Abstract: A pressure reduction valve includes a body including a gas passage, a valve seat provided in the gas passage, and a valve member provided on a downstream side of the valve seat in the gas passage. The gas passage includes a primary-side passage section located on an upstream side of the valve member, and a secondary-side passage section located on a downstream side of the valve member. The primary-side passage section includes a pressure chamber, which is a space formed between the valve member and the valve seat. The valve member includes a valve member passage that connects the pressure chamber to the secondary-side passage section, and an auxiliary passage configured to assist gas that flows into the pressure chamber through a clearance between the valve member and the valve seat to flow out to the secondary-side passage section.

Abstract: A pressure reducing valve includes: a body, a valve seat, and a valve element opening and closing the valve seat according to a difference between a pressure on the inlet side and a pressure on the outlet side. A pressure chamber, which is a space part between the valve element and the valve seat, is provided on the inlet side of the valve element. The valve element includes a plurality of horizontal holes each opening to the pressure chamber, and a vertical hole bringing the horizontal holes and the outlet side of the valve element into communication with each other. The horizontal holes and the vertical hole are provided in such a manner that a value of a ratio of a flow channel area of the vertical hole to a total area that is a total of flow channel areas of the horizontal holes exceeds 1.16.

Abstract: A pressure reducing valve includes: a body, a valve seat, and a valve element opening and closing the valve seat according to a difference between a pressure on the inlet side and a pressure on the outlet side. A pressure chamber, which is a space part between the valve element and the valve seat, is provided on the inlet side of the valve element. The valve element includes a plurality of horizontal holes each opening to the pressure chamber, and a vertical hole bringing the horizontal holes and the outlet side of the valve element into communication with each other. The horizontal holes and the vertical hole are provided in such a manner that a value of a ratio of a flow channel area of the vertical hole to a total area that is a total of flow channel areas of the horizontal holes exceeds 1.16.

Abstract: A valve device includes a body in which a gas flow passage is provided; and a check valve provided in the gas flow passage, the check valve including a poppet and a valve seat. The poppet excluding a block portion is in a form of a hollow shaft, the block portion being located at a distal end of the poppet and having a taper shape, and the poppet has at least one side hole that provides communication between an inside and an outside of a portion of the poppet, the portion being in the form of the hollow shaft. The at least one side hole extends obliquely with respect to a central axis line of the poppet such that the at least one side hole extends along a gas flow direction inclined with respect to a direction in which the poppet moves when the check valve opens.

Abstract: A pressure reducing valve comprises an open-close valve and a piston. The open-close valve makes switching between connecting and isolating a primary port and a secondary port. The piston makes sliding motion inside the cylinder according to a difference between force applied from the pressure regulating chamber and force applied from the pressure reducing chamber, thereby opening and closing the open-close valve. The open-close valve includes a valve stem and a valve seat fixing member. The valve seat fixing member restrains displacement of the piston toward a side upstream of the open-close valve by abutting on an end surface of the piston. The valve seat fixing member includes a channel hole communicatively connecting a housing part for the valve stem and the pressure reducing chamber.

Abstract: A valve device includes a body in which a gas flow passage is provided; and a check valve provided in the gas flow passage, the check valve including a poppet and a valve seat. The poppet excluding a block portion is in a form of a hollow shaft, the block portion being located at a distal end of the poppet and having a taper shape, and the poppet has at least one side hole that provides communication between an inside and an outside of a portion of the poppet, the portion being in the form of the hollow shaft. The at least one side hole extends obliquely with respect to a central axis line of the poppet such that the at least one side hole extends along a gas flow direction inclined with respect to a direction in which the poppet moves when the check valve opens.

Abstract: A pressure reducing valve comprises an open-close valve and a piston. The open-close valve makes switching between connecting and isolating a primary port and a secondary port. The piston makes sliding motion inside the cylinder according to a difference between force applied from the pressure regulating chamber and force applied from the pressure reducing chamber, thereby opening and closing the open-close valve. The open-close valve includes a valve stem and a valve seat fixing member. The valve seat fixing member restrains displacement of the piston toward a side upstream of the open-close valve by abutting on an end surface of the piston. The valve seat fixing member includes a channel hole communicatively connecting a housing part for the valve stem and the pressure reducing chamber.

Abstract: A thermoplastic resin composition having a pearly luster essentially comprising about 30 to 70% by weight of a polymethyl methacrylate and about 70 to 30% by weight of a styreneacrylonitrile copolymer having an acrylonitrile content of about 25 to 32% by weight. By adding glass fibers to the thermoplastic resin composition, the pearly luster thereof can be further improved and by adding an acrylonitrile-butadiene-styrene resin to the thermoplastic resin composition, the Izod impact value of the resin composition can be increased.