Service
Bladder Failure
Normal life for bladders can be from a few months to several years, depending upon the harshness of the application. Below are common reasons for failed bladders or bellows:
DChemical attack: Check chemical compatibility charts. Consult your Graco distributor.
DCut bladder or bellows: Check for sharp objects that may have been introduced into the surge suppressor through pumped fluid.
DInsufficient compressed air charge in surge sup- pressor during operation: See Charging and Startup on page 8.
DSurge suppressor too small for the pump: An undersized surge suppressor will have premature bladder failure. Contact your Graco distributor for assistance in ensuring that you have the correct size surge suppressor.
Replacing Bladder or Bellows
1.Relieve the pressure.
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 7.
2.Remove the clamp band, ring flange, or bolts.
3.Remove the top housing of the surge suppressor.
4.Remove the old bladder or bellows, and replace it with the new bladder or bellows.
Make sure that you properly orient the parts:
D Install rubber bladders with the concave side facing the top housing, as shown in the Parts Drawings on page 14.
D Install PTFE bellows with the concave side facing the bottom housing, as shown in Model No. 239126 in the Parts Drawings on
page 15. Install the PTFE encapsulated fluo- roelastomer
5.Replace the top housing of the surge suppressor.
6.Replace the clamp band, ring flange, or bolts, and torque according to the torque specifications in the Torque Table on page 11.
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