A fluid control system to control fluid flow within a drainage system is disclosed that includes a cage configured to couple an interior wall of a structure of the drainage system, wherein the cage at least partially surrounds an aperture of the interior wall, and a float device configured to be encapsulated within the cage, wherein while in a resting state, the float device at least partially covers an aperture of the structure of the drainage system. In some instances, when fluid contacts the float device at a flow rate of at least a flow threshold, the float device is configured to at least partially uncover the aperture of the interior wall, or further uncover the aperture of the interior wall. The float device may be formed from a buoyant material and configured to rise from the resting state in accordance with a rising fluid level within the structure.

A gas check valve device having a header, at least one check valve plunger, at least one orifice that provides a first path for a small amount of gas to pass through the at least one check valve plunger when a respective compression spring presses the check valve plunger against a check valve seat to form an air tight seal, and a common gas passage connecting the check valve plunger with a common outlet. The gas check valve device provides a second path for a small amount of gas to pass through the orifice of the at least one check valve plunger in a reverse direction and a larger amount of the gas to pass between the at least one check valve plunger and the check valve seat when the gas pressure compresses the respective compression spring to separate the check valve plunger from the check valve seat.

A gauge for a hybrid pressure and flowgauge regulator includes first indicia and second indicia. The first indicia provides an indication of a flow rate of a gas exiting an outlet of the hybrid pressure and flowgauge regulator when the gas exits with a pressure below a gauge threshold pressure. The second indicia provides an indication of the pressure of the gas exiting the outlet of the hybrid pressure and flowgauge regulator when the pressure of the gas exiting the outlet is above the gauge threshold pressure.

A flow regulating valve and a compressor with the flow regulating valve are disclosed. The flow regulating valve includes: a valve seat in which a passage is formed to allow fluid to enter; a guide member protruded outwards from the valve seat; a piston which is disposed on the outside of the valve seat, forms a fluid inlet with the valve seat, and is capable of being reciprocated along the guide member; and a biasing member biasing the piston in a direction away from the valve seat. A force exerted by the incoming fluid on the piston is opposite in direction to a biasing force exerted by the biasing member on the piston. The piston is able to be moved to different positions under the action of different forces to form fluid inlets of different widths with the valve seat, thereby controlling the mass flow rate of the incoming fluid (especially liquid). With the technical solutions of the present invention, the flow rate of the fluid entering the compressor can be effectively adjusted with a simple structure and low cost.

A fluid control system to control fluid flow within a drainage system is provided that includes a fluid control device configured to couple to an interior wall of a cylindrical structure of the drainage, and a coupling mechanism configured to couple the fluid control device to the interior wall, wherein, while in a resting state, the fluid control device is configured to at least partially cover an aperture of the interior wall. When fluid contacts the fluid control device at a flow rate of at least a flow threshold, the fluid control device is configured to at least partially uncover the aperture of the interior wall. The fluid control device has a spherical shape, wherein a diameter of the fluid control device has a diameter that is greater than or equal to a diameter of the aperture.

A fluid control system to control fluid flow within a drainage system is provided that includes a fluid control device configured to couple to an interior wall of a cylindrical structure of the drainage, and a coupling mechanism configured to couple the fluid control device to the interior wall, wherein, while in a resting state, the fluid control device is configured to at least partially cover an aperture of the interior wall. When fluid contacts the fluid control device at a flow rate of at least a flow threshold, the fluid control device is configured to at least partially uncover the aperture of the interior wall. The fluid control device has a spherical shape, wherein a diameter of the fluid control device has a diameter that is greater than or equal to a diameter of the aperture.

The invention relates to a non-return valve with a valve sleeve, comprising a valve seat and a flow opening and a sealing body moveable in the valve sleeve, comprising a bulged sealing face, wherein the bulged sealing face is arranged at a head end of the sealing body and the non-return valve comprises guiding means for the axial guidance of the sealing body in the valve sleeve, so that the sealing face always faces the valve seat, and a locking element is inserted into the valve sleeve through the flow opening and is fixed therein, so that the locking element restricts the movement of the sealing body in the valve sleeve.

A pressure compensation device for compensating an internal pressure in a housing of an electrochemical device includes: at least one gas-permeable membrane for gas exchange between an interior of the housing and surroundings of the electrochemical device; and a valve body that can be transferred from a home position resting on a valve seat into a use position remote from the valve seat, the valve body including a gas throughflow opening that is sealed by the gas-permeable membrane.

A gauge for a hybrid pressure and flowgauge regulator includes first indicia and second indicia. The first indicia provides an indication of a flow rate of a gas exiting an outlet of the hybrid pressure and flowgauge regulator when the gas exits with a pressure below a gauge threshold pressure. The second indicia provides an indication of the pressure of the gas exiting the outlet of the hybrid pressure and flowgauge regulator when the pressure of the gas exiting the outlet is above the gauge threshold pressure.

A waterless trap for use in a drain assembly includes flow enhancing features to promote the vortex water flow of water received in the trap, an improved sealing arrangement to enhance the seal between a seal member and the housing to inhibit sewer gas leaks from an attached drain pipe by maintaining an evaporation barrier that assists in retaining water in a corresponding p-trap, and a plurality of air passages can allow the trap seal to open with ease when the drain pipe is pressurized. These features may be used in combination with one another or may be independently employed.