Abstract: There is provided a pit initiation evaluation system or the like capable of predicting pit initiation effectively and at low cost. In a pit initiation evaluation system of an embodiment, a pit initiation evaluation unit creates and retains, based on a dry-wet alternate time data, a deposit impurity concentration data, and a pit initiation data on pitting corrosion initiated in each of a plurality of turbine stages when an operation is actually performed in the steam turbine, a pit initiation evaluation table presenting a relationship between a dry-wet alternate time, a deposit impurity concentration, and pit initiation. Further, the pit initiation evaluation unit is configured to evaluate, by using the pit initiation evaluation table, pitting corrosion to be initiated in each of the plurality of turbine stages in an operation planned for the steam turbine.

Abstract: A gas solenoid valve includes: a housing; a main valve body; a guide member; a first biasing member that is disposed in a housing space formed inward of the guide member to surround the main valve body and biases the main valve body in an opening direction; a second biasing member; and an electromagnetic drive device. The housing space is spaced apart from one end of the guide member in the opening direction. A buffer groove is formed at the one end of the guide member to surround an opening end of an inner hole of the guide member.

Abstract: A casing for gas including a first channel section through which gas flows and a second channel section intersecting with the first channel section, the first channel section having an intersecting part that intersects with the second channel section, the intersecting part being formed to have a rounded quadrangular cross section and having a flat part, the second channel section intersecting with the first channel section to open at the flat part.

Abstract: A gas solenoid valve includes: a housing including a first port, a second port, and a valve port leading to the first port and the second port; a main valve body capable of moving between a closed position thereof closing the valve port and an open position thereof opening the valve port and configured to move in an opening direction from the closed position to the open position by pressure of gas supplied through the first port; a biasing member that provides a biasing force acting in a closing direction to the main valve body to position the main valve body in the closed position; and an electromagnetic drive device that generates an excitation force opposing the biasing force of the biasing member to cause the main valve body to move to the open position. A damping chamber in the housing dampens movement of the main valve body.

Abstract: A valve device includes a valve block having a valve port through which a fluid passes and an insertion hole; a moving valve body that opens or closes the valve port; a guide member that is inserted in the insertion hole, and slidably guides the valve body; a solenoid that generates a magnetic field when energized; a stationary pole that cooperates with the solenoid to move the valve body; a tubular support member that is inserted in the insertion hole to accommodate the solenoid, and supports the guide member that receives pressure from the fluid passing through the valve port; and a lid member that closes an opening of the support member, and the support member is joined with the valve block.

Abstract: A hermetic terminal including a base made of a synthetic resin having a large-diameter part, designed to be attached to a hole part that connects to each of a low-pressure region and a high- pressure region, at least one electrode inserted through the base, and a seal member designed to be externally mounted on the base in a location closer to the high-pressure region than the large- diameter part, the large-diameter part having a parting line on an outer circumferential face thereof.

Abstract: A valve block for hydrogen gas includes a valve block body having an outer surface on which an aluminum anodizing treatment has been performed, and a flow channel for hydrogen gas formed in the valve block body, and the flow channel has a sealing face in an inner face, and the sealing face is a machined face.

Abstract: A gas solenoid valve includes: a housing; a main valve body; a guide member; a first biasing member that is disposed in a housing space formed inward of the guide member to surround the main valve body and biases the main valve body in an opening direction; a second biasing member; and an electromagnetic drive device. The housing space is spaced apart from one end of the guide member in the opening direction. A buffer groove is formed at the one end of the guide member to surround an opening end of an inner hole of the guide member.

Abstract: A gas solenoid valve includes: a housing including a first port, a second port, and a valve port leading to the first port and the second port; a main valve body capable of moving between a closed position thereof closing the valve port and an open position thereof opening the valve port and configured to move in an opening direction from the closed position to the open position by pressure of gas supplied through the first port; a biasing member that provides a biasing force acting in a closing direction to the main valve body to position the main valve body in the closed position; and an electromagnetic drive device that generates an excitation force opposing the biasing force of the biasing member to cause the main valve body to move to the open position. A damping chamber in the housing dampens movement of the main valve body.

Abstract: A glass ball safety valve includes: a housing including a valve passage connecting a first and second port; a valve element provided in the housing so as to close the passage, the element being movable in an open direction so as to open the passage; a biasing spring configured to bias the element in the open direction; a glass ball provided in the housing so as to support the element against biasing force of the biasing spring with a space between the element and the housing in the open direction, the glass ball including a longitudinal-direction intermediate portion that breaks at a predetermined temperature, the glass ball in a broken state allowing a movement of the valve element in the open direction; and a holding body provided in the housing and holding at least one of a first longitudinal-direction end-side portion and second longitudinal-direction end-side portion of the glass ball.

Abstract: A glass ball safety valve includes: a housing including a valve passage connecting a first and second port; a valve element provided in the housing so as to close the passage, the element being movable in an open direction so as to open the passage; a biasing spring configured to bias the element in the open direction; a glass ball provided in the housing so as to support the element against biasing force of the biasing spring with a space between the element and the housing in the open direction, the glass ball including a longitudinal-direction intermediate portion that breaks at a predetermined temperature, the glass ball in a broken state allowing a movement of the valve element in the open direction; and a holding body provided in the housing and holding at least one of a first longitudinal-direction end-side portion and second longitudinal-direction end-side portion of the glass ball.

