Method and device for testing the response pressure of a safety valve on site

For the testing of the response pressure of a safety valve on site, a force acting in its opening direction is continuously increased up to the response of the safety valve, which is acoustically perceptible by means of medium flowing out, so that a pressure can be determined at this instant with reference to the valve sealing area and directly indicated as response pressure, taking into account the pressure measured separately upstream of the safety valve. The device used for this purpose has a connection disc on the valve side and a support disc, which are connected to a frame by means of connecting rods, a coupling apparatus which can be brought into engagement with the safety valve and is connected to a lifting apparatus held on the frame side and acting in the opening direction of the safety valve, to which lifing apparatus a force measuring cell is assigned, and an apparatus to measure the pressure upstream of the valve. The lifting apparatus has an intermediate piece (4) on the support disc (2) with a thrust bearing (7) for a hand-actuable screw spindle (6) which is in threaded engagement with a lifting sleeve (6) guided axially displaceably in the intermediate piece (4), the lifting sleeve being connected, for its part, to a mounting (11, 12, 13) for the force measuring cell (14) carrying the coupling apparatus (16, 17, 18). An indicating apparatus (21) is coupled to the force measuring cell (14) and the apparatus (20) to measure the pressure upstream of the safety valve.