Abstract: A seat ring having a hollow cylindrical body portion with a flange surface as each of its side surfaces. The cylindrical body portion has stem through-holes above and below along a stem axial direction X and a stem penetrates said through-holes. An outer circumference of the body portion is formed in an elliptic shape with the stem axial direction X as its longitudial axis. The thickness of the body portion where the stem through-holes are provided is the maximum while the thickness of the body portion along an axis perpendicular to the longitudinal axis is the minimum.

Abstract: It is an object of the present invention to provide a resin gear for an electric power steering apparatus excellent in mechanical strength and durability, in which damage of teeth, for example, does not occur even when the gear is employed in an electric power steering apparatus equipped with a high-power electric actuator. In a resin gear for an electric power steering apparatus in the form of a worm wheel 10, a gear portion 16 thereof is formed of a resin molding material containing a thermosetting resin and polyparaphenylene-benzobisoxazole fibers (PBO fibers) as essential constituents.

Abstract: A fluid control system with easy installation in a semiconductor production system etc. and pipe and wiring connections, with reduced pressure loss due to pipe connections, with easy change of arrangement of modules, free from corrosion even using a corrosive fluid for the fluid, and enabling control of the flow rate even with pulsation of the inflowing fluid is provided. The fluid control system of the present invention is characterized by having a flowmeter sensor part having an ultrasonic oscillator generating an ultrasonic wave in a fluid and an ultrasonic oscillator receiving the ultrasonic wave generated from the ultrasonic oscillator and outputting a signal to a flowmeter amplifier and a control valve controlling the state of flow of fluid to a predetermined state by a working pressure, wherein the flowmeter sensor part and the control valve are arranged inside a casing having a fluid inlet and a fluid outlet.

Abstract: The present invention provides a seat ring with insert for a butterfly valve enabling improved valve seat sealing performance, valve stem sealing performance, and flange surface sealing performance, and enabling the easy and secure alignment of a valve stem in the manufacture of the seat ring and in the assembly of a valve body, and a method for manufacturing the same. A seat ring with insert for a butterfly valve configured so that an annular insert is fitted on the outer peripheral surface of the seat part in which there is provided a valve body fitting annular groove having side wall parts on both the upstream side and downstream side, wherein there are provided on the outer peripheral surface of the insert a step so that the outer diameter on the downstream side is smaller than the outer diameter on the upstream side and on the inner peripheral surface a locking projection, and the insert is fitted in the annular groove provided in the valve body fitting annular groove of the seat part.

Abstract: To provide resin-coated sand for a multilayer mold in which the consolidation strength of the casting mold obtained by using it and gas permeability thereof are improved at the same time, the amount of occurrence of pyrolytic products (tar, soot and the like) derived from organic substances is effectively inhibited, when molding is performed using such a casting mold, and further, the casting mold after molding can exhibit excellent collapsibility. Disclosed is resin-coated sand for a multilayer mold, in which surfaces of refractory particles are coated with a binder composition containing a phenolic novolak resin having an ortho/para bond ratio of methylene groups of 1.5 or more and an aromatic amine as indispensable constituents, and the grain fineness number is from 80 to 150.

Abstract: A carbon fiber composite material (10) is provided which includes carbon fibers (11), a matrix (12) binding the carbon fibers (11) together, and pores (13), and a volume fraction of the carbon fibers (11) exclusive of the pores (13) is not less than 45% and up to 80%. The carbon fiber composite material (10) may preferably have a porous structure of which a porosity is not more than 20% and up to 70%. This carbon fiber composite material (10) has a high static friction coefficient (?S), and low ? ratio, and thus is suitable for a wet friction member (e.g., carbon disc 5) which is excellent in both of static friction performance and dynamic friction performance.

