An aerosol delivery device having a check valve therein for use with refilling the aerosol delivery device is provided. The aerosol delivery device may comprise at least one housing defining a refillable reservoir for storing an aerosol precursor composition, and a heating element contained within the at least one housing and configured to activate and vaporize components of the aerosol precursor composition. A connector may be coupled to the at least one housing and sealably connectable with a container of aerosol precursor composition for refilling the reservoir. The connector may include a check valve configured to enable only a one-way flow of aerosol precursor composition from the container into the reservoir when the connector is sealably connected with the container.

An aerosol delivery device having a check valve therein for use with refilling the aerosol delivery device is provided. The aerosol delivery device may comprise at least one housing defining a refillable reservoir for storing an aerosol precursor composition, and a heating element contained within the at least one housing and configured to activate and vaporize components of the aerosol precursor composition. A connector may be coupled to the at least one housing and sealably connectable with a container of aerosol precursor composition for refilling the reservoir. The connector may include a check valve configured to enable only a one-way flow of aerosol precursor composition from the container into the reservoir when the connector is sealably connected with the container.

A self-acting pressure activated drain valve includes at least one inlet configured to receive a fluid. A drainage passage delivers the fluid to at least one outlet where the fluid is expelled. The self-acting pressure activated drain valve further includes a flexible diaphragm configured to operate in an open position and a closed position based on a pressure. The flexible diaphragm is normally biased in the open position such that fluid is delivered from the at least one inlet to the at least one outlet via the drainage passage. The pressure, however, initiates the closed position such that air is prevented from flowing through the drainage passage.

A self-acting pressure activated drain valve includes at least one inlet configured to receive a fluid. A drainage passage delivers the fluid to at least one outlet where the fluid is expelled. The self-acting pressure activated drain valve further includes a flexible diaphragm configured to operate in an open position and a closed position based on a pressure. The flexible diaphragm is normally biased in the open position such that fluid is delivered from the at least one inlet to the at least one outlet via the drainage passage. The pressure, however, initiates the closed position such that air is prevented from flowing through the drainage passage.

A method for determining a state variable of a valve diaphragm of a motor-driven diaphragm valve includes the following steps: a) in a first time range: moving the valve diaphragm in such a way that the diaphragm valve changes from a first state into a second state; in the process b) detecting at least one reference value of a variable which is associated with the movement process of the valve diaphragm; c) in a second time range: moving the valve diaphragm in such the way that the diaphragm valve changes from the first state into the second state; in the process d) detecting at least one operating value of the variable which is associated with the movement process of the valve diaphragm; e) comparing the at least one reference value with the at least one operating value or variables acquired therefrom; and f) determining the state variable from the result of the comparison.

A method for determining a state variable of a valve diaphragm of a motor-driven diaphragm valve includes the following steps: a) in a first time range: moving the valve diaphragm in such a way that the diaphragm valve changes from a first state into a second state; in the process b) detecting at least one reference value of a variable which is associated with the movement process of the valve diaphragm; c) in a second time range: moving the valve diaphragm in such the way that the diaphragm valve changes from the first state into the second state; in the process d) detecting at least one operating value of the variable which is associated with the movement process of the valve diaphragm; e) comparing the at least one reference value with the at least one operating value or variables acquired therefrom; and f) determining the state variable from the result of the comparison.

A first on-off valve 2 and a second on-off valve 3 each are a two-port valve. A first passage block 5 is provided with a first on-off valve-corresponding inflow passage 11 and a first on-off valve-corresponding outflow passage 12. A second passage block 6 is provided with a second on-off valve-corresponding inflow passage 14 and a second on-off valve-corresponding outflow passage 15. The second on-off valve-corresponding outflow passage 15 is in communication with an upstream side portion of the first on-off valve-corresponding outflow passage 12 via a communicating passage 13 formed in the first passage block 5. An orifice 20 is provided between the second on-off valve-corresponding outflow passage 15 and the communicating passage 13.

A first on-off valve 2 and a second on-off valve 3 each are a two-port valve. A first passage block 5 is provided with a first on-off valve-corresponding inflow passage 11 and a first on-off valve-corresponding outflow passage 12. A second passage block 6 is provided with a second on-off valve-corresponding inflow passage 14 and a second on-off valve-corresponding outflow passage 15. The second on-off valve-corresponding outflow passage 15 is in communication with an upstream side portion of the first on-off valve-corresponding outflow passage 12 via a communicating passage 13 formed in the first passage block 5. An orifice 20 is provided between the second on-off valve-corresponding outflow passage 15 and the communicating passage 13.

Provided is a cap for a handwheel that opens and closes a valve, capable of being readily attached to the handwheel without requiring a large space around the handwheel. The cap has easily switchable two working modes: One is a co-rotation mode where the cap is capable of rotating with the handwheel and the other is an independent rotation mode where the cap is capable of rotating independently of the handwheel. The cap has an internal casing to be securely fitted to the handwheel; an external casing being rotatable around its axis and having the internal casing in an interior thereof; a clutch for connecting the external casing with the internal casing and for disconnecting the former from the latter; and a maintaining member for keeping the external casing rotatable independently of the internal casing when they are disconnected by the clutch.

Provided is a cap for a handwheel that opens and closes a valve, capable of being readily attached to the handwheel without requiring a large space around the handwheel. The cap has easily switchable two working modes: One is a co-rotation mode where the cap is capable of rotating with the handwheel and the other is an independent rotation mode where the cap is capable of rotating independently of the handwheel. The cap has an internal casing to be securely fitted to the handwheel; an external casing being rotatable around its axis and having the internal casing in an interior thereof; a clutch for connecting the external casing with the internal casing and for disconnecting the former from the latter; and a maintaining member for keeping the external casing rotatable independently of the internal casing when they are disconnected by the clutch.