Daughtridge Sales Co., Inc. specializes in pulsation dampeners, pressure gauges, thermometers and related items. Ashcroft pulsation dampeners threads onto a gauge socket and provides restriction by means of a moving pin, which may be placed in either of five different sized holes, and thus allows the user to vary the amount of dampening to suit requirements. The pulsating pressure moves the pin up and down, providing a self-cleaning action. The pulsation dampeners are shipped with a pin in the 'middle' hole, and may be used in either a vertical or horizontal position. If you have any comments or questions concerning our products or services including our pulsation dampeners feel free to call us at 1-800-967-7507.