The BDT45 is an adjustable pulsation protection accessory against sudden pressure pulsations and surges. It is adjustable by means of a throttle screw. The screw closes or opens the open flow in the device so that the fluctuations are dampened. Adjustment of the setting is possible during operation. This enables sensing instruments to provide consistent readings, while extending product service life. The pulsation dampener is often supplied assembled to the pressure gauge. It is not to be used in combination with diaphragm seal.