API 7K Mud Pump Rubber Pulsation Dampener Air Bladder for Oilfield Function: Reduce the drilling pump pressure fluctuations of instantaneous displacement change; Make the pump pressure smoothly, protect equipment from damage caused by severe vibration. Filled with nitrogen in the air or inert gas, in the absence of them,air can replace.But oxygen or combustible gasis forbidden. Inflation pressure is 20% ~ 30% of the maximum working pressure. The advanced filling pressure is 2