Bitzer 4DESH-7, Reciprocating compressor, Semihermetic, 4 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 ECOLINE H series (specifically the EH-ESH models) is the creative advancement of the proven, robust, and powerful semi-hermetic ECOLINE range. Combining high efficiency, smooth running, and high reliability, this series is designed as a specialist for demanding conditions, particularly high-temperature heat pumps and transport applications. It features an additionally reinforced drive gear and lubrication system, new valve plate designs for low rear expansion, and efficient broadband motors.
Model Identification: 4DESH-7
- 4: Number of cylinders (4 cylinders)
- DE: Identification for bore x stroke (Specific cylinder geometry for this displacement range)
- S: ECOLINE series identifier
- H: Special design for transport applications and high-temperature heat pumps (equipped with a reinforced drive gear and lubrication system)
- 7: Motor size identifier
Technical Features
- General Design: Creative advancement of the robust ECOLINE range, offering high efficiency and smooth running. It is downward compatible, replacing predecessors with the same connection sizes.
- Specialization: Specifically engineered for demanding conditions such as transport refrigeration (e.g., railway air conditioning) and high-temperature heat pumps.
- Drive Gear: Includes an additionally reinforced drive gear and a new piston and connecting rod design to handle extreme loads.
- Valve Plate: New valve plate design with a geometric concept for pressure valves for low rear expansion, providing high cooling capacity with minimal energy requirements.
- Motor: Efficient under full- and part-load thanks to broadband characteristics.
- Capacity Control: The CRII system allows intermittent blocked suction for a control range of 100% to ~10% (on a 4-cylinder model).
Specifications & Data
- Compressor Model: 4DESH-7 (Base model reference: 4DESH-7Y)
- Displacement at 50 Hz: 26.8 m³/h
- Heating Capacity (Qh): 21.50 kW (based on R515B at tₑ/t꜀ = 30°C/85°C)
- Oil Charge: 2.0 dm³
- Weight: 100 kg
- Max. Operating Current (Δ/Y Motor): 28.7 / 16.5 A
- Primary Refrigerants: R1234ze(E), R515B, R245fa (High-temperature design)
- Primary Oil Charge: Polyolester oil BSE85K
| Item num. | Ralco P/N | OEM P/N | Description (from OEM manufacturer) | Add | |
|---|---|---|---|---|---|
| 1 | KIT23241 | 37283506 | Gasket set. | ||
| 2 | MTR24012 | 34616812 | Built-in motor; dimensions: Ø190 (40S 7,5 HP). | ||
| 4 | KEY23200 | 38400306 | Parallel key; dimensions: 10 × 6 × 63 (steel). | ||
| 5 | LCKCMMB045 | 32050209 | Washer; dimensions: Ø45 × Ø12,5 × 8. | ||
| 6 | SPGCMW12 | 38215003 | Thrust washer; dimensions: A12 (spring steel DIN 128); used in: Built-in motor. | ||
| 7 | BLTCMA12X055 | 38016707 | Hexagon head screw; dimensions: M12 × 55 (DIN 931 - M12 × 55 - 10.9). | ||
| 8 | BLTCMA10X030 | 38015606 | Hexagon head screw; dimensions: M10 × 30; used in: Bearing cover. | ||
| 9 | GKT23003C | 38240131 | Gasket ring; dimensions: A10 × 16 × 2 (copper); used in: Oil drain. | ||
| 10 | 30510741 | Bearing cover. | |||
| 11 | BRG2205 | 31112501 | Bearing bush / Slide bearing; dimensions: Ø40 × Ø36 × 30 (Radial). | ||
| 12 | GKT23200 | 37293703 | Gasket; dimensions: 2241 × 241 × 0,38; used in: Bearing cover. | ||
| 13 | AGT2303 | 32110503 | Oil splasher plate; dimensions: Ø185 × 51. | ||
| 14 | BLTCMA6X012 | 38015402 | Hexagon head screw; dimensions: M6 × 12; used in: Oil splasher plate. | ||
| 15 | SPGCMW6 | 38215001 | Thrust washer; dimensions: S6 (spring steel). | ||
| 16 | 30229908 | Connecting rod / piston; dimensions: Ø50. | |||
| 17 | ROD23200 | 30213401 | Connecting rod; dimensions: Ø58,3 × Ø15 × 83. | ||
| 18 | 30227770 | Piston; dimensions: Ø50. | |||
| 19 | PIN2200 | 38340148 | Wrist pin; dimensions: Ø15 × Ø10 × 42. | ||
| 20 | SNPCMIX015 | 38223102 | Retaining ring with lugs; dimensions: Ø15 × 1; used in: Wrist pin. | ||
| 21 | SGM23230 | 38230095 | Piston ring; dimensions: Ø50 × 1,5 (ISO 6622); used in: Piston. | ||
