A bleed valve includes a valve housing defining an inlet and an outlet with a flow path for fluid communication from the inlet to the outlet. A poppet head is connected to the valve housing by a primary spring and a secondary spring. The poppet head is configured for movement relative to the valve housing between: a fully open position in which the poppet head is spaced apart from the inlet to allow flow through the flow path, with the primary spring and secondary spring both expanded; a partially closed position in which the poppet head is spaced apart from the inlet but is closer to the inlet than in the fully open position, with the primary spring compressed; and a fully closed position in which the poppet head seats against the valve housing blocking flow through the flow path, with the primary spring and the secondary spring both compressed.

A bleed valve includes a valve housing defining an inlet and an outlet with a flow path for fluid communication from the inlet to the outlet. A poppet head is connected to the valve housing by a primary spring and a secondary spring. The poppet head is configured for movement relative to the valve housing between: a fully open position in which the poppet head is spaced apart from the inlet to allow flow through the flow path, with the primary spring and secondary spring both expanded; a partially closed position in which the poppet head is spaced apart from the inlet but is closer to the inlet than in the fully open position, with the primary spring compressed; and a fully closed position in which the poppet head seats against the valve housing blocking flow through the flow path, with the primary spring and the secondary spring both compressed.

A control device for a valve device can detect open/close state of the valve device without using limit switches. The valve device includes a diaphragm for opening and closing a flow path for flowing a fluid, a coil spring for biasing the diaphragm in the closing direction of flow path, a main actuator for driving it against the biasing force of the coil spring, and an adjusting actuator using a piezoelectric element for adjusting the opening degree of the flow path determined by the diaphragm. The controller detects the open/close state of flow path based on the voltage generated by the piezoelectric element of the adjusting actuator, and controls valve device using the detection signal.

A system for regulating fluid flow having a processor configured to reduce image noise is provided. The system includes an image sensor to capture an image of the drip chamber and a valve to regulate the fluid flowing from the drip chamber to a patient. The processor captures the image of the drip chamber using the image sensor, performs an edge detection on the image to generate a first processed image, and performs an AND-operation on a pixel on a first side of an axis of the first processed image with a corresponding mirror pixel on a second side of the axis of the first processed image to generate a second processed image.

Apparatuses for controlling gas flow are important components for delivering process gases for semiconductor fabrication. In one embodiment, an apparatus for controlling gas flow is disclosed, the apparatus delivering two gas flows at a known ratio. Specifically, the apparatus has first and second on/off valves and first and second flow restrictors. The first and second on/off valves may be altered between an open state and a closed state. When both the first and second on/off valves are in an open state, first and second gas flows are delivered to first and second outlets. The first and second gas flows are provided at a known ratio to one another, this ratio determined by the ratio of the resistance to flow of the first and second flow restrictors.

Apparatuses for controlling gas flow are important components for delivering process gases for semiconductor fabrication. In one embodiment, an apparatus for controlling gas flow is disclosed, the apparatus delivering two gas flows at a known ratio. Specifically, the apparatus has first and second on/off valves and first and second flow restrictors. The first and second on/off valves may be altered between an open state and a closed state. When both the first and second on/off valves are in an open state, first and second gas flows are delivered to first and second outlets. The first and second gas flows are provided at a known ratio to one another, this ratio determined by the ratio of the resistance to flow of the first and second flow restrictors.

A safety valve (1) has a first valve, and a second valve, a magnetic armature (3) moved by voltage applied to a coil (2). Movement of the armature (3) acts against a spring force of the first valve spring (5) and loosens the first valve body (4) from the first valve seat (6). The movement of the armature (3) subsequently acts against a spring force of the second valve spring (8) and loosens the second valve body (7) from the second valve seat (9). This frees a valve opening for a flowthrough of the gas flow. The flowthrough amount of the gas flow through the valve opening can be continuously controlled as a function of the voltage applied to the coil (2) between a closed position and a fully open position even in partially open positions.

A safety valve (1) has a first valve, and a second valve, a magnetic armature (3) moved by voltage applied to a coil (2). Movement of the armature (3) acts against a spring force of the first valve spring (5) and loosens the first valve body (4) from the first valve seat (6). The movement of the armature (3) subsequently acts against a spring force of the second valve spring (8) and loosens the second valve body (7) from the second valve seat (9). This frees a valve opening for a flowthrough of the gas flow. The flowthrough amount of the gas flow through the valve opening can be continuously controlled as a function of the voltage applied to the coil (2) between a closed position and a fully open position even in partially open positions.

A device and method for dispensing a flowable medium which is an adhesive, a hot glue or a hot melt adhesive. The device has a housing with an interior space and a rod mounted in the housing, wherein the rod is movable by means of an actuator between a first end position and a second end position in an axial direction. The device comprises a diaphragm, wherein the rod passes through the diaphragm, wherein the diaphragm is mounted in a sealed manner in the housing radially on the outside and is mounted in a sealed manner in the rod radially on the inside, wherein the diaphragm divides the interior space into a first cavity and a second cavity and separates the first cavity from the second cavity in a fluid tight manner, and wherein the first cavity serves to hold the flowable medium. The device has at least one channel which opens into the first cavity and through which the flowable medium can flow into the first cavity, and a dispensing opening into the first cavity for dispensing the flowable medium, wherein the rod has a sealing section, and wherein the sealing section closes the dispensing opening in the first end position and is arranged at a distance from the dispensing opening in the second end position. A pressure medium acting on the diaphragm is arranged in the second cavity.