Abstract: A valve device includes: a main valve element dividing a valve element space of a housing into first and second pressure chambers; a sealing member configured to isolate the first and second pressure chambers from each other; a first pilot passage including one end communicating with a primary passage, the other end communicating with the second pressure chamber, and a first restrictor; a second pilot passage including a second restrictor and formed at the main valve element; a pilot valve element configured to open and close the second pilot passage; a drive mechanism configured to, when a current flows through the drive mechanism, drive the pilot valve element such that the pilot valve element opens the second pilot passage against biasing force of a biasing member; and a pin coupling the main valve element and the pilot valve element to each other.

Abstract: A sliding seal seals an annular gap between a first member and a second member to separate a high-pressure side and a low-pressure side from each other, the first member being movable relative to the second member. The sliding seal is provided at an annular attaching groove provided at the second member. The sliding seal includes: a pressure fluid seal configured to slidingly contact a sliding surface of the first member; and a lubricant holding piece provided at the high-pressure side of the pressure fluid seal, a lubricant storage space being formed between the lubricant holding piece and the pressure fluid seal.

Abstract: A sliding seal seals an annular gap between a first member and a second member to separate a high-pressure side and a low-pressure side from each other, the first member being movable relative to the second member. The sliding seal is provided at an annular attaching groove provided at the second member. The sliding seal includes: a pressure fluid seal configured to slidingly contact a sliding surface of the first member; and a lubricant holding piece provided at the high-pressure side of the pressure fluid seal, a lubricant storage space being formed between the lubricant holding piece and the pressure fluid seal.

Abstract: A valve device includes: a main valve element dividing a valve element space of a housing into first and second pressure chambers; a sealing member configured to isolate the first and second pressure chambers from each other; a first pilot passage including one end communicating with a primary passage, the other end communicating with the second pressure chamber, and a first restrictor; a second pilot passage including a second restrictor and formed at the main valve element; a pilot valve element configured to open and close the second pilot passage; a drive mechanism configured to, when a current flows through the drive mechanism, drive the pilot valve element such that the pilot valve element opens the second pilot passage against biasing force of a biasing member; and a pin coupling the main valve element and the pilot valve element to each other.

Abstract: A hydrogen gas supply device supplies hydrogen gas to a fuel cell stack and includes an electromagnetic pressure regulating valve that regulates the pressure of the hydrogen gas to low pressure. The electromagnetic pressure regulating valve includes a housing, and a valve passage connecting a primary port and a secondary port is formed in the housing. A valve body controls an opening degree of the valve passage and is provided in the housing. A high-pressure sealing member and low-pressure sealing member are provided on an outer periphery of the valve body. The high-pressure sealing member and the low-pressure sealing member are provided in this order from one end side of the valve body to the other end side thereof. The electromagnetic pressure regulating valve further includes a housing pressure equalizing passage connecting the secondary port and a buffer chamber formed between the high-pressure sealing member and the low-pressure sealing member.

Abstract: A fusible plug type pressure relief valve includes a housing, a valve element, a spring member, and a fusible piece. A valve passage is formed in the housing. A valve element is arranged at a closed position in the housing, the closed position being a position at which the valve element closes the valve passage. The valve element is movable to an open position at which the valve element opens the valve passage. The spring member presses the valve element in an open direction. The fusible piece supports the valve element against pressing force of the spring member. The fusible piece melts at not less than a predetermined melting temperature. An inner surface of a concave portion of the fusible piece contacts the valve element. The concave portion includes a tapered portion inclined relative to an axis line of the valve element.

Abstract: The present invention includes: a valve main body including a filling port through which a fuel gas is filled in a tank and an output port through which the fuel gas in the tank is output; and a jet flow deflection piece through which the fuel gas to be filled through the filling port is ejected at a predetermined angle relative to an axial direction of the tank. The jet flow deflection piece includes: a fuel ejecting portion including an ejection port through which the fuel gas is ejected into the tank; and a temperature measuring portion in which a temperature sensor configured to measure a temperature of the fuel gas to be filled in the tank is provided. Thus, the temperature of the fuel gas when filling the fuel tank with the fuel gas can be precisely measure and monitored.

Abstract: A valve device includes main valve element and pilot valve element. The main valve element divides valve element space of housing into first pressure chamber and second pressure chamber. The pilot valve element is provided in the second pressure chamber. In one example, first pilot passage including first restrictor extends from primary passage to the second pressure chamber, and second pilot passage including second restrictor is formed at the main valve element. The main valve element and the pilot valve element are coupled to each other by pin, and gap is formed between the pin and one of the main valve element and the pilot valve element. The pilot valve element opens and closes the second pilot passage by biasing member and drive mechanism. The main valve element is driven so as to open the secondary passage by differential pressure between the first pressure chamber and the second pressure chamber.

Abstract: A valve device of the present invention includes: a main valve body interposed between a first pressure chamber of a main passage and a second pressure chamber; and a pilot valve body provided in the second pressure chamber. A first pilot passage including a first restrictor extends from an outside of a housing or a primary passage to the second pressure chamber, and a second pilot passage including a second restrictor is formed at the main valve body. The pilot valve body is maintained at a first operation position by a pilot valve body biasing member and is caused to move to a second operation position by a valve body driving unit. When the pilot valve body is located at the second operation position, the main valve body is caused to move to an open position by a pressure difference between the first pressure chamber and the second pressure chamber.