| 摘要 |
The invention described in the specification relates to a two-way relief valve which may be attached to fuel vessels and conduits to relieve pressure or vaccum in the vessels or conduits. The valve contains a valve body defining a cavity, means for attaching the valve to a vessel or conduit and inlet and exit ports on the valve body open to the cavity. The inlet and exit ports contain closure elements or valve members and bias means therefor which are resiliently biased to resist opening of the closure elements. In use, the valve promotes the reduction in vaporization of volatile fluids from a storage vessel or conduit thereby reducing pollution caused by the escape of vapors from the vessel or conduit and allows the flow of fluids into the vessel or conduits to reduce damage to the vessel or conduit caused by excessive vacuum. |
