A valve pressure assembly for pressurizing an actuating mechanism of a thief hatch is provided. The valve pressure assembly includes a pressure bar comprising a first end, a second end, and a body located between the first end and the second end; a connector coupled to the body and configured to removably couple to the actuating mechanism; and a clamp coupled to at least one of the first end and the second end, the clamp comprising a fastener removably coupled to the relief valve, wherein the fastener is configured to adjustably move the pressure bar and the connector in contact with the actuating mechanism to facilitate pressuring the actuating mechanism to remain in an operative position.

A valve pressure assembly for pressurizing an actuating mechanism of a thief hatch is provided. The valve pressure assembly includes a pressure bar comprising a first end, a second end, and a body located between the first end and the second end; a connector coupled to the body and configured to removably couple to the actuating mechanism; and a clamp coupled to at least one of the first end and the second end, the clamp comprising a fastener removably coupled to the relief valve, wherein the fastener is configured to adjustably move the pressure bar and the connector in contact with the actuating mechanism to facilitate pressuring the actuating mechanism to remain in an operative position.