Abstract: A valve has a valve body provided on its inner peripheral surface with a seat ring, a stem arranged to extend in a direction substantially perpendicular to the axis of a flow passage defined in the valve body, and a valve element rotatably supported through a bush attached to the stem, and opens or closes the flow passage by pressing or separating the valve element against or from the seat ring in the valve body in accordance with the rotation of the valve element. The valve body is molded after the valve element, the seat ring, the stem, and the bush are placed in predetermined positions in a mold.

Abstract: Disclosed are a piping member formed by using a propylene-based resin composition comprising 100 parts by mass of a propylene-ethylene random copolymer (A) having an ethylene content of 2 to 5%, a crystallization temperature of 86 to 105° C., a melt flow rate of 0.01 to 2.00 g/10 min and a molecular weight distribution of 3 to 8, and 1 to 15 parts by mass of a styrene-butadiene-base rubber (B) having a styrene content of 10 to 40% and a weight average molecular weight of 200,000 or more as essential components, a melt flow rate after kneading being from 0.01 to 2.00 g/10 min, characterized in that the propylene-based resin composition further comprising a hindered amine-based light stabilizer (C) having a weight average molecular weight of 2,000 or more in the amount of 0.1 to 1.

Abstract: A fluid controller that allows facilitated installment, piping and wiring connection to semiconductor manufacturing equipment and does not corrode even when a corrosive fluid is used, includes a flowmeter sensor section having a first ultrasonic transducer which transmits ultrasonic waves in a fluid and a second ultrasonic transducer which receives the ultrasonic waves transmitted from the first ultrasonic transducer and outputs the signal thereof to a flowmeter amp section. An adjustment valve that adjusts the flow rate of the fluid using operation pressure is provided, and at least the flowmeter sensor section and the adjustment valve are connected to and disposed in a casing having a fluid inlet and a fluid outlet.

Abstract: A seat ring has an 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 an annular groove provided in the valve body fitting annular groove of the seat part.

Abstract: The fluid control system according to the present invention is characterized by being provided with a fluid control valve changing an opening area of a passage so as to control a flow rate of a fluid, a flow rate measuring device measuring a flow rate of the fluid, converting a measurement value of said flow rate to an electrical signal, and outputting it, and a control part outputting a command signal for controlling an opening area of said fluid control valve to said fluid control valve or a piece of equipment operating said fluid control valve based on a difference between the electrical signal from the flow rate measuring device and a set flow rate as a first characterizing feature.

Abstract: An ultrasonic flowmeter includes two ultrasonic transceivers. Each of the ultrasonic transceivers includes a cylindrical transmitting body closely fixed to the outer peripheral surface of a measurement pipe through a fluid flows so as to surround the measurement pipe, and an ultrasonic transducer surrounding the measurement pipe and spaced apart from the outer peripheral surface of the measurement pipe. The transmitting body is made of a rubber material and has axial end surfaces extending perpendicular to the axis of the measurement pipe. The axial end surface of the ultrasonic transducer is fixedly secured to the axial end surface of the transmitting body, and the ultrasonic transducer is extended and contracted in the axial direction thereof by applying a voltage between the axial end surfaces of the ultrasonic transducer.

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: It is an object of the present invention to provide a phenolic novolak resin for a shell mold which is capable of simultaneously solving a problem of gas defect caused by a tar generated at the time of casting and a problem of a casting defect represented by veining. As the phenolic novolak resin in RCS for the shell mold, there is used a copolycondensation resin-type phenolic novolak resin obtained by reacting a phenol and an alkylphenol, with at least one of aldehydes, wherein a ratio of an ortho-bond to a para-bond of a methylene group in the phenolic novolak resin is not less than 1.5, and a fire-resisitant particle is coated with this resin.

Abstract: An object of the present invention is to provide a constant flow valve able to make the flow rate constant at all times even if the upstream and downstream side fluid pressure of the valve fluctuates for a large flow rate fluid and able to set the flowing fluid to any flow rate.

Abstract: A valve includes a drive part provided with a piston for driving a valve element in an axial direction, a valve body formed at one end in the axial direction with a valve chamber for accommodating the valve element, and a base seat. The drive part includes leg parts suspended down from one end in the axial direction. The leg parts form a receiving part for accommodating the valve body inside the leg parts. The valve body is inserted into the receiving part so that the valve element of the drive part is accommodated in the valve chamber of the valve body. Then, the base seat is fixed to the leg parts in the state with the seat made to abut against the other end of the valve body in the axial direction so that the valve body is held between the base seat and the drive part.

