With these kits and parts, the elastomer seals and some common wear parts in the basic valve portion of the assemblies can be repaired. On severely worn or damaged valves, additional parts may be required.

The basic valve portion kits do not contain any parts for the mechanical operator portions of the valve. The mechanical operator portion of the valves should be repaired when necessary, with individually selected parts and tested before being put into service. Refer to Service Bulletin B4-75.01 for additional parts information and service instructions for the Type 'D' PILOTAIR® valve.

Minor repair kits contain seals, seal retainers and a grease tube. Major repair kits contain the minor repair kit plus a stainless steel spool.