A method for using a pre-assembled coupling assembly, the method including providing a pipe fitting defining an inner end and an outer end, the pipe fitting defining an axis; axially inserting the inner end of the pipe fitting into a gasket, a portion of the pipe fitting within the gasket positioned radially outward from a portion of the gasket; and assembling a housing around the gasket, the housing and the gasket forming a coupling, the coupling retained on the inner end of the pipe fitting when the coupling is in a relaxed position.

A thermal management system for a hybrid vehicle includes an expander, a heat exchanger, a condenser, a water tank, a pump, a heat exchanger for a battery pack, a heat exchanger for a motor, a water cooling jacket for an engine, an exhaust gas heat exchanger for an engine, a valve, and so on. According to the present disclosure, in thermal management loops, different operating modes of the system can be switched by controlling the open-close and opening of the valve. In this way, a series/parallel connection of thermal management branches of an electrical system and an engine system is fulfilled to meet the requirements for heat dissipation and preheating, and flux in each branch is regulated to fulfill thermal management according to different driving conditions of a hybrid vehicle.

A thermal management system for a hybrid vehicle includes an expander, a heat exchanger, a condenser, a water tank, a pump, a heat exchanger for a battery pack, a heat exchanger for a motor, a water cooling jacket for an engine, an exhaust gas heat exchanger for an engine, a valve, and so on. According to the present disclosure, in thermal management loops, different operating modes of the system can be switched by controlling the open-close and opening of the valve. In this way, a series/parallel connection of thermal management branches of an electrical system and an engine system is fulfilled to meet the requirements for heat dissipation and preheating, and flux in each branch is regulated to fulfill thermal management according to different driving conditions of a hybrid vehicle.

A check valve for preventing reverse flow of jettable material within a jettable material firing chamber during a firing event includes a free-floating plug. The check valve further includes at least one holding post, wherein the free-floating plug is arranged between at least one wall of the firing chamber and the holding posts, the at least one wall and the holding posts restricting the movement of the free-floating plug within the chamber.

A check valve for preventing reverse flow of jettable material within a jettable material firing chamber during a firing event includes a free-floating plug. The check valve further includes at least one holding post, wherein the free-floating plug is arranged between at least one wall of the firing chamber and the holding posts, the at least one wall and the holding posts restricting the movement of the free-floating plug within the chamber.

The present application relates to a safety valve, in particular a safety valve which can be released by manual operation and automatic operation. The safety valve comprising: valve body having an inlet, an outlet and a releasing port; and valve core being movable within the valve body between a close position in which the inlet communicates with the outlet and an open position in which the inlet communicates with the releasing port, the valve core comprises a resilient member which biases the valve core to the close position; wherein the position of the valve core can be manually or automatically controlled such that the valve core is able to switch between the close position and the open position, fluid flows from the inlet to the outlet in the close position and flows from the inlet to the releasing port in the open position.

A valve structure for a respirator includes a base, an upper cover, a membrane and a discharge device, wherein an outer side of an upper annular wall of the upper cover is provided with multiple L-shaped engagement blocks, and a combination hole of the discharge device is provided with multiple L-shaped engagement blocks embedded with the L-shaped engagement blocks of the upper annular wall, so that the discharge device is combined with the upper cover.

A valve structure for a respirator includes a base, an upper cover, a membrane and a discharge device, wherein an outer side of an upper annular wall of the upper cover is provided with multiple L-shaped engagement blocks, and a combination hole of the discharge device is provided with multiple L-shaped engagement blocks embedded with the L-shaped engagement blocks of the upper annular wall, so that the discharge device is combined with the upper cover.

A sprinkler configured for engagement with a coupling, the sprinkler including a raised lip end; and a distal end disposed opposite from the raised lip end, the sprinkler defining a raised lip between the distal end and the raised lip end, the sprinkler defining a groove between the raised lip and the distal end.

A sprinkler configured for engagement with a coupling, the sprinkler including a raised lip end; and a distal end disposed opposite from the raised lip end, the sprinkler defining a raised lip between the distal end and the raised lip end, the sprinkler defining a groove between the raised lip and the distal end.