Belleville seal for valve seat having a tear drop laminar flow feature

A fire-protection system for delivering a fire-control fluid, the fire-protection system comprising:

• a valve having a body with a fluid aperture having an aperture axis, and a fluid-flow axis parallel to a direction of flow of fluid through the fluid aperture;
• a seal member supportable to close the fluid aperture, the seal member having a blocking position and orientation, the seal member preventing a fluid flow through the aperture in a pre-activation condition of the fire-protection system when in the blocking position and orientation, the seal member being movable from the blocking position and orientation to a fluid-flow position orientation in an activated condition of the fire-protection system, the seal member comprising:
• a Belleville washer having a washer axis;
• and
• a support body comprising:
• a leading portion oriented in an upstream direction with respect to the fluid flow when the seal member is in the fluid-flow position and orientation;
• a trailing portion oriented in a downstream direction with respect to the fluid flow when the seal member is in the fluid-flow position and orientation;
• a transverse surface supporting the Belleville washer and oriented with the washer axis aligned with the aperture axis in the blocking position and orientation and with the washer axis at an angle to the fluid-flow axis when the seal member is in the fluid-flow position and orientation,
• the support body being streamlined with respect to the direction of fluid flow when the seal member is in the fluid-flow position and orientation.