Systems, methods, and apparatuses for mechanically securing a check valve in an open position during maintenance and testing operations. For example, there is a system including: a set rod having a first end and a second end, and a curved portion, in which the first end of the set rod is to be placed against a clapper inside the check valve; a first connecting nipple having a first end to thread into a ball drip outlet of the check valve and a second end to receive a rod locking component; the rod locking component having at least: (i) a first end to attach with the second end of the first connecting nipple, (ii) a second end, and (iii) a lock mechanism positioned in a center portion of the rod locking component to positionally fix the set rod in its position while placed against the clapper inside of the check valve; in which the first end of the set rod is to be positioned against the clapper inside the check valve, in which the set rod is fixed in its position by the lock mechanism of the rod locking component, and in which the set rod traverses through the ball drip outlet of the check valve into the first connecting nipple, through the first connecting nipple into the rod locking component, and egresses through the second end of the rod locking component. Other related embodiments are disclosed.

A device for holding a flap of a non-return valve in a closed position, which is configured to carry out hydraulic testing of a device or apparatus, includes a body which takes the form of a caliper with two arms that are articulated relative to each other, at a first of the two opposite ends thereof, about a first axis, in that it includes a holder articulated about the first axis and in that the two arms each has, at the second end thereof, a pad pivoting about axes that are parallel to the first axis.

A convertible check valve having a pair of valve body sections, each of which includes a central passageway extending through it is disclosed. Each passageway terminates at an elliptical port. A moveable flapper is located within the check valve between the valve body sections and is movable between a between a closed state and an opened state, and vice versa, to effect the selective closing and opening of the ports. The valve body sections are configured to be rotated 180 degrees with respect to each other so that they are in an either an axially aligned state or in an elbow state. The interface between the passageways is formed by two elliptical shaped planar surfaces, each extending at an angle of 45 degrees to the central axis of the associated passageway. The valve also includes a pressure relief assembly.

A rupture disc valve device as provided herein is configured to selectively release a pressurized material. In some embodiments, the rupture disc has a burst pressure rating less than a pressure of the pressurized material. The valve device selectively braces the rupture disc until release of the pressurized material is desired. To release the pressurized material, the valve device is configured to remove or adjust the bracing support to the rupture disc, allowing the pressurized material to burst the rupture disc.

A plumbing fixture fluid diversion assembly minimizes dripping from an outlet conduit of a spout body by restricting passage of accumulated fluid through the outlet conduit. The assembly comprises a hollow spout body having an inlet conduit that carries fluid to a diversion chamber. The diversion chamber is in communication with the inlet conduit and the outlet conduit. A routing notch helps control the flow of the fluid towards a chamber opening that is disposed between the diversion chamber and the outlet conduit. The chamber opening enables passage of fluid to the outlet conduit. A flap selectively covers and uncovers the chamber opening to control dripping from the outlet conduit. The assembly generates an initial force to at least partially urge the flap towards the chamber opening for covering by pulling a cable, displacing magnet proximal to the flap, or creating a vacuum to displace the flap.

Technologies are described herein for a check valve. The check valve can be operated using a lever and bellows system or an external magnet. External magnets external to the check valve move from a first position to open the check valve to a second position to close the check valve through the interaction of the magnetic fields of the external magnets and the internal magnet.

A compressor (10) for compressing air for a compressed air system of a motor vehicle has a cylinder housing (14) and a cylinder head (16) connected thereto. A compressor piston is moveable in oscillation up and down in a cylinder in the cylinder housing (14). A lamella (34, 36) is received in a depression (38) in an underside (30) of the cylinder head (16) facing the compressor piston. The delivery rate of the compressor (10) can be regulated by closing or opening a control channel (60, 60′) in the cylinder head (16) via the lamella. A bearing end (44) of the lamella (34, 36) is hinged in a pivotably guided manner on a bearing contour (54) of this depression (38). As a result, a separate bearing journal for pivotable mounting of the lamella (34, 36) on the cylinder head (16) may be omitted.

A refuel adapter, which may, among other things, be suitable for aircraft refueling includes a casing and a butterfly valve disposed within an interior of the casing. The butterfly valve includes a body defining an opening and a disc rotatable within the body about an axis of rotation to selectively close the opening. The disc includes at least one opening therethrough, and a first flap and a second flap are each rotatably attached to the disc to selectively cover a portion of the at least one opening. The butterfly valve may be movable between (i) a static position in which the disc and the first and second flaps are in a closed position, (ii) a refuel position in which the disc may be in a closed position and the flaps are in an open position, and (iii) a defuel position in which the disc may be in an open position.

A check valve (1) which comprises an obturator (2) and a biasing mechanism, the biasing mechanism arranged to urge the obturator towards a closed condition, and the check valve further comprising an actuator assembly (5, 7a, 7b) which is arranged to be selectively activated to cause the obturator to be in an open condition, and the check valve comprising a controller which has a control signal input to cause the controller to selectively activate the actuator assembly.

A check valve can include a pressure actuator or an electromagnetic actuator. The check valve includes a valve inlet, a valve outlet, and flap disposed between the valve inlet and the valve outlet. The pressure actuator in fluid communication with the valve inlet. The check valve has an open state and a closed state. The check valve is configured to allow an input gas to flow from the valve inlet to the valve outlet when the check valve is in the open state. The check valve is configured to preclude the input gas from flowing from the valve inlet to the valve outlet when the check valve is in the closed state. Upon actuation of the pressure actuator or the electromagnetic actuator, the flap moves away from the valve inlet to allow the inlet gas to move from the valve inlet to the valve outlet.