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PVB-4A ½”- 2” - PowerPoint PPT Presentation


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PVB-4A ½”- 2”. Modification Overview. Production of the PVB4A series began in 2008 and is current. Canopy Removal. The canopy is secured by two screws. Bonnet Removal. The bonnet is threaded into the body and sealed by an o-ring. Unscrew the bonnet counter clockwise.

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Pvb 4a 2
PVB-4A½”- 2”


Modification overview
Modification Overview

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


Canopy removal
Canopy Removal

  • The canopy is secured by two screws.


Bonnet removal
Bonnet Removal

  • The bonnet is threaded into the body and sealed by an o-ring.

  • Unscrew the bonnet counter clockwise.

  • There is no spring load.

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


Float removal and service
Float Removal and Service

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

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


Check valve disassembly
Check Valve Disassembly

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

  • Remove the float cage.

  • Push down and turn the spring retainer 90 degrees.


Check disc replacement
Check Disc Replacement

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

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


Check seat replacement
Check Seat Replacement

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

  • Simply pull the seat straight out of the body.


Reassembly notes
Reassembly Notes

  • Reassemble in reverse order.

  • Lubricate bonnet o-ring.