Abstract

A pressure relief valve for pressure equalization between an essentially closed space and the surrounding atmosphere is disclosed. The pressure relief valve includes a valve housing with:—a wall defining a flow passage with an upwardly oriented outflow,—a valve body arranged to cooperate with a valve seat arranged in the outflow,—a stem configured for axial guidance of the valve body,—a damper arranged to dampen axial movement of the stem, wherein the damper is configured such that force curves of compression and expansion respectively diverge due to hysteresis loss or pronounced hysteresis loss.

IPC Classes  ?

• F16K 1/54 - Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
• F16K 17/12 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side weight-loaded
• F16K 24/04 - Devices, e.g. valves, for venting or aerating enclosures for venting only
• F16K 1/38 - Valve members of conical shape

Abstract

a flow constriction defining an essentially truncated conically shaped interior and arranged to encircle the lifting element such that a radial passage between the lifting element and flow constriction increase when the lifting element and the valve body is moved from a closed state of the pressure relief valve towards an open state of the pressure relief valve.

IPC Classes  ?

• F16K 17/12 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side weight-loaded
• F16K 31/08 - Operating meansReleasing devices electricOperating meansReleasing devices magnetic using a magnet using a permanent magnet
• F16K 24/04 - Devices, e.g. valves, for venting or aerating enclosures for venting only
• B65D 90/32 - Arrangements for preventing, or minimising the effect of, excessive or insufficient pressure
• B65D 90/34 - Venting means

Abstract

A pressure relief valve for pressure equalization between an essentially closed space and the surrounding atmosphere is disclosed. The pressure relief valve includes a valve housing with: –a wall defining a flow passage with an upwardly oriented outflow, –a valve body arranged to cooperate with a valve seat arranged in the outflow, –a stem configured for axial guidance of the valve body, –a damper arranged to dampen axial movement of the stem, wherein the damper is configured such that force curves of compression and expansion respectively diverge due to hysteresis loss or pronounced hysteresis loss.

IPC Classes  ?

• F16K 17/12 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side weight-loaded
• F16K 24/04 - Devices, e.g. valves, for venting or aerating enclosures for venting only

Abstract

A pressure relief valve (1) for pressure equalization between an essentially closed space and the surrounding atmosphere is disclosed. The pressure relief valve includes a valve housing (10) with: • - a cylindrical wall defining a flow passage (50), • - a valve body (20) arranged to cooperate with a valve seat (25) arranged in the outflow (51) of the valve housing, • - a stem (30) configured for axial guidance of the valve body, • - a lifting element (40) or plate arranged further down in the flow passage relative to the valve seat, • - a flow constriction (60) defining an essentially truncated conically shaped interior and arranged to encircle the lifting element such that a radial passage (61) between the lifting element and flow constriction increase when the lifting element and the valve body is moved from a closed state of the pressure relief valve towards an open state of the pressure relief valve.

IPC Classes  ?

• F16K 17/12 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side weight-loaded
• F16K 24/04 - Devices, e.g. valves, for venting or aerating enclosures for venting only
• B65D 90/34 - Venting means
• F16K 31/08 - Operating meansReleasing devices electricOperating meansReleasing devices magnetic using a magnet using a permanent magnet