Abstract: A valve includes a drive part (2) provided with a piston (4) for driving a valve element (7) in an axial direction, a valve body (1) formed at one end in the axial direction with a valve chamber (17) for accommodating the valve element (7), and a base seat (3). The drive part (2) includes leg parts (11) suspended down from one end in the axial direction. The leg parts (11) form a receiving part for accommodating the valve body (1) inside the leg parts. The valve body (1) is inserted into the receiving part so that the valve element (7) of the drive part (2) is accommodated in the valve chamber (17) of the valve body (1). Then, the base seat (3) is fixed to the leg parts (11) in the state with the seat (3) made to abut against the other end of the valve body (1) in the axial direction so that the valve body (1) is held between the base seat (3) and the drive part (2). Such a valve may be used in a fluid feed system, a fluid discharge system or other fluid system.

Abstract: An object of the present invention is to provide a fluid mixing system able to control the flow rates of different lines of fluid to mix them in any ratio, able to control the flow rate of even a pulsating fluid without problem, compact in configuration and able to be installed in a narrow space, and enabling easy pipe laying and pipe connection at the time of installation. In the system of the present invention, its feed lines 1, 2 are provided with fluid control valves 4, 10 changing the opening area of the channels to control the flow rates of the fluids, flow rate measuring devices 3, 9 measuring the actual flow rates of the fluids and converting the measured values of the actual flow rates to electrical signals for output, and control units 5, 11 outputting command signals for controlling the opening areas of the fluid control valve to the fluid control valves or equipment operating the fluid control valves based on the error between the measured values of the actual flow rate and the flow rate setting.

Abstract: An object of the present invention is to provide a fluid mixing system able to mix the fluids of different lines by any ratio and control the flow rates of even pulsating fluids, able to control the flow rate of even a pulsating fluid, compact in configuration and able to be installed in a narrow space, and enabling easy pipe laying and pipe connection at the time of installation.

Abstract: An object of the present invention is to provide a fluid mixing system able to mix the fluids of different lines by any ratio and control the flow rates of even pulsating fluids, able to control the flow rate of even a pulsating fluid, compact in configuration and able to be installed in a narrow space, and enabling easy pipe laying and pipe connection at the time of installation. In the system of the present invention, its two feed lines are provided with first and second fluid control valves, flow rate measuring devices measuring the actual flow rates of the lines and outputting signals, and control units outputting command signals for controlling the fluid control valves and mixing the fluids flowing through the two feed lines by any ratio. The first fluid control valve controls the pressure of the fluid by the pressure operation of the control fluid, while the second fluid control valve changes the opening area of the channel to control the flow rate of the fluid.

Abstract: A pinch valve is provided with a main body (10) accommodating a tube body (11), a cylinder body (2) having an upper cylinder portion (17) and a lower handle support portion (3), a piston accommodated in the cylinder portion, a pressing piece (9) fixed to the piston for pressing the tube body, a cylindrical handle (1), a hollow stem (4), and a piston pusher (5, 6). The handle has a female screw portion, and a male screw portion having a pitch larger than the pitch of the female screw portion and adapted to be screwed with the female screw portion formed on the handle support portion. The stem has a male screw portion adapted to be screwed with the female screw portion of the handle on outer periphery, and is accommodated in the cylinder body. The piston pusher is inserted into the stem so that the bottom end surface thereof comes into contact with the top end of the piston and is urged toward the piston by a spring.

Abstract: A valve includes a valve body (1, 2), a tube (3) made of an elastomer extending through the inside of the valve body, and a roller (23) and a pressing surface (14) disposed facing each other across the tube (3). The roller (23) can be brought close to the pressing surface (14) to collapse the tube (3) between the roller (23) and pressing surface (14) and close the flow passage in the tube (3), and the roller (23) can be moved along the tube (3) to make a collapsed position where the tube (3) is collapsed by the roller (23) and the pressing surface (14) move along the flow passage axis of the tube (3) while maintaining the flow passage in the closed state.

Abstract: A constant flow valve has a chamber (6) provided therein with a first diaphragm (8) having a valve member (7), a second diaphragm (9) and a third diaphragm (10). The chamber is divided into a first pressure chamber (11), a second valve chamber (12), a first valve chamber (13) and a second pressure chamber (18). The first pressure chamber has means for applying a constant inward force to the second diaphragm, and the second pressure chamber has means for applying a constant inward force to the third diaphragm. The first valve chamber is communicated with an inlet channel, the second valve chamber has a valve seat (27) corresponding to the valve member, and the valve seat divides the chamber into a bottom valve chamber (14) communicating with the first valve chamber through a communication hole formed in the first diaphragm and a top valve chamber (15) communicating with an outlet channel.

