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Safety Valve Checkout (Valve Tester) The safety valve checkout is an off-line model that simulates safety valve operation and raises the internal pressure to the safety valve take-off, as well as shows the safety valve take-off via a pressure gauge on the unit Pressure device. Can check the safety valve take-off pressure (also known as opening pressure, setting pressure) seal test pressure. Scope: For direct load and pilot-operated safety valve setting pressure, back seat pressure and tightness and other performance tests.