Phoenix Contact A and AD Type Valve Plugs with Additional Holes Phoenix Contact is adding four additional holes within the sealed area of Type A and AD valve plugs, having no influence on technical data and IP rating. These holes will be used to catch an additional gasket on the valve plug. The additional gasket (silicone) will be available as accessory and can be used if there are special sealing requirements under tough conditions. During transition of the changes, both versions of this product may be supplied depending on inventory. Please contact a Mouser Technical Sales Representative for further information. 5-0813-30