Abstract: A pressure relief apparatus including a housing, a valve disposed in the housing, the valve having a first shoulder, a retainer disposed between the housing and the valve spool, the retainer having a second shoulder, a biasing member disposed between the first and second shoulders, and a metallic seal interface between the housing and the valve. The valve may be constructed with no dynamic elastomeric seals to reduce hysteresis.

Abstract: A coupling assembly is provided that includes a first coupling member removably securable in an apparatus having a port that includes a receiving groove, a retaining surface and a resilient locking member receivable in the receiving groove. The first coupling member includes a body extending along an axis from a leading portion configured for receipt within the port of the apparatus to a trailing portion configured to releasably connect the first coupling member to a second coupling member. The body includes a rib having a ramp tapering outwardly in a direction way from the axis and a shoulder tapering inwardly toward the axis. The coupling member and port are sized such that upon insertion of the first coupling member into the port, the resilient locking member travels up the ramp and then contracts becoming trapped between the shoulder and the retaining surface to secure the first coupling member to the apparatus.