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Vibration Absorbers

Packless vibration absorbers are designed for installation in the suction and discharge lines of air conditioning and refrigeration systems to dampen the transmission of compressor-induced vibration through system piping.

Packless vibration absorbers are recognized under the component programs of Underwriter's Laboratories for application on both suction and discharge lines.

Packless vibration absorbers are compatible with all HFC, HCFC & CFC refrigerants.

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Stainless Steel VAFS Models

The Packless VAFS line of improved vibration absorbers are electrically welded with no braze joints for improved strength and reliability and designed for use with modern high pressure refrigerants. All VAFS models are manufactured with stainless steel flexible tubing and stainless steel braids.

Model ━ Connection (ID) ▲ Length ━ Working Pressure Burst Pressure
VAFS-3 38 in    9.5 mm 8 14 in    209.6 mm 650 psig    45 bar 3250 psig    224 bar
VAFS-4 12 in    12.7 mm 9 in    228.6 mm 650 psig    45 bar 3250 psig    224 bar
VAFS-5 58 in    15.9 mm 9 34 in    247.7 mm 650 psig    45 bar 3250 psig    224 bar
VAFS-6 34 in    19.1 mm 10 12 in    266.7 mm 650 psig    45 bar 3250 psig    224 bar
VAFS-7 34 in    19.1 mm 11 14 in    285.8 mm 650 psig    45 bar 3250 psig    224 bar
VAFS-8 78 in    22.2 mm 11 12 in    292.1 mm 650 psig    45 bar 3250 psig    224 bar
VAFS-9 1 18 in    28.6 mm 13 in    330.2 mm 650 psig    45 bar 3250 psig    224 bar
VAFS-10 1 38 in    34.9 mm 14 34 in    374.7 mm 650 psig    45 bar 3250 psig    224 bar
VAFS-11 1 58 in    41.3 mm 17 in    431.8 mm 650 psig    45 bar 3250 psig    224 bar
VAFS-12 2 18 in    54.0 mm 20 in    508.0 mm 650 psig    45 bar 3250 psig    224 bar
VAFS-13 2 58 in    66.7 mm 24 in    609.6 mm 460 psig    32 bar 2300 psig    159 bar
VAFS-14 3 18 in    79.4 mm 27 in    685.8 mm 380 psig    26 bar 1900 psig    131 bar

Brass VAF Models

The classic Packless VAF models with a proven track record for quality and reliability. The VAF standard sizes are produced from red brass flexible tubing and bronze braids while the large sizes use stainless steel.

Model ━ Connection (ID) ▲ Length ━ Working Pressure Burst Pressure
VAF-1 14 in    6.4 mm 7 in    177.8 mm 660 psig    46 bar 3300 psig    228 bar
VAF-2 14 in    6.4 mm 7 12 in    190.5 mm 660 psig    46 bar 3300 psig    228 bar
VAF-3 38 in    9.5 mm 8 14 in    209.6 mm 620 psig    43 bar 3100 psig    214 bar
VAF-4 12 in    12.7 mm 9 in    228.6 mm 620 psig    43 bar 3100 psig    214 bar
VAF-5 58 in    15.9 mm 9 34 in    247.7 mm 620 psig    43 bar 3100 psig    214 bar
VAF-6 34 in    19.1 mm 10 in    254.0 mm 620 psig    43 bar 3100 psig    214 bar
VAF-7 34 in    19.1 mm 11 14 in    285.8 mm 620 psig    43 bar 3100 psig    214 bar
VAF-8 78 in    22.2 mm 11 12 in    292.1 mm 620 psig    43 bar 3100 psig    214 bar
VAF-9 1 18 in    28.6 mm 13 in    330.2 mm 540 psig    37 bar 2700 psig    186 bar
VAF-10 1 38 in    34.9 mm 14 34 in    374.7 mm 540 psig    37 bar 2700 psig    186 bar
VAF-11 1 58 in    41.3 mm 17 in    431.8 mm 500 psig    34 bar 2500 psig    172 bar

Technical Details

Packless vibration absorbers are constructed of deep pitch corrugated tubing for increased flexibility and vibration absorption, covered by high tensile wire braid for superior strength. The vibration absorbers have female copper end connections for making sweat connections to refrigerant piping.

Each vibration absorber is pressure tested and then carefully vacuum tested using a highly sensitive helium mass spectrometer leak detection device. Units are cleaned, dehydrated and sealed in plastic film after final inspection to maintain cleanliness and dryness prior to installation. These are available either in bulk or individually boxed.

Packless can customize the length and type of end connection for the vibration absorber to meet the individual needs of your application. Contact us today to discuss how we can help with your requirements.

Installation Notes

  • Install as close to the compressor or vibration source as possible.
  • Always install perpendicular to the major axis of vibration.
  • Anchor the refrigerant line or piping to a solid member near the end of the vibration absorber furthest from the vibration source (see diagram).
  • Ensure there is sufficient space to minimize static compression and tension of the vibration absorber after soldering.
  • Only install vibration absorbers in a straight line; they are not designed to compensate for offset piping.
  • Be careful when making the sweat connection to avoid disturbing the braze joints on VAF models which have a melting point of 1625 °F.
  • Always direct torch flames away from the body of the vibration absorber (and away from your own body).
  • Clean excess flux or other chemicals from the unit to prevent corrosion.
  • Never use chlorides with the stainless steal VAFS models as doing so can cause corrosion and failure of the vibration absorber.