Abstract: An ultrasonic flowmeter includes two ultrasonic transceivers (10, 16). Each of the ultrasonic transceiver (10, 16) includes a transmitting body (1; 12) fixed to the outer peripheral surface of a measurement pipe (6) through which a fluid to be measured flows so as to surround the measurement pipe (6), and an ultrasonic transducer (2; 13) spaced from the outer peripheral surface of the measurement pipe (6). The transmitting body (1) has axial end surfaces (8a, 8b) perpendicular to the axis of the measurement pipe (6). An axial end surface (7) of the ultrasonic transducer (2) is fixedly secured to the axial end surface (8b) of the transmitting body (1), and the ultrasonic transducer (2) is extended and contracted in the axial direction by applying a voltage between the axial end surfaces (8a, 8b) of the ultrasonic transducer (2).

Abstract: A valve (100) includes a body (1) having a valve seat (10) formed therein, a bonnet (2), a diaphragm (3) supporting a valve element (18) abutting against and moving away from the valve seat (10), and an elastic member such as an O-ring (5). The body (1) is formed with an annular groove (13) extending around the valve seat (10), and the diaphragm (3) is provided at the peripheral edge (20) with an annular engagement part (21) formed to have an approximate L-shape in cross-section. The annular engagement part (21) is inserted into the annular groove (13) in a tight state by the elastic member disposed between the bonnet (2) and the annular engagement part (21) of the diaphragm (3).

Abstract: A process for advantageously producing, in a short period of time, a phenolic novolak resin, in which substantially no unreacted aldehyde remains, by using a continuous reactor, while a generation of high order condensation products is prevented. In continuously producing the phenolic novolak resin by reacting at least one of phenols with at least one of aldehydes in the presence of an acidic catalyst by using a continuous reactor which has a long reaction tube: the reaction tube is provided with a heating zone and a temperature control zone; a mixture of raw materials is heated, at the heating zone, to a temperature not less than a temperature, at which a reaction heat is generated; and then the mixture is subjected to a cooling operation at the temperature control zone, while the pressure within the reaction tube is kept to be not lower than a vapor pressure of water.

Abstract: To provide a light-weight resin member, for a valve, which has high strength and can be used in a high-temperature atmosphere, and is also excellent in chemical resistance and corrosion resistance. A resin member for a valve, which is produced by molding a molding material having a tensile strength of 80 to 400 MPa at normal temperature, and a resin member for a valve, which is produced by molding a molding material having a tensile strength of 75 to 350 MPa at 120° C. are disclosed. There is also disclosed a resin member for a valve, which is produced by molding a molding material comprising a resin composition containing an epoxy acrylate resin (A) having a hydroxyl value of 60 to 100, a polyisocyanate compound (B) having 0.1 to 1.5 isocyanate groups per one hydroxyl group of the epoxy acrylate resin (A), a curing agent (C) and an internal mold release agent (D), and 20 to 70% by weight of a fiber reinforcing material (E).

Abstract: A phenolic novolak having the contents of a monomeric phenol and a dimeric phenol and a degree of dispersion controlled can be obtained in high yield by a process for production of a phenolic novolak having a step of conducting a heterogeneous reaction of a phenol and an aldehyde in the presence of a phosphoric acid and an unreactive oxygen-containing organic solvent as a reaction cosolvent.

Abstract: The present invention relates to a phenol resin composition comprising a phenol resin and boehmite having an average particle diameter (minor diameter) of 100 nm or less, and a phenol resin composition further comprising a benzooxazine resin in a weight ratio of the phenol resin to the benzooxazine resin within a range from 95/5 to 25/75. In a specific aspect, the phenol resin composition of the present invention is characterized in that it contains boehmite having an aspect ratio within a range from 1 to 100 and also contains an alumina-based compound as a filler, an amount of the boehmite being from 1 to 150 parts by weight based on 100 parts by weight of the phenol resin.