Provided is a pressure regulator and a fuel pump module having the same, which may be easily assembled by including fewer components, the pressure regulator including: a first housing including a guide part positioned therein and guiding movement of a valve, and an outlet part communicating with an inner space thereof and discharging a fluid; a second housing coupled to the first housing, having a valve accommodating space, including a valve seating part, and including an inlet part introducing a fluid; a valve positioned in the valve accommodating space, and moved to thus open and close a fluid flow; and an elastic member interposed between the valve and the first housing to bring the valve into close contact with the valve seating part.

According to embodiments, a pressure relief mechanism comprises a case with an installation hole formed therein, and a pressure relief valve. The pressure relief valve comprises an insertion portion which comprising a vent path formed in an axial portion of the insertion portion and a slit formed in a peripheral wall portion of the insertion portion so as to communicate with the vent path, a pedestal portion provided at an outer end of the insertion portion, a locking portion provided at an inner end of the insertion portion and locked on an inner edge of the installation hole, and a ring-like seal member interposed between around the installation hole and the pedestal portion, the seal portion comprising an elastic member.

A pressure relief valve for a battery pack is attached to a port formed in a pack case of a battery pack. The pressure relief valve has a casing including a discharge hole and a valve mechanism configured to open and close the discharge hole. The discharge hole is connected to the port when the pressure relief valve is attached to the port. The pressure relief valve includes a cover attached to the casing. A passage is formed between the cover and the casing to release gas that is discharged from the discharge hole. The valve mechanism includes a valve member configured to close the discharge hole and a biasing portion that biases the valve member to a closed position where the valve member closes the discharge hole.

Provided is a pressure regulator and a fuel pump module having the same, which may be easily assembled by including fewer components, the pressure regulator including: a first housing including a guide part positioned therein and guiding movement of a valve, and an outlet part communicating with an inner space thereof and discharging a fluid; a second housing coupled to the first housing, having a valve accommodating space, including a valve seating part, and including an inlet part introducing a fluid; a valve positioned in the valve accommodating space, and moved to thus open and close a fluid flow; and an elastic member interposed between the valve and the first housing to bring the valve into close contact with the valve seating part.

Device (1) for closed systems for equalization of pressure surges, having an outlet nozzle (2), on which an impact plate (3) is provided and a hinged cover (4) is mounted pivotably, wherein the hinged cover (4) lies in a rest position (5) on the outlet nozzle (2) and in an open position (6) bears on the impact plate (3), wherein at least one holding-closed device (7) is provided, which presses the hinged cover (4) in the rest position (5) against the outlet nozzle (2) and in the case of a pressure surge releases the hinged cover (4), wherein the device has a control unit (8) that controls the holding-closed device (7).

According to embodiments, a pressure relief mechanism comprises a case with an installation hole formed therein, and a pressure relief valve. The pressure relief valve comprises an insertion portion which comprising a vent path formed in an axial portion of the insertion portion and a slit formed in a peripheral wall portion of the insertion portion so as to communicate with the vent path, a pedestal portion provided at an outer end of the insertion portion, a locking portion provided at an inner end of the insertion portion and locked on an inner edge of the installation hole, and a ring-like seal member interposed between around the installation hole and the pedestal portion, the seal portion comprising an elastic member.

According to embodiments, a pressure relief mechanism comprises a case with an installation hole formed therein, and a pressure relief valve. The pressure relief valve comprises an insertion portion which comprising a vent path formed in an axial portion of the insertion portion and a slit formed in a peripheral wall portion of the insertion portion so as to communicate with the vent path, a pedestal portion provided at an outer end of the insertion portion, a locking portion provided at an inner end of the insertion portion and locked on an inner edge of the installation hole, and a ring-like seal member interposed between around the installation hole and the pedestal portion, the seal portion comprising an elastic member.

A pressure relief valve comprises a base attachable to the pressure vessel at a vessel aperture, the base comprising a base face, the base face facing away from the vessel; a cap comprising a cap face, the cap face facing towards the vessel, the cap movable between an open position and a closed position, wherein in the closed position the cap seals the vessel aperture and in the open position flow through the vessel aperture is permitted to relieve pressure in the pressure vessel; and a gasket between the base face and the cap face, wherein in the closed position: the base face and the cap face contact the gasket at a first location to form a first seal; and the base face and the cap face contact the gasket at a second location to form a second seal.

Device (1) for closed systems for equalization of pressure surges, having an outlet nozzle (2), on which an impact plate (3) is provided and a hinged cover (4) is mounted pivotably, wherein the hinged cover (4) lies in a rest position (5) on the outlet nozzle (2) and in an open position (6) bears on the impact plate (3), wherein at least one holding-closed device (7) is provided, which presses the hinged cover (4) in the rest position (5) against the outlet nozzle (2) and in the case of a pressure surge releases the hinged cover (4), wherein the device has a control unit (8) that controls the holding-closed device (7).

A hydraulic overpressure valve (1) is provided comprising a valve housing (2), a valve seat (3) located in said valve housing and having a seat center and a seat center axis (4), a cone element (5) movable relatively to said valve seat (3), said cone element (5) having a cone (6) protruding at least partly into said valve seat (3) and having a cone center axis (4), and force generating means acting on said cone element (5) in a direction towards said valve seat (3). Such a hydraulic overpressure valve should be operated with low noise. To this end said cone (6) is movable along a path of movement in which said cone center axis is kept outside said seat center axis (4).