Wilden® 2" (51 mm) Equalizer® Surge Dampener SD Series for Air-Operated Double-Diaphragm (AODD) Pumps

The 2" (51 mm) Wilden® Equalizer® Surge Dampener SD minimizes unwanted pressure fluctuations by providing a supplementary pumping action to virtually eliminate pressure variation and pulsation on Air-Operated Double-Diaphragm (AODD) Pumps. It has a flow-through design manufactured with existing Wilden pump parts. The SD series automatically sets and maintains the correct air pressure required optimizing its effectiveness.

6SD2 Surge Dampener



Available Materials, Wetted Housing

Aluminum, Stainless Steel, Cast Iron or Polypropylene

Available Materials, Air Components

Air Regulator Body: Polypropylene, Aluminum, Nickel Plated Aluminum or Stainless Steel
Air Chamber: Aluminum, Nickel Plated Aluminum, Teflon®-Coated Aluminum, Cast Iron or Stainless Steel



FDA (Food & Drug Administration)

EHEDG (European Hygienic Equipment Design Group)
EHEDG Certification


USP (United States Pharmacopeia)

ATEX (ATmosphere EXplosible)
Wilden ATEX Product Summary


It is only natural that the worldwide leading producer of air-operated, double-diaphragm pumps complies with the ATEX 100A directive for explosive atmospheres. The European community and their safety are of utmost importance to us. We take responsibility for not only our product, but also for the supporting documentation and compliance of necessary directives. Wilden is proud to introduce our metallic X pumps that comply with ATEX 94/9/EC Group I, category M2 and Group II, category 2 zones G & D. Our plastic X pumps comply with ATEX 94/9/EC Group II, category 2, zone G.