Abstract: A data management system includes a chassis metalwork that is electrically conductive. The chassis metalwork is electrically coupled to the power supply to form a return power path. The return power path may include a sub-chassis frame and a drawer frame. The return power path may also include uninsulated return power cables. The return power cables may be maintained in a cable chain along with outgoing power cables and data cables. The return power cables may be coupled to the drawer frame and the sub-chassis frame.

Abstract: A data management system includes a chassis metalwork that is electrically conductive. The chassis metalwork is electrically coupled to the power supply to form a return power path. The return power path may include a sub-chassis frame and a drawer frame. The return power path may also include uninsulated return power cables. The return power cables may be maintained in a cable chain along with outgoing power cables and data cables. The return power cables may be coupled to the drawer frame and the sub-chassis frame.

Abstract: A safety relief valve is provided that comprises a body comprising a chamber therein and an inlet and an outlet, the inlet comprising an inlet valve seat; a disk member closable on the inlet valve seat; and a mechanism in the body biasing the disk member to rest on the inlet valve seat with a set force such that when the pressure in the inlet exceeds a set pressure resulting from the set force, the disk member is lifted from the inlet valve seat, the mechanism comprising a combination of a coil spring and one or more disk springs stacked in series with the coil spring. A method of preparing a coil spring for use in a pressure relief valve comprises measuring the spring rate of the coil spring and; modifying the spring so as to modify its spring rate to be within ±2% of a desired spring rate.

Abstract: A safety relief valve is provided that comprises a body comprising a chamber therein and an inlet and an outlet, the inlet comprising an inlet valve seat; a disk member closable on the inlet valve seat; and a mechanism in the body biasing the disk member to rest on the inlet valve seat with a set force such that when the pressure in the inlet exceeds a set pressure resulting from the set force, the disk member is lifted from the inlet valve seat, the mechanism comprising a combination of a coil spring and one or more disk springs stacked in series with the coil spring. A method of preparing a coil spring for use in a pressure relief valve comprises measuring the spring rate of the coil spring and; modifying the spring so as to modify its spring rate to be within ±2% of a desired spring rate.

Abstract: A safety relief valve is provided that comprises a body comprising a chamber therein and an inlet and an outlet, the inlet comprising an inlet valve seat; a disk member closeable on the inlet valve seat; and a mechanism in the body biasing the disk member to rest on the inlet valve seat with a set force such that when the pressure in the inlet exceeds a set pressure resulting from the set force, the disk member is lifted from the inlet valve seat, the mechanism comprising a combination of a coil spring and one or more disk springs stacked in series with the coil spring. A method of preparing a coil spring for use in a pressure relief valve comprises measuring the spring rate of the coil spring and; modifying the spring so as to modify its spring rate to be within ±2% of a desired spring rate.

Abstract: A safety relief valve is provided that comprises a body comprising a chamber therein and an inlet and an outlet, the inlet comprising an inlet valve seat; a disk member closable on the inlet valve seat; and a mechanism in the body biasing the disk member to rest on the inlet valve seat with a set force such that when the pressure in the inlet exceeds a set pressure resulting from the set force, the disk member is lifted from the inlet valve seat, the mechanism comprising a combination of a coil spring and one or more disk springs stacked in series with the coil spring.

Abstract: A snap-type safety relief valve is provided that is designed for use under specified operating conditions on a pressure vessel or a flow line having a pressurized gas therein.

Abstract: A snap-type safety relief valve is provided that is designed for use under specified operating conditions on a pressure vessel or a flow line having a pressurized gas therein.