High Pressure Conventional Oil Separators
Maximum Working Pressure—675 psig
Our standard screen style separators remove oil from refrigerant gas using three methods: velocity reduction, filtering through screens and baffling. All separated oil is then returned to the compressor crankcase or reservoir by an internal oil float valve.
Select an oil separator based on the system's tonnage under normal operating conditions. This is the capacity or compressor(s) BTUs based on the refrigerant gas at the saturated suction and condensing temperatures of the operating system. For selection purposes, select an oil separator with the nearest capacity to the system's load at the evaporating temperature.
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 | ODS Conn. Size | Dimensions | Max. Capacity in Tons of Refrigeration | Precharge Amount (oz.) | ||
|---|---|---|---|---|---|---|
| A | B | CO2 | R-410A | |||
| -20°F | +40°F | |||||
| OSH4-02 | 1/4 | 4" | 8.25" | 4 | 2.5 | 15 |
| OSH4-03 | 3/8 | 4" | 8.25" | 4 | 2.5 | 15 |
| OSH4-04 | 1/2 | 4" | 10.25" | 5 | 3 | 15 |
| OSH4-05 | 5/8 | 4" | 14.25" | 16 | 10 | 15 |
| OSH4-07 | 7/8 | 4" | 17.75" | 25 | 16 | 15 |
| OSH4-11 | 1-1/8 | 4" | 21" | 33 | 21 | 15 |
| OSH4-13 | 1-3/8 | 4" | 21" | 37 | 23 | 15 |
| OSH6-11 | 1-1/8 | 6" | 15.38" | 40 | 25 | 40 |
| OSH6-13 | 1-3/8 | 6" | 15.38" | 43 | 27 | 40 |
| OSH6-15 | 1-5/8 | 6" | 18.63" | 57 | 35 | 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 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 | |||||||