Abstract: A propylene-based resin composition for a pipe member, and a pipe member and multi-layered pipe member formed using that the same, which is comprised of (a) 65 to 90 parts by mass of a propylene resin homopolymer, (b) 10 to 25 parts by mass of talc having an average particle size of 1 to 10 ?m and (c) 1 to 10 parts by mass of at least one kind of a rubber component selected from an ethylene-propylene-based rubber, an ethylene-butene-based rubber, a styrene-butadiene-based rubber and a styrene-isoprene-based rubber as main components, wherein the MFR of a melt-kneaded mixture obtained by melt kneading these components (a) to (c) is from 0.01 to 2.00 g/10 minutes.

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: A connecting structure for piping members facilitates connection thereof and ensures prevention of liquid leakage. A first piping member includes a first channel, and at least one first joint surface in which at least one first opening communicating with the first channel and a first annular groove are provided. A second piping member includes a second channel, and at least one second joint surface in which at least one second opening communicating with the second channel and a second annular groove are provided. A sleeve for connecting the first and second piping members includes a central bore. The sleeve includes a pair of inserting sections and a partition therebetween. The inserting sections are thinner radially as compared to the partition and are configured to accommodate at least one elastic body which provides a seal when the inserting sections are press-inserted into the first and second annular grooves.

Abstract: A resin gear for an electric power steering apparatus is provided which offers excellent mechanical strength and durability, and in which damage of teeth, does not occur even when the gear is employed in an electric power steering apparatus equipped with a high-power electric actuator. The resin gear for an electric power steering apparatus includes a worm wheel, and a gear portion thereof is formed of a resin molding material containing a thermosetting resin and polyparaphenylene-benzobisoxazole fibers (PBO fibers) as essential constituents.

Abstract: A fluid controller that allows facilitated installment, piping and wiring connection to semiconductor manufacturing equipment and does not corrode even when a corrosive fluid is used, includes a flowmeter sensor section having a first ultrasonic transducer which transmits ultrasonic waves in a fluid and a second ultrasonic transducer which receives the ultrasonic waves transmitted from the first ultrasonic transducer and outputs the signal thereof to a flowmeter amp section. An adjustment valve that adjusts the flow rate of the fluid using operation pressure is provided, and at least the flowmeter sensor section and the adjustment valve are connected to and disposed in a casing having a fluid inlet and a fluid outlet.

Abstract: A piping device includes a body, a tube accommodated in the body and defining a flow passage, coupling members each having an insert portion, at one end thereof, to be inserted into the tube in a watertight state, a connecting portion at the other end thereof, and a flange portion at the central part thereof, and holding members each formed with a through hole at the central part thereof. The through hole of the holding member includes, at one end thereof, an expanded-diameter portion having a hole diameter larger than the remaining portion of the through hole.

Abstract: A manifold valve having two valves, which enables operation of one valve while disables operation of the other valve, is compact, and facilitates installation in and detachment from a pipeline, that is, a manifold valve provided with a main passageway, a branch passageway split off from the main passageway, a main passageway valve opening and closing the main passageway, and a branch valve opening and closing the branch passageway, the main passageway, the branch passageway, the main passageway valve, and the branch valve being integrally formed, wherein the main passageway valve and the branch valve are each a manual valve having a valve element, a stem connected to the valve element, and an operating lever connected to the stem, the operating lever pivoting in an axial direction of the stem to open and close the passageway, the main passageway valve and the branch valve each converting pivoting motion of the operating lever to linear motion of the valve element and pressing the valve element against and sep

Abstract: It is an object of the present invention to provide a phenolic novolak resin for a shell mold which is capable of simultaneously solving a problem of gas defect caused by a tar generated at the time of casting and a problem of a casting defect represented by veining. As the phenolic novolak resin in RCS for the shell mold, there is used a copolycondensation resin-type phenolic novolak resin obtained by reacting a phenol and an alkylphenol, with at least one of aldehydes, wherein a ratio of an ortho-bond to a para-bond of a methylene group in the phenolic novolak resin is not less than 1.5, and a fire-resisitant particle is coated with this resin.

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).