Bitzer 2EC-6.2K, Reciprocating compressor, Semihermetic, 2 Cylinders
Use this catalogue to identify the spare parts you need to repair your compressor. The OEM catalogue is crossreferenced with our spare parts database, matched items are highlighted. Some of our existing spare parts may not be shown because our database is incomplete (e.g. missing OEM P/N), or because we sell the items separatelly (typical example is the piston-connecting rod assembly). If you have any doubt please ask us.
All OEM manufacturer's names, part numbers, diagrams, products description and information are provided for reference and identification purposes only, and it is not implied that any part listed is the product of the OEM manufacturer.
Compressor description by Ralkin
BITZER 2EC-6.2K Octagon CO2 Compressor Description
The BITZER 2EC-6.2K is a robust, twin-cylinder screw compressor belonging to the legacy Octagon series, engineered exclusively for high-pressure subcritical R744 (CO2) applications. Designed for reliability in demanding environments, this compressor serves as a critical component in the low-temperature stages of commercial and industrial cascade refrigeration systems, ensuring stable operation under extreme pressure differentials.
Model Identification Breakdown
Based on the legacy BITZER Octagon nomenclature:
- 2: Number of active cylinders (twin screw).
- E: Identification letter for the specific bore and stroke (displacement indicator).
- C: Series identifier denoting the OCTAGON series housing optimized for subcritical CO2 pressures.
- 6.2: Motor size code corresponding to the nominal horsepower.
- K: Oil charge identifier indicating the use of standard CO2 ester oil (POE).
Technical Features & Operational Guidelines
- Series Classification: Part of the legacy group (2KC through 4FC) built exclusively for subcritical CO2 cascade applications.
- Lubrication System: Due to the extreme solubility of CO2 in lubricants, this unit requires BITZER-approved Polyolester (POE) oils, specifically BSE85K or BSE60K, to maintain viscosity and lubricity.
- Crankcase Heater: A self-regulating PTC crankcase heater is mandatory to prevent CO2 migration into the oil sump during shutdown, which could cause foaming and lubrication failure upon startup.
- Pressure Safety: Constructed with reinforced components to withstand subcritical CO2 operating pressures (typically up to 40 bar suction and 53 bar discharge), though external safety relief systems are required for extended power-outage scenarios.
Specifications & Data
- Model Series: Legacy BITZER Octagon CO2 (Group 1).
- Refrigerant: R744 (Carbon Dioxide).
- Configuration: 2-Cylinder Twin Screw.
- Motor Size: 6.2 kW (approximate nominal rating).
- Design Pressure Limits: ~40 bar (Low Side) / ~53 bar (High Side).
- Recommended Oil: BITZER BSE85K or BSE60K (Polyolester).
| Item num. | Ralco P/N | OEM P/N | Description (from OEM manufacturer) | Add | |
|---|---|---|---|---|---|
| 1 | KIT23222 | 37283501 | Gasket set. | ||
