Bitzer 2EHC-3K, 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

The BITZER 2EHC-3K is a legacy subcritical CO2 compressor from the Octagon series, specifically engineered for R744 applications in the low-temperature stage of cascade refrigeration systems.

Model Identification Breakdown:

2: Number of cylinders
E: Identification letter for bore x stroke (displacement indicator)
HC: Series identifier (Octagon series, optimized for subcritical CO2 pressures)
3: Motor size code / Nominal HP
K: Oil charge identifier (Standard CO2 ester oil, e.g., BSE85K or BSE60K)

Series Classification & Application:

This model belongs to the legacy BITZER Octagon CO2 series (2KC-4FC and 2MHC-4NHC groups). These compressors were engineered exclusively for subcritical CO2 (R744) applications, typically utilized in the low-temperature stage of commercial and industrial cascade refrigeration systems.

Technical Features:

Lubrication: Approved system using BITZER Polyolester (POE) oils (BSE85K or BSE60K) to accommodate the high solubility of CO2 in oil.
Crankcase Heater: Mandatory self-regulating PTC crankcase heater to prevent refrigerant condensation into the oil during standstill, ensuring proper lubricity upon startup.
Pressure Safety: Heavily reinforced housing compared to standard HFC compressors, designed to handle higher working and standstill pressures (typically up to 40 bar suction / 53 bar discharge).

Specifications & Data:

Compressor Type: Reciprocating (Octagon Series)
Refrigerant: R744 (Carbon Dioxide)
Configuration: Subcritical CO2 System
Cylinders: 2
Displacement Series: Series 'E' (Octagon Bore X Stroke)
Motor Size Code: 3
Oil Type: POE (BSE85K or BSE60K)

Item num.	Ralco P/N	OEM P/N	Description (from OEM manufacturer)
1	KIT23222	37283501	Gasket set.
2	BRG2205	31112504	Bearing bush / Slide bearing; dimensions: Ø40 × Ø36 × 30 (Radial); from year: 3.
3	BRG2205	31112504	Bearing bush / Slide bearing; dimensions: Ø40 × Ø36 × 30 (Radial); from year: 3.
4	WAS2204	31210302	Thrust washer; dimensions: Ø46 × Ø37,5 × 3.
5	WAS2204	31210302	Thrust washer; dimensions: Ø46 × Ø37,5 × 3.
6		30116750	Eccentric shaft.
7	KEY2201	38400301	Parallel key; dimensions: 10 × 6 × 36 (steel DIN 6885 - A).
9		30229839	Connecting rod / piston; dimensions: Ø46.
22		30510741	Bearing cover.
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	31112504	Bearing bush / Slide bearing; dimensions: Ø40 × Ø36 × 30 (Radial); from year: 3.
39	WAS23200	31300024	Adjusting washer; dimensions: Ø45 × Ø33,1 × 2.
40		34614712	Built-in motor; dimensions: Ø190 (40S 3 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).
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		30405906	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		36110025	Pressure relief valve; dimensions: 1/4" - 18 NPTF (25 bar).
173		36110031	Pressure relief valve; dimensions: 1/4" - 18 NPTF (25 bar).
174		36620110	Protective cap; dimensions: Ø46 × 15.
178	RNG2002	37203002	O-ring.
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		30523806	Housing cover.
243		38022802	Hexagon head screw; dimensions: M10 × 30 (ISO 4017 - M10 × 30 - 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.