In a throttle device depressurizing and sending a refrigerant condensed by the condenser to the evaporator, hunting of a needle valve is prevented and hysteresis in differential pressure-flow rate characteristics in a high-pressure region is reduced. A valve seat member, in which a valve port is formed, and a cylindrical guide member, which is integral with the valve seat member, are provided in a cylindrical main body case configuring a primary chamber connected to the condenser and a secondary chamber connected to the evaporator. The needle valve and a coil spring energizing toward the valve port are provided in the guide member. A blade member is provided on a boss portion of the needle valve. A blade of the blade member abuts on a cylindrical guide surface of the guide member to apply sliding resistance.

In a throttle device depressurizing and sending a refrigerant condensed by the condenser to the evaporator, hunting of a needle valve is prevented and hysteresis in differential pressure-flow rate characteristics in a high-pressure region is reduced. A valve seat member, in which a valve port is formed, and a cylindrical guide member, which is integral with the valve seat member, are provided in a cylindrical main body case configuring a primary chamber connected to the condenser and a secondary chamber connected to the evaporator. The needle valve and a coil spring energizing toward the valve port are provided in the guide member. A blade member is provided on a boss portion of the needle valve. A blade of the blade member abuts on a cylindrical guide surface of the guide member to apply sliding resistance.

Provide is a steering device capable of absorbing great impact force, a damper applicable to the steering device, and a flow control valve applicable to the damper. The steering device 100 includes a damper 120 between a rack bar 103 and a rack end 106. In the damper 120, an inner chamber 121 is formed at an outer peripheral portion of a socket main body 107, and an integral displacement body 130 is slidably fitted onto the outer peripheral portion. The integral displacement body 130 is, at an inner peripheral portion thereof, formed with a circular ring-shaped flow control valve 140. The flow control valve 140 is provided with a first flow control valve 150. The first flow control valve 150 includes a second flow body 156 that approaches or separates from a first flow body 153. In the second flow body 156, a second flow hole 157 is formed at a position shifted from a first flow hole 154 formed at the first flow body 153, and a second hole diameter restriction portion 158 is formed so as to close the first flow hole 154.

Provide is a steering device capable of absorbing great impact force, a damper applicable to the steering device, and a flow control valve applicable to the damper. The steering device 100 includes a damper 120 between a rack bar 103 and a rack end 106. In the damper 120, an inner chamber 121 is formed at an outer peripheral portion of a socket main body 107, and an integral displacement body 130 is slidably fitted onto the outer peripheral portion. The integral displacement body 130 is, at an inner peripheral portion thereof, formed with a circular ring-shaped flow control valve 140. The flow control valve 140 is provided with a first flow control valve 150. The first flow control valve 150 includes a second flow body 156 that approaches or separates from a first flow body 153. In the second flow body 156, a second flow hole 157 is formed at a position shifted from a first flow hole 154 formed at the first flow body 153, and a second hole diameter restriction portion 158 is formed so as to close the first flow hole 154.

A valve assembly that includes a valve housing and a valve body that is configured to be mated with the valve housing. The valve housing includes at least one window that extends through a wall of the valve housing, and the valve body includes at least one prong that is configured to mate with the window when the valve body is mated with the valve housing.

A valve assembly that includes a valve housing and a valve body that is configured to be mated with the valve housing. The valve housing includes at least one window that extends through a wall of the valve housing, and the valve body includes at least one prong that is configured to mate with the window when the valve body is mated with the valve housing.

A backflow prevention assembly includes a body forming two buckets, wherein flow passes through the body from an inlet to an outlet along an axis and consecutively through each of the buckets. A single zone test cover encloses a first of the buckets to form a single zone chamber. A dual zone test cover encloses a second of the buckets with a dual zone cartridge assembly therein. The dual zone test cover has two test cocks. The dual zone cartridge assembly includes a frame having a valve seat, wherein the frame includes a lumen providing fluid communication from a dual zone chamber upstream of the valve seat to a first of the two test cocks of the dual zone test cover, and wherein the second of the two test cocks of the dual zone test cover is in fluid communication with the dual zone chamber downstream of the valve seat.

A pressure relief valve is disclosed with a first stage valve that is in series with a second stage valve, with an enclosed cavity between the first stage valve and the second stage valve. The first stage valve relieves pressure from an enclosure into the enclosed cavity between the stages, when the pressure is above a cracking pressure of the first stage valve. The second stage relieves pressure from the enclosed cavity when the pressure is above the cracking pressure of the second stage valve.

A vent valve flow fuse includes a valve cap with a valve cap cavity defined by one or more valve cap interior surfaces. The vent valve flow fuse includes a valve body with a valve body cavity defined by one or more valve body interior surfaces. The vent valve flow fuse includes a poppet configured to at least partially fit within the valve cap cavity and the valve body cavity. The vent valve flow fuse includes a spring configured to fit within the valve body cavity and to generate a resistive force against the poppet. The poppet is in a first position when fluid having a first amount of fluid pressure enters the valve cap cavity from a vent valve and engages the poppet. The poppet is in a second position when fluid having a second amount of fluid pressure enters the valve cap cavity and engages the poppet.

A vent valve flow fuse includes a valve cap with a valve cap cavity defined by one or more valve cap interior surfaces. The vent valve flow fuse includes a valve body with a valve body cavity defined by one or more valve body interior surfaces. The vent valve flow fuse includes a poppet configured to at least partially fit within the valve cap cavity and the valve body cavity. The vent valve flow fuse includes a spring configured to fit within the valve body cavity and to generate a resistive force against the poppet. The poppet is in a first position when fluid having a first amount of fluid pressure enters the valve cap cavity from a vent valve and engages the poppet. The poppet is in a second position when fluid having a second amount of fluid pressure enters the valve cap cavity and engages the poppet.