PRESSURE RELIEF VALVE

摘要

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.

主权项

1. A pressure relief valve for pressure equalization between an essentially closed space and an surrounding atmosphere, said pressure relief valve includes a valve housing comprising:
a wall defining a flow passage with an upwardly oriented outflow passage, a valve body arranged to cooperate with a valve seat arranged in said outflow, said valve body having an outer surface geometry configured for collecting a flow of gas that flows through said outflow passage and around said valve body to form an upwardly oriented jet, a stem configured for axial guidance of said valve body in and out of said valve seat, a damper arranged to dampen axial movement of said valve body, wherein said damper constitutes a bellow damper arranged to encircle said stem and said bellow damper is arranged to dampen the movement of said valve body by applying dampening force to said valve body via said stem when said pressure relief valve is open.