Abstract: Provided herein is a pipe joint of a relatively small joint diameter for use under ultrahigh pressure conditions. The pipe joint includes first and second joint members having mutually communicating fluid passages; and a gasket interposed between abutting end surfaces of the first and second joint members. The first and second joint members have ring-shaped seal projections formed at the abutting end surfaces thereof. The pipe joint satisfies a coefficient F of 0.4 or less in the following formula (1). F=(D32?D12)/(D42?D22), ??Formula (1): where D1 represents the inner diameter of the first and second joint members, D2 represents the inner diameter of the gasket, D3 represents the diameter of the seal projections, and D4 represents the outer diameter of the gasket.

Abstract: A handle 13 is formed in a hollow shape. A displacement sensor 4 is fixed to an inner surface of the handle 13. The target 5 includes: a target body 22 which is arranged at a position away from a valve stem by a predetermined distance in the handle 13; a detection-use inclined surface 23 which is formed on a surface of the target body 22 which faces the displacement sensor 4 in an opposed manner; and a downwardly projecting portion 25 which projects downward from the target body 22. A lower surface of the downwardly projecting portion 25 of the target 5 is received by a valve body 11b so that the target 5 is rotated together with the handle 13 but is not upwardly and downwardly moved with respect to the valve body 11b.

Abstract: A handle 13 is formed in a hollow shape. A displacement sensor 4 is fixed to an inner surface of the handle 13. The target 5 includes: a target body 22 which is arranged at a position away from a valve stem by a predetermined distance in the handle 13; a detection-use inclined surface 23 which is formed on a surface of the target body 22 which faces the displacement sensor 4 in an opposed manner; and a downwardly projecting portion 25 which projects downward from the target body 22. A lower surface of the downwardly projecting portion 25 of the target 5 is received by a valve body 11b so that the target 5 is rotated together with the handle 13 but is not upwardly and downwardly moved with respect to the valve body 11b.

Abstract: A water hammerless valve includes a pneumatically-operated valve having a valve disc for opening and closing a fluid channel by moving upward and downward through a pneumatic actuator operation, and a limiting mechanism for interfering with upward movement of the valve disc when the water hammer occurs. The limiting mechanism includes a stepping motor including a rotation shaft fixed on the upper actuator; a vertical movement component connected to the rotation shaft for moving upward and downward via rotation of the rotation shaft; a lower detecting component for detecting the fact that the vertical movement component contacts the upper end of a stem when the lower detecting component moves downward; and a control device for rotating the stepping motor, for controlling the air supply, and for transmitting a stop signal to the stepping motor when the lower end of the lower detecting component detects the fact.

Abstract: A jig for selecting a valve part number or a joint part number representing respective selected conditions required for selecting a valve or a joint comprising: a substantially rectangular base plate defining an inner space, and several sliding gauges laterally arranged in the inner space to slide in a longitudinal direction of the base plate, each of the sliding gauges comprising a condition description area including several conditions thereon from which the selected condition is determined, and a symbol description area including several symbols thereon, both the conditions and the symbols arranged in the sliding direction, several condition selecting windows laterally arranged, each of the condition selecting window being configured to expose one of the selected conditions, several symbol selecting windows laterally arranged, each of the symbol selecting window being configured to expose one of the selected symbols.

Abstract: A jig for selecting a valve part number or a joint part number represented by a combination of selected symbols representing respective selected conditions required for selecting a valve or a joint comprising: a substantially rectangular base plate defining an inner space, and a plurality of linear sliding gauge laterally arranged in the inner space to slide in a longitudinal direction of the base plate, the sliding gauge comprising a condition description area including a plurality of conditions thereon from which the selected condition is determined, and a symbol description area including a plurality of symbols thereon, both the conditions and the symbols arranged in a sliding direction of the sliding gauge, a plurality of condition selecting windows laterally arranged on a top of the base plate, each condition selecting window configured to expose one of the selected conditions, a plurality of symbol selecting windows laterally arranged on the top of the base plate longitudinally apart from the condition

Abstract: [Problems] To limit an opening of the fluid channel by automatically preventing the stem from upward movement caused by water hammer using a pneumatically-operating valve.

