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CHAPTER 6.2 (FLUID CONDUCTORS AND SEALS) - Coggle Diagram
CHAPTER 6.2
(FLUID CONDUCTORS AND SEALS)
fluid flow through distribution system consist of conductors and fittings, carry fluid from reservoir through operating components back to reservoir.
TYPES OF SEALS AND CONFIGURATION
Function
to prevent excessive internal and external leakage and to keep out contamination
Common types of sealing devices :
Piston cup packings
Gaskets
Rings
Piston Rings
Wiper rings
Compression packings ( V- and U-shapes)
TYPES OF CONDUCTORS
Ability to :
Sufficient size to pass fluid without excessive pressure lost
Withstand vibration and thermal expansion
Not produce excessive restriction to the flow
Steel Tubing
Plastic Tubing
Steel Pipes
Flexible Hoses
Depends on system's operating pressure and flow rates.
Sizing Of Pipes
Fluid flow resistance resulting from fluid movement
Produce heat, may cause problems
Lower the work output of a system
Specified by nominal bore diameter ( Inner diameter). Outer diameter depends on wall thickness of wall.
Future maintenance must cosidered to easy on removing components for service
When designing hydraulic system
when Installing hydraulic system
TUBING AND HOSES
Hose
Made out of :
M iddle layer of reinforcing material for strength
Inner tube to conduct fluid
Outer protective coating to withstand abrasion and abuse
Fittings
Types of fitting in hydraulic system :
45° flare fitting
37° flare fitting
straight thread "O" ring connector
ferrule compression fitting
"O" ring compression fitting
sleeve compression fitting
Crucial on selection:
to allow easier system maintenance
to improve system efficiency
to control construction cost
Tubes
thin-walled, semi-rigid conductor. Can bent and shaped
Specified by outer diameter, bore diameter depends on wall thickness