Pressure Actuated Fills (PAF) Manholes – Cover Page & Part # Code

Betts offers an extensive line of Pressure Actuated Fills and Manholes to meet a wide variety of venting applications. The Pressure Actuated Fill (PAF) satisfies the requirements of the primary pressure relief system for a cargo tank and can either be a standalone 10” fill style or an integral part of a 16” or 20” clamp ring style manhole cover.

A representative part numbering system is used for the PAF line. Each letter or digit in the part number is indicative of a feature or option as shown in the chart. If an option is not covered by the standard numbering system, a three-digit suffix will apply. All options and part number combinations may not be listed, available or even possible. See individual product catalog pages or contact a Betts representative for assistance.