| 2 | BRG2205 | 31112501 | Bearing bush / Slide bearing; dimensions: Ø40 × Ø36 × 30 (Radial); from year: 2. | ||
| 3 | BRG2205 | 31112501 | Bearing bush / Slide bearing; dimensions: Ø40 × Ø36 × 30 (Radial); from year: 2. | ||
| 4 | WAS2204 | 31210302 | Thrust washer; dimensions: Ø46 × Ø37,5 × 3. | ||
| 5 | WAS2204 | 31210302 | Thrust washer; dimensions: Ø46 × Ø37,5 × 3. | ||
| 6 | 30110852 | Eccentric shaft. | |||
| 7 | KEY23220 | 38400304 | Parallel key; dimensions: 10 × 6 × 54 (steel DIN 6885 - A). | ||
| 9 | 30229802 | Connecting rod / piston; dimensions: Ø46. | |||
| 22 | 30510741 | Bearing cover; from year: 2. | |||
| 24 | GKT23200 | 37293703 | Gasket; dimensions: 2241 × 241 × 0,38. | ||
| 26 | GKT23003C | 38240131 | Gasket ring; dimensions: A10 × 16 × 2 (copper). | ||
| 27 | BLTCMA10X030 | 38017802 | Hexagon head screw; dimensions: M10 × 30 (ISO 4017 - M10 × 30 - 10.9); from year: 3. | ||
| 32 | BRG2205 | 31112501 | Bearing bush / Slide bearing; dimensions: Ø40 × Ø36 × 30 (Radial); from year: 2. | ||
| 39 | WAS23200 | 31300024 | Adjusting washer; dimensions: Ø45 × Ø33,1 × 2. | ||
| 40 | 34616212 | Built-in motor; dimensions: Ø190 (40S 5,5 HP). | |||
| 44 | AGT2304 | 32110504 | Oil splasher plate; dimensions: Ø185 × 54. | ||
| 46 | BLTCMA6X012 | 38015402 | Hexagon head screw; dimensions: M6 × 12 (DIN 933 - M6 × 12 - 10.9). | ||
| 47 | SPGCMW6 | 38215001 | Thrust washer; dimensions: S6 (spring steel); from year: 2. | ||
| 54 | LCKCMMB045 | 32050209 | Washer; dimensions: Ø45 × Ø12,5 × 8; from year: 2. | ||
| 55 | SPGCMW12 | 38220106 | Single-coil spring washer; dimensions: A12 (DIN 127). | ||
| 56 | 38016702 | Hexagon head screw; dimensions: M12 × 40 (DIN 933 - M12 × 40 - 10.9); from year: 2. | |||
| 70 | 37507901 | Plug; dimensions: Ø8 × 16. | |||
| 89 | GKT23205 | 37271801 | Gasket; dimensions: 32 × 48 × 0,38 (metallic support). | ||
| 90 | GKT23204 | 37293801 | Gasket; dimensions: 52 × 52 × 0,38. | ||
| 91 | TER2210 | 34550015 | Terminal plate; dimensions: 52 × 52 × 39 (6-wire). | ||
| 92 | TER2205 | 34550401 | Terminal plate; dimensions: 48 × 32 × 39. | ||
| 93 | 38022807 | Hexagon head screw; dimensions: M6 × 16 (ISO 4017 - M6 × 16 - 10.9); from year: 2. | |||
| 94 | 31502701 | Earth screw; dimensions: M6 × 42. | |||
| 95 | 38022807 | Hexagon head screw; dimensions: M6 × 16 (ISO 4017 - M6 × 16 - 10.9); from year: 2. | |||
| 96 | TER2204 | 34342801 | Terminal plate. | ||
| 98 | WAS2E115 | 38210154 | Toothed washer; dimensions: A6,4 (spring steel galvanized DIN 6797). | ||
| 100 | 36150122 | Schrader valve; dimensions: 1/4" - 18 NPTF. | |||
| 110 | 32035402 | Lifting eye; dimensions: 51 × 30 × 4. | |||
| 120 | 36131550 | Shut-off valve; dimensions: Ø22; from year: 2. | |||
| 121 | 36620650 | Protective cap; dimensions: 3/4" - 16 UNF (aluminum); from year: 3. | |||
| 130 | GKT1236 | 37270203 | Gasket; dimensions: 35 × 60 × 1; from year: 2. | ||
| 131 | GKT1236 | 37270203 | Gasket; dimensions: 35 × 60 × 1; from year: 2. | ||
