Dresser Ashcroft 2-1106D (175-1) Pulsation Dampener

Ashcroft 1106D Pulsation Dampener is a compact, metal-bodied device designed to shield pressure gauges and instrumentation from sudden pressure spikes and pulsations in industrial fluid systems. It achieves damping with a moving pin that traverses one of five predrilled holes, providing adjustable restriction; the pin is shipped in the middle hole and the design offers a self-cleaning action as pressure moves the pin, allowing reliable use in challenging pulsating environments. The unit can be mounted in either vertical or horizontal orientations and is rated for pressures up to 5000 psi. Wetted components for the 1106D variant are steel and stainless steel, with process/instrument connections available as 1/4" NPT male (02) or 1/2" NPT male (04) depending on ordering code. Typical applications include protecting pressure gauges and related instrumentation from pulsating or rapidly fluctuating pressures, such as those produced by reciprocating pumps or other pulsating sources. The 1106 family is documented by Ashcroft as a small, throttling dampener used to tame pulsations in instrument lines, and is commonly paired with ancillary components like the 1112 pressure snubber for additional filtration or damping if required. This particular model—often referenced in catalogs and listings as 1106D—provides the steel/stainless wetted configuration and the available ¼ or ½ NPT connections that match common instrumentation practices in industrial settings.