Abstract: To provide a handle equipped with a torque limiter capable of preventing application of excessive torque, and a fluid controller provided with the same. An elastic body (7) has a minimum-urging force capable of developing a function desired when the handle is lowered to the lowest position. Disposed in the handle are a transmitting member (8) urged by the elastic body and a transmitted material (10) against which the lower surface of the transmitting material is pressed. The surface of the transmitted material opposed to the transmitting material or the surface of the transmitting material opposed to the transmitted material is formed with serrations along the periphery having inclined surfaces (81, 101) and vertical surfaces (82, 102) which alternately appear. The inclined surfaces of the serrations are upwardly tapered along the direction of rotation in which the cover body descends.

Abstract: A specified metal member included among the components of a valve, coupling or like fluid handling part for use in piping and fluid control devices is made of an alloy comprising, in % by weight, 0.001 to 0.01% of C, up to 5% of Si, up to 2% of Mn, up to 0.03% of P, up to 100 ppm of S, up to 50 ppm of O, 18 to 25% of Cr, 15 to 25% of Ni, 4.5 to 7.0% of Mo, 0.5 to 3.0% of Cu, 0.1 to 0.3% of N, and the balance substantially Fe and other inevitable impurities, the alloy having a CRI (crevice corrosion resistance index) value in the range of 40?CRI?55, as determined from the expression CRI=[Cr]+4×[Mo]+30×[N] wherein the amount of alloy components present in combination in the alloy to ensure crevice corrosion resistance are expressed in % by weight.

Abstract: A fluid control device 1 comprises a metal body 2 having a fluid inlet channel 2a, a fluid outlet channel 2b and a communication channel 2c for holding the two channels in communication, and a metal slide member 3 vertically movable in a vertical passage 11 including the communication channel 2c for closing or opening the communication channel 2c with an end portion thereof. At least the end portion 3a of the slide member 3 is made of an alloy comprising, in % by weight, 0.001 to 0.01% of C, up to 5% of Si, up to 2% of Mn, up to 0.03% of P, up to 100 ppm of S, up to 50 ppm of O, 18 to 25% of Cr, 15 to 25% of Ni, 4.5 to 7.0% of Mo, 0.5 to 3.0% of Cu, 0.1 to 0.3% of N, and the balance substantially Fe and other inevitable impurities.

Abstract: A specified metal member (e.g., a bolt) 5 included among a plurality of components 2, 3, 4, 5, 6 of a fluid handling part and having a surface exposed on an exterior of the fluid handling part is made of an alloy comprising, in % by weight, 0.001 to 0.01% of C, up to 5% of Si, up to 2% of Mn, up to 0.03% of P, up to 100 ppm of S, up to 50 ppm of O, 18 to 25% of Cr, 15 to 25% of Ni, 4.5 to 7.0% of Mo, 0.5 to 3.0% of Cu, 0.1 to 0.3% of N, and the balance substantially Fe and other inevitable impurities.

Abstract: A pipe coupling 30 comprises a tubular body 31 for a pipe 32 to be inserted in through the rear end thereof, a front ring 33 and a back ring 34 to be fitted around the pipe 32 projecting from the rear end of the body 31, and a cap nut 35 for tightening up the front and back rings 33, 34 to fix the pipe 32 to the body 31. The back ring 34 is made of an alloy comprising, in % by weight, 0.001 to 0.01% of C, up to 5% of Si, up to 2% of Mn, up to 0.03% of P, up to 100 ppm of S, up to 50 ppm of O, 18 to 25% of Cr, 15 to 25% of Ni, 4.5 to 7.0% of Mo, 0.5 to 3.0% of Cu, 0.1 to 0.3% of N, and the balance substantially Fe and other inevitable impurities.