SailNet Community - View Single Post - Dripless vs Flax Stuffing Boxes
View Single Post
  #8  
Old 09-23-2009
RichH's Avatar
RichH RichH is offline
Senior Member
 
Join Date: Jul 2000
Location: Pennsylvania
Posts: 2,799
Thanks: 9
Thanked 69 Times in 62 Posts
Rep Power: 15
RichH will become famous soon enough
The traditional STUFFING BOX
Cons: needs periodic adjustment, needs smooth shaft surface to work well (no burrs, no galling or anyother shaft surface irregularities). Shaft should be removed and 'dressed' by a machinist when replacing packing.
Pros: can be packed (temporarily) with virtually any 'lubricated rope' that fits when in a dire emergency ... and still affect a 'seal' with the propshaft turning.
Inexpensive to operate. Technology is over 200 years old; therefore, quite reliable. Easy DIY changeout of packing.
Better pros: can be packed with braided PTFE (Gore-tex) for 'virtually dripless' operation.
Cheap, even when using GFO packing.
Virtually Dripless Packing by Gore GFO


SHAFT SEAL .....
Cons: CANNOT be fixed/adjusted while underway. If it fails while underway, you usually must stop the leak by 'draconian methods' ... and that all stop the shaft seal from working thus you cant use the engine. Those that have 'auxiliary' water cooling need to be 'occasionally burped' - installation of the high-speed seal requires careful 'precision'.
Expensive
Pros: dry bilge.
Reply With Quote Share with Facebook