Pressure Test Unit For BOP Or High Pressure Testing Pump Characteristic and Advantages - Specially suitable to the high pressure tests and ultra-high pressure tests in the field or in the workshop - Standstill of the pump when reaching the setting pressure - No energy consumption in case of long pressure holding times - No dissipated heat during the pressure holding phase - No risk for explosion and spark in oil and gas field due to air-operated pump - Substitute of leakage by automatic re-delivery through the pump - Regulator to control inlet air supply, then to adjust working pressure - High pressure relief valve for protection - Easy to install, move, use and maintain - All piping and fittings are stainless steel for long lifespan