ASME Accumulators

Maximum Working Pressure - 450 psig

asme-accumulators.jpgASME accumulators are used to prevent liquid slugging of the compressor during a flood-back condition. If liquid enters the compressor cylinder, costly damage can occur. Our accumulators capture excess liquid leaving the evaporator, allowing the system to vaporize it during normal operation, returning only refrigerant vapor to the compressor. A weep hole is included in the internal tube to facilitate proper oil return from the accumulator to the operating system.

The accumulator must be placed between the evaporator and compressor to intercept the excess liquid. To size the accumulator, you must select the model with the tonnage nearest to the tonnage of the operating system. Care must also be taken to evaluate the amount of liquid holding capacity needed. We recommend the holding capacity not be less than 50% of the system charge. The minimum tonnage is the lowest capacity that will provide for adequate oil return from the accumulator. While these are general guidelines, it is the responsibility of the system designer to select and apply the accumulator properly. Contact us for help in selecting the proper model.

Features

  • Low pressure drop
  • Positive oil return
  • Powder painted finish to protect the accumulator during condensation
  • 450 psig maximum working pressure

Consult Westermeyer Industries for custom sizes, including heat exchanger models.

DiameterCRN
8-5/8" M3495.5C
10-3/4" M3492.5C
12-3/4" M3491.5C
14" M4353.567890134YTN
16" M4297.5C
20" D08060.678901345YTN / U8190.2
Catalog NumberHolding Cap. (lbs of R-22)ODS Conn. SizeDimensions
AB
A8-15 29 1-5/8 8.625" 22
A8-21 29 2-1/8 8.625" 22
A10-21 43 2-1/8 10.75" 22
A10-25 43 2-5/8 10.75" 22
A10-31 48 3-1/8 10.75" 25
A12-31 72 3-1/8 12.75" 25
A14-41 115 4-1/8 14" 34
A16-41 135 4-1/8 16" 36
A20-41 276 4-1/8 20" 45
asme-accumulators-2.gif
Catalog NumberRecommended Tons of Refrigeration at Evaporator Temperature °F
R-22
-40°F-20°F0°F20°F40°F
MinMaxMinMaxMinMaxMinMaxMinMax
A8-15 1.12 5 1.4 8 2.3 12.5 2.5 19 5 28
A8-21 2 12 4 18 5 27 7 41 10 60
A10-21 2 12 4 18 5 27 7 41 10 60
A10-25 4 17 6 27 8 41 10 62 14 90
A10-31 6 25 9 40 12 61 15 92 20 132
A12-31 6 25 9 40 12 61 15 92 20 132
A14-41 12 37 20 61 31 96 47 145 68 210
A16-41 12 37 20 61 31 96 47 145 68 210
A20-41 12 37 20 61 31 96 47 145 68 210
Catalog NumberRecommended Tons of Refrigeration at Evaporator Temperature °F
R-404A
-40°F-20°F0°F20°F40°F
MinMaxMinMaxMinMaxMinMaxMinMax
A8-15 1.12 4 1.5 7.8 2.5 12.5 3.5 19 2 25
A8-21 2 10 3 17 5 28 8 42 12 65
A10-21 2 10 3 17 5 28 8 42 12 65
A10-25 3 15 5 25 8 41 13 63 19 97
A10-31 5 22 8 38 12 61 19 94 29 143
A12-31 5 22 8 38 12 61 19 94 29 143
A14-41 11 35 19 59 31 96 48 148 73 225
A16-41 11 35 19 59 31 96 48 148 73 225
A20-41 11 35 19 59 31 96 48 148 73 225

For pump-down capacities in R-404A, multiply the R-22 holding capacity by .90.