High Pressure Centrifugal Oil Separators
Maximum Working Pressure - 675 psig
High pressure centrifugal oil separators are designed to remove large quantities of oil at a wide range of operating capacities. Field tests have shown these oil separators are up to 99% effective—even in high oil loading conditions. For screw compressor applications, a high pressure oil separator/reservoir without internal float valve must be used. Select an oil separator based on the system's tonnage under normal operating conditions. This is the capacity or compressor(s) BTUs based on refrigerant gas at the saturated suction and condensing temperatures of the operating system. For optimum sizing, select an oil separator with a capacity closest to the system's load at evaporating temperature. Minimum tonnage is 30% of the rated capacity. For refrigerants and conditions not listed, see our sizing calculator or contact Westermeyer Industries for assistance.
Features
- Welded design for higher strength
- Nitrogen tested for cleanliness
- Powder paint finish
- 675 psig maximum working pressure
| Catalog Number (Sealed units) | ODS Conn. Size | Dimensions | Max. Capacity in Tons of Refrigeration | Maximum Discharge (CFM) | Precharge Amount (oz.) | ||||
|---|---|---|---|---|---|---|---|---|---|
| A | B | C | D | CO2 | R-410A | ||||
| -20°F | +40°F | ||||||||
| OSH4-04C | 1/2 | 4" | 13" | 3" | 3.5" | 5 | 3 | 1.5 | 15 |
| OSH4-05C | 5/8 | 4" | 15" | 3" | 3.5" | 17 | 10 | 5 | 15 |
| OSH4-07C | 7/8 | 4" | 17" | 3" | 4" | 25 | 16 | 7.5 | 15 |
| OSH4-11C | 1-1/8 | 4" | 19" | 3" | 4" | 33 | 21 | 10 | 15 |
| OSH4-13C | 1-3/8 | 6" | 15" | 4.5" | 5" | 43 | 27 | 13 | 40 |
| OSH4-15C | 1-5/8 | 6" | 17" | 4.5" | 5" | 57 | 35 | 17 | 40 |
All capacities shown for R-410A are based on 100°F condensing temperature.
All capacities shown for CO2 are based on 20°F condensing temperature.
Discharge CFM Sizing Chart
Example of Use
Find the DCFM value for the refrigerant being used at the appropriate evaporating and condensing temperature. Then, multiply this value by the system tonnage at the operating conditions. Use this value to select an oil separator with the nearest maximum DCFM value to the calculated DCFM.
i.e. R-134A, 20 Tons @ 20F/110F = 1.02 DCFM. Total DCFM = 20.40 (20 tons x 1.02 DCFM)
For refrigerants and conditions not listed, see our sizing calculator or contact Westermeyer Industries for assistance.
| Evaporating Temperature |
||||||||||
| -40°F | -30°F | -20°F | -10°F | 0°F | 10°F | 20°F | 30°F | 40°F | ||
| R-134A Condensing Temperature | 80°F | 1.60 | 1.56 | 1.52 | 1.48 | 1.45 | 1.42 | 1.39 | 1.36 | 1.33 |
|---|---|---|---|---|---|---|---|---|---|---|
| 90°F | 1.44 | 1.40 | 1.37 | 1.33 | 1.30 | 1.27 | 1.24 | 1.22 | 1.19 | |
| 100°F | 1.31 | 1.27 | 1.24 | 1.21 | 1.17 | 1.15 | 1.12 | 1.09 | 1.07 | |
| 110°F | 1.20 | 1.17 | 1.13 | 1.10 | 1.07 | 1.04 | 1.02 | 0.99 | 0.97 | |
| 120°F | 1.11 | 1.08 | 1.04 | 1.01 | 0.98 | 0.95 | 0.93 | 0.91 | 0.88 | |
| R-22 Condensing Temperature |
80°F | 1.03 | 1.01 | 1.00 | 0.98 | 0.97 | 0.96 | 0.94 | 0.93 | 0.92 |
| 90°F | 0.93 | 0.91 | 0.90 | 0.89 | 0.87 | 0.86 | 0.85 | 0.84 | 0.83 | |
| 100°F | 0.84 | 0.83 | 0.81 | 0.80 | 0.79 | 0.78 | 0.77 | 0.76 | 0.75 | |
| 110°F | 0.77 | 0.75 | 0.74 | 0.73 | 0.72 | 0.71 | 0.70 | 0.69 | 0.68 | |
| 120°F | 0.71 | 0.69 | 0.68 | 0.67 | 0.65 | 0.64 | 0.63 | 0.62 | 0.61 | |
| R-404A Condensing Temperature | 80°F | 1.02 | 1.00 | 0.96 | 0.94 | 0.92 | 0.89 | 0.87 | 0.85 | 0.83 |
| 90°F | 0.95 | 0.92 | 0.89 | 0.86 | 0.84 | 0.81 | 0.80 | 0.78 | 0.76 | |
| 100°F | 0.88 | 0.85 | 0.81 | 0.79 | 0.76 | 0.74 | 0.72 | 0.70 | 0.68 | |
| 110°F | 0.83 | 0.80 | 0.77 | 0.74 | 0.71 | 0.69 | 0.67 | 0.65 | 0.63 | |
| 120°F | 0.77 | 0.75 | 0.71 | 0.68 | 0.66 | 0.63 | 0.61 | 0.59 | 0.58 | |
| R-410A Condensing Temperature |
80°F | 0.62 | 0.62 | 0.61 | 0.60 | 0.60 | ||||
| 90°F | 0.56 | 0.55 | 0.55 | 0.54 | 0.53 | |||||
| 100°F | 0.50 | 0.50 | 0.49 | 0.49 | 0.48 | |||||
| 110°F | 0.46 | 0.45 | 0.44 | 0.44 | 0.43 | |||||
| 120°F | 0.42 | 0.41 | 0.40 | 0.40 | 0.39 | |||||
| CO2 Condensing Temperature | 20°F | 0.37 | 0.37 | 0.37 | ||||||
| 40°F | 0.30 | 0.30 | 0.30 | |||||||
| 60°F | 0.23 | 0.23 | 0.23 | |||||||