... .5. Noise: when the equipment is in normal working condition, test the noise on the place 1m far from the pressure reducing valve ... control valve, throttle valve and so on.3. Safety system: safety valve, check valve and so on.4. Accessories: globe valve, bimetal thermometer ... valve, syphon, joint,flange, gasket, nut, screw bolt and so on. Steam Desuperheaters