COMPRESSION FITTING MAINTENANCE

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COMPRESSION FITTINGMAINTENANCE
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FITTING INSTALLATION

• INSERT TUBE THROUGH NUT AND FERRULE/S TO TUBE
  STOP
• CHECK FERRULE ORIENTATION (opt)
• TIGHTEN NUT TO FINGER TIGHT
• MARK NUT AND BODY HEX (opt)
• ADVANCE NUT 1 1/4 TURNS (sizes 4-16) 3/4 TURNS
  (sizes 1, 2 3)

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(No Transcript)
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FITTING REMAKE

• MARK BODY AND NUT POSITION
• DISASSEMBLE FITTING
• BOTTOM TUBE AND FERRULES IN BODY
• ADVANCE NUT TO ORIGINAL POSITION
• ADVANCE NUT (1/12 TURN or LESS)
• SUDDEN TORQUE RISE LAST 1/4 TURN

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Twin Ferrule
Body Seal
Tube Seal
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Twin Ferrule
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Twin Ferrule
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Scratched Tubing
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Twin Ferrule
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Single Ferrule
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Single Ferrule
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Single Ferrule
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TUBE STICK FACTORS

• THIN WALL TUBING
• SOFT TUBING
• DULL TUBE CUTTER
• EXCESSIVE OD DEBURR
• OVERMAKE OF FITTING
• LARGE TUBE OD
• MULTIPLE REMAKES
• FITTING TOLERANCES

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GAP GAUGE

• INDICATES UNDER-MAKE
• DOES NOT MEASURE TUBE INSERTION DEPTH
• GOOD FOR INITIAL MAKE ONLY
• PRESETTING ADDS ERROR
• SOME MEASURE OF TUBE RETENTION
• NOT A MAKE UP GAUGE