Abstract:
This disclosure relates to a proportional valve arrangement for refrigerant, with a valve housing having a valve body chamber, a valve body which is arranged within the valve body chamber and configured to be transferable between a first position and a second position. The valve housing includes a first sealing seat and a second sealing seat, and the valve body which is transferable between the first sealing seat and the second sealing seat.
Abstract:
A multi-way valve includes a control pressure channel, first and second control fluid channels, a valve body in the first and second control fluid channels, and an electrically controlled device having a drive member and an armature. The armature moves back and forth by the drive member between inactive and active positions. Movement of the armature from the inactive to the active position displaces the valve body arrangement to an active position, closing the first and opening the second control fluid channel is open. The electrically controlled device includes a drive body connected to the armature and a first spring member between the armature and the drive body. The valve body arrangement is biased towards the inactive position by a second spring member. The armature in the inactive position is biased towards the active position by a third spring member. Also disclosed is an actuator including the valve.
Abstract:
The invention relates to a bypass valve (1), in particular for an expansion machine (104) of a waste heat recovery system (100). The bypass valve (1) has a housing (2) with a valve chamber (9) formed therein. An inlet (3), an expander outlet (4) and a bypass outlet (5) are formed in the housing (2), which feed into the valve chamber (9). A closing element (6) is moveably arranged in the valve chamber (9). A valve seat (11) is formed on the housing (2). The closing element (6) cooperates with the valve seat (11) in order to open and close a first hydraulic connection from the inlet (3) to the expander outlet (4). A control valve (8) opens and closes a second hydraulic connection from the inlet (3) to the bypass outlet (5). The control valve (8) forms a first throttle point (21) in an open position. A second throttle point (22) is arranged between the valve chamber (9) and the bypass outlet (5). The control valve (8), the second throttle point (22) and the closing element (6) border a control chamber (9a). The first throttle point (21) has a greater flow cross-section than the second throttle point (22).
Abstract:
A multi-way valve includes a control pressure channel, first and second control fluid channels, a valve body in the first and second control fluid channels, and an electrically controlled device having a drive member and an armature. The armature moves back and forth by the drive member between inactive and active positions. Movement of the armature from the inactive to the active position displaces the valve body arrangement to an active position, closing the first and opening the second control fluid channel is open. The electrically controlled device includes a drive body connected to the armature and a first spring member between the armature and the drive body. The valve body arrangement is biased towards the inactive position by a second spring member. The armature in the inactive position is biased towards the active position by a third spring member. Also disclosed is an actuator including the valve.
Abstract:
A ball valve includes a valve body that delimits a sealing seat, a ball seat and at least three fluidic ducts that converge in the ball seat. A hollow ball is received in the ball seat and is movable to allow/prevent fluidic communication between the fluidic ducts. At least one of at least two sealing elements is placed into the sealing seat in abutment with the ball. Only one of the ducts acts as an introduction duct of the sealing element and of the hollow ball inside the valve body, to position the sealing element and hollow ball into their respective seats. A ball-compressing element delimits a further sealing seat to receive the other sealing element and is connected to the introduction duct of the valve body to press the element against the ball. A manufacturing method makes the ball valve.
Abstract:
The new valve incorporates a poppet or spool that covers one of two ports at one position, and then switches to cover another port at a second position. In each of the two positions, it separates the covered port from a third port, and connects this third port with the uncovered port, and it reverses the connections at the second position. To ensure high speed of response, the poppet or spool has lowest possible mass and consequently inertia, it switches between the two positions in short stroke by the action of an actuator, and returns by the action of the liquid (or the gas in other applications) high pressure that could provide high displacing force, or by a spring, or by both. The high pressure is applied to two nearly equal areas at the two sides of the poppet or spool, and thus two merits are gained: the actuator force should overcome the force of the pressure applied only on a small differential area instead of a large area, and the poppet or spool thicknesses can be reduced to reduce the mass and consequently the inertia. As special case, two ports of the valve can be used instead of three, and the third one can be connected to a high pressure source to be used as pilot pressure for fast returning of the poppet. It could continuously connect or separate between any two ports at both working positions with any pattern of connections. The valve can be used to control pressurized gases in other industrial control applications in the same way it is used in hydraulic control systems, but with materials suitable for the application.
Abstract:
A safety valve device as for use with a compressed gas cylinder and/or a control valve comprising a housing unit, a plug with controlled bleed off channels bored into the plug, an actuator, and an actuating rod, which is designed to engage in the event that a control valve is severed from a compressed gas cylinder, at least partially sealing the opening formed in the compressed gas cylinder from the severing of the control valve, and achieving a safer, controlled bleed off of the compressed gas contained therein.
Abstract:
A valve and valve assembly having a hybrid valve member are provided. The valve includes a housing, with an inlet, a primary outlet, and a secondary outlet. The hybrid valve member is rotatably positioned within the housing. The hybrid valve member has a fully closed position wherein the hybrid valve member prevents flow between the inlet and the primary outlet and prevents flow between the inlet and the secondary outlet. The hybrid valve member includes a planar portion and a hemispherical portion on a first side thereof. The planar portion faces the inlet in the fully closed position and the hemispherical portion faces the secondary outlet in the fully closed position.
Abstract:
The invention relates to an electromagnetic valve for distributing cryogenic propellant for a space launch vehicle. The valve comprises two seats each oriented in a direction opposite to the other seat; a passage connecting the seats; and two shutters opening and closing the seats. The valve also comprises a magnetic circuit with a magnetic coil and a magnetic plunger that is driven by the magnetic flux of the coil and which in turn drives the shutters relative to their respective seats so as to open and close the seats. The plunger is placed between the shutters such that each shutter closes its seat by moving the plunger away from the corresponding seat. The movement for opening a seat is performed by moving the plunger towards the seat so that it does not crush the shutters against their seats.