| 132 | BLTCMA8X020 | 38034001 | Cheese-head screw; dimensions: M8 × 20 (ISO 14579 - M8 × 20 - 8.8); from year: 2. | ||
| 150 | 36131551 | Shut-off valve; dimensions: Ø16; from year: 2. | |||
| 151 | 36620650 | Protective cap; dimensions: 3/4" - 16 UNF (aluminum); from year: 3. | |||
| 158 | GKT1236 | 37270203 | Gasket; dimensions: 35 × 60 × 1; from year: 2. | ||
| 159 | BLTCMA8X020 | 38034001 | Cheese-head screw; dimensions: M8 × 20 (ISO 14579 - M8 × 20 - 8.8); from year: 2. | ||
| 160 | PLT2E220 | 30405901 | Valve plate; dimensions: Ø46. | ||
| 161 | GKT23212 | 37251703 | Gasket; dimensions: 165 × 124 × 0,8. | ||
| 162 | GKT23250 | 37261801 | Gasket; dimensions: 165 × 124 × 0,38 (metallic support). | ||
| 164 | HED23013 | 30236013 | Cylinder head; dimensions: 165 × 123 × 43. | ||
| 165 | 38001909 | Hexagon head screw; dimensions: M10 × 60 (ISO 4014 - M10 × 60 - 10.9); from year: 2. | |||
| 166 | 38001963 | Hexagon head screw; dimensions: M10 × 65 (ISO 4014 - M10 × 65 - 10.9); from year: 3. | |||
| 167 | PLU2E200 | 36610021 | Plug; dimensions: 1/8" - 27 NPTF. | ||
| 173 | 36110030 | Pressure relief valve; dimensions: 1/2" - 14 NPTF (34 bar). | |||
| 174 | 00000011 | is not required for this type !. | |||
| 178 | 00000011 | is not required for this type !. | |||
| 190 | HTR2300 | 34321901 | Oil heater (200..260 V - 120 W). | ||
| 190 | 34321902 | Oil heater (100..140 V - 120 W). | |||
| 200 | 37000020 | Kit damper elements (elastomer). | |||
| 237 | GKT23000T | 37220010 | Gasket ring; dimensions: Ø31,9 × 1,6 × 1,8 (PTFE); from year: 2. | ||
| 238 | GLS23300 | 36181501 | Sight glass; dimensions: Ø22 × 1 1/8" - 18 UNEF. | ||
| 240 | GKT23200 | 37293703 | Gasket; dimensions: 2241 × 241 × 0,38. | ||
| 241 | SRN23300 | 36201201 | Suction gas filter; dimensions: Ø24 × 41,7. | ||
| 242 | 30523805 | Housing cover. | |||
| 243 | 38001915 | Hexagon head screw; dimensions: M10 × 55 (ISO 4014 - M10 × 55 - 10.9); from year: 2. | |||
| 470 | SEN2101 | 34703504 | Compressor protection device (110/230 V - 50/60Hz); from year: 2. | ||
| 470 | SEN2101 | 34703504 | Compressor protection device (110/230 V - 50/60Hz); from year: 2. | ||
| 470 | 34702804 | Compressor protection device (24 V - 50/60 Hz); from year: 2. | |||
| 470 | 34702805 | Compressor protection device (24 V - DC); from year: 2. | |||
| 472 | 38040206 | Cheese-head screw; dimensions: M4 × 16 (DIN 84 - M4 × 16). | |||
| 473 | BLT23154 | 38050154 | Oval head screw; dimensions: M6 × 16 (DIN 7985 - M6 × 16 - 4.8). | ||
| 475 | NUT42300 | 38130104 | Hexagon nut; dimensions: M6 (ISO 4032 - M6 - Ms). | ||
| 477 | 34595001 | Recommendation sign; dimensions: M6. | |||
| 478 | WAS70033 | 38200203 | Washer; dimensions: A6,4 (brass DIN 125). | ||
| 479 | WAS2E115 | 38210154 | Toothed washer; dimensions: A6,4 (spring steel galvanized DIN 6797). | ||
| 484 | 34350241 | Terminal box; dimensions: 206 × 136 × 73 (aluminum); used in: X. | |||
| 484 | BOX2244 | 34350944 | Terminal box; dimensions: 202 × 95 × 57 (IP65); from year: 2. |
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