and commercial and industrial applications were large amounts of raw water have to be processed.