To solve the above problem, a venting device inserted into a sealing part of a pouch of a secondary battery according to the present invention includes: a housing inserted between confronting surfaces of the sealing part and sealed together with the sealing part; an element made of a metal and disposed in the housing and through which a passage is defined providing gas communication between an inside and an outside of the pouch; and a ball disposed at an outlet-side of the passage, the ball configured to open and close the passage, wherein, in the element, an edge of an inner circumference of a surface of the outlet-side of the passage is chamfered or filleted so as to face the ball, and the element includes: a surface treatment layer formed on the chamfered or filleted surface; and a layer made of a polymer and fused to the surface treatment layer.

A valve including a closure member having a first portion and a second portion the first and second portions in fluid tight contact with one another when closed and spaced when open, a flow tube in operative contact with the closure member.

The present invention concerns a fluid stop valve unit comprising at least one fluid stop valve and a pressure responsive part, integrated or separate, arranged so that the at least one fluid stop valve is kept in a closed state. The pressure responsive part, integrated or separate, has an opening characteristic going from the closed state to an open state with a decrease of pressure after a threshold pressure has been reached.

The present invention concerns a fluid stop valve unit comprising at least one fluid stop valve and a pressure responsive part, integrated or separate, arranged so that the at least one fluid stop valve is kept in a closed state. The pressure responsive part, integrated or separate, has an opening characteristic going from the closed state to an open state with a decrease of pressure after a threshold pressure has been reached.

System and methods are configured to adjust fluid pressure within a barrier fluid system on a subsea fluid processing machine. More specifically, a barrier fluid pressure system is located at the subsea location and includes a barrier fluid pressure regulator module having one input communicating or being pressure matched with a process fluid flowline and a second input communicating with the barrier fluid pressure system. The pressure regulator module is configured to locally adjust the barrier fluid pressure depending upon the fluid process pressure.

A flow control valve sub including a tubular valve sub housing having a sub central passage and a valve cavity formed in a sidewall of the sub housing. At least one piston aperture and at least one constant area pilot aperture communicate between the valve cavity and the sub central passage, while a piston is positioned in the piston aperture with the piston moving to at least partially cover and uncover the flow port in order to create a variable flow path between the valve cavity and the sub central passage. A beam spring is supported at a location within the cavity on each side of the piston and biases the piston toward a less flow restrictive position relative to the flow port and a valve cover is positioned to substantially close the valve cavity.

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.

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.

An overpressure protective device for passively blocking flow of gas at a selected pressure setpoint includes a valve, a valve stem, and vacuum-filled bellows coupled to the valve stem. The vacuum-filled bellows are configured such that expansion and/or contraction of the bellows as a result of pressure changes present at the valve are harnessed to passively move the valve stem to operate the valve and block pressures higher than a preconfigured pressure setpoint. If the process pressure drops below the pressure setpoint, the overpressure protective device operates the valve to again permit flow of pressurized gas through the valve.