Testing tool for gas pressure regulator Elster M2R Adjustment tool with thread M32 x 1.5 Test tool for the safety shut-off valve (SSV) of a gas pressure regulator (GDR), for example of the type Elster M2R. The test requires a controlled pressure increase in the downstream pipeline system in order to test the upper response pressure or shut-off point of the SSV. Material: aluminium Pa = 50 -130 mbar An adjustment spindle is additionally required.