PVB-4APVB-4A½”- 2”½”- 2”

Modification OverviewModification Overview

Production of the PVB4A series began in Production of the PVB4A series began in 2008 and is current.2008 and is current.

Canopy RemovalCanopy Removal

The canopy is The canopy is secured by two secured by two screws.screws.

Bonnet RemovalBonnet Removal The bonnet is The bonnet is

threaded into the threaded into the body and sealed by body and sealed by an o-ring.an o-ring.

Unscrew the bonnet Unscrew the bonnet counter clockwise.counter clockwise.

There is no spring There is no spring load.load.

Note: If float spring is Note: If float spring is damaged, the bonnet damaged, the bonnet must be replaced.must be replaced.

Float Removal and ServiceFloat Removal and Service

The float is free once The float is free once the bonnet has been the bonnet has been removed.removed.

Replace the rubber Replace the rubber seal by pulling it from seal by pulling it from the groove on the the groove on the float.float.

Check Valve DisassemblyCheck Valve Disassembly

The check valve is The check valve is secured by the float secured by the float cage and sealed by an cage and sealed by an o-ring.o-ring.

Remove the float cage.Remove the float cage.

Push down and turn Push down and turn the spring retainer 90 the spring retainer 90 degrees.degrees.

Check Disc ReplacementCheck Disc Replacement

The check poppet is The check poppet is free once the spring free once the spring and retainer are and retainer are removed.removed.

The check disc is free The check disc is free once the retaining once the retaining screw and guide are screw and guide are removed.removed.

Check Seat ReplacementCheck Seat Replacement

The check seat is The check seat is pushed into the body pushed into the body and o-ring sealed.and o-ring sealed.

Simply pull the seat Simply pull the seat straight out of the straight out of the body.body.

Reassembly NotesReassembly Notes

Reassemble in Reassemble in reverse order.reverse order.

Lubricate bonnet Lubricate bonnet o-ring.o-ring.