The Additel ADT920N High Pressure Test Pump, 3,000 psi, 1/4 NPT (F) - Air are hand operated pressure pumps designed to generate pressure from 95% vacuum to 3,000 psi (200 bar). With a long lever, it takes just 40 seconds to reach 3,000 psi (200 bar). A quality screw press is designed for fine pressure adjustment, with an adjustment resolution up to 10 Pa (0.1 mbar). A specially designed shut-off valve makes the pressure as stable as possible during calibration. A built-in gas-liquid isolator protects the pump from moisture and dirt to reduce the need for maintenance. The residual liquid in the pump introduced from devices under test will be pushed out and collected during pressure release. Two hand-tight quick connectors installed on the pump allow easy connecting and disconnecting to the test pump without the need for PTFE tape or wrenches. The ADT920-N is an ideal comparison test pump for pressure instruments calibration.