| 22 | SGM29020 | 38231021 | Piston ring; dimensions: Ø50 × 1,5 (ISO 6622); used in: Piston. | ||
| 23 | CKS23200 | 30111150 | Eccentric shaft. | ||
| 24 | WAS2204 | 31210302 | Thrust washer; dimensions: Ø46 × Ø37,5 × 3. | ||
| 25 | BRG2205 | 31112504 | Bearing bush / Slide bearing; dimensions: Ø40 × Ø36 × 30 (Radial). | ||
| 26 | WAS23200 | 31300024 | Adjusting washer; dimensions: Ø45 × Ø33,1 × 2; used in: Motor side. | ||
| 27 | GRF2305 | 36131505 | Shut-off valve; dimensions: Ø22 - Ø19; used in: Discharge gas side. | ||
| 28 | GKT1236 | 37270203 | Gasket; dimensions: 35 × 60 × 1. | ||
| 29 | BLTCMA8X020 | 38034001 | Cheese-head screw; dimensions: M8 × 20 (ISO 14579 - M8 × 20 - 8.8). | ||
| 30 | HED23103 | 30236036 | Cylinder head; dimensions: 165 × 125 × 57. | ||
| 31 | PLU2E200 | 36610021 | Plug; dimensions: 1/8" - 27 NPTF; used in: Cylinder head. | ||
| 32 | BLTCMA10X065 | 38005604 | Hexagon head screw; dimensions: M10 × 65; used in: Cylinder head. | ||
| 33 | PLT2E230 | 30405911 | Valve plate; dimensions: Ø50. | ||
| 34 | GKT23250 | 37261801 | Gasket; dimensions: 165 × 124 × 0,38 (metallic support); used in: Cylinder head. | ||
| 35 | GKT23211 | 37251705 | Gasket; dimensions: 165 × 124 × 0,8. | ||
| 36 | GRF2377 | 36131577 | Shut-off valve; dimensions: Ø28. | ||
| 37 | BLTCMA10X030 | 38034006 | Cheese-head screw; dimensions: M10 × 30 (ISO 14579 - M10 × 30 - 8.8). | ||
| 38 | GKT23102 | 37270405 | Gasket; dimensions: ØI 34,5 × 1,0 (LA66); used in: Suction gas shut-off valve. | ||
| 39 | SRN23203 | 36201203 | Suction gas filter; dimensions: Ø33 × 43; used in: Suction gas shut-off valve. | ||
| 40 | TER23200 | 34550705 | Terminal plate; dimensions: 90 × 70 × 10 (6-wire). | ||
| 40 | 34550706 | Terminal plate; dimensions: 90 × 70 × 10 (3-wire). | |||
| 41 | 34343012 | Kit connection bridge; dimensions: 29,5 × 9,5 × 1. | |||
| 42 | BLTCMA8X025 | 38039303 | Cheese-head screw; dimensions: M8 × 25 (ISO 4762 - M8 × 25 - 10.9). | ||
| 46 | GKT2E200 | 37293810 | Gasket; dimensions: 90 × 70 × 0,73; used in: Terminal plate. | ||
| 47 | GKT23000T | 37220010 | Gasket ring; dimensions: Ø31,9 × 1,6 × 1,8 (PTFE); used in: Sight glass. | ||
| 48 | GLS23300 | 36181501 | Sight glass; dimensions: Ø22 × 1 1/8" - 18 UNEF. | ||
| 50 | 34351781 | Terminal box; dimensions: 202 × 132 × 83,5 (aluminum); from year: 12/2021. | |||
| 50 | BOX2303 | 34352303 | Terminal box; dimensions: 202 × 132 × 83. | ||
| 51 | BLT23154 | 38050154 | Oval head screw; dimensions: M6 × 16; used in: Aluminium terminal box. | ||
| 52 | 38051602 | Oval head screw; dimensions: M4 × 18. | |||
| 53 | SEN2101 | 34703504 | Compressor protection device (110/230 V - 50/60Hz); from year: 06/2021. | ||
| 53 | SEN2101 | 34703504 | Compressor protection device (110/230 V - 50/60Hz); from year: 06/2021. | ||
| 53 | 34702804 | Compressor protection device (24 V - 50/60 Hz). | |||
| 53 | 34702805 | Compressor protection device (24 V - DC). | |||
| 54 | GKT23200 | 37293703 | Gasket; dimensions: 2241 × 241 × 0,38; used in: Housing cover. | ||
| 55 | 30523805 | Housing cover; used in: Motor side. | |||
| 56 | 38005602 | Hexagon head screw; dimensions: M10 × 55; used in: Housing cover. | |||
| 57 | HTR2300 | 34321901 | Oil heater (200..260 V - 120 W). | ||
| 57 | 34321902 | Oil heater (100..140 V - 120 W). | |||
| 59 | 37000020 | Kit damper elements (elastomer). | |||
| 60 | 32439101 | Lifting eye; dimensions: 33 × 32 × 50. | |||
| 66 | 38005621 | Hexagon head screw; dimensions: M10 × 50; used in: Cylinder head. | |||
| 67 | 36620117 | Protective cap; dimensions: 3/4" - 16 UNF / L=43 (plastic - GRP). | |||
| 68 | 36620119 | Protective cap; dimensions: M24×2 // L = 57,5 (plastic - GRP). | |||
| 70 | 37507901 | Plug; dimensions: Ø8 × 16; used in: Aluminium terminal box. | |||
| 75 | 34775001 | Retrofit kit oil control; dimensions: 241,2 × 241,2. | |||
| 76 | PLUCMA20A | 38091003 | Sealing screw; dimensions: M20×1,5. | ||
| 80 | 34733403 | Opto-electronic unit (OLC-K1 230 V - 50/60 Hz). | |||
| 80 | 34733404 | Opto-electronic unit (OLC-K1 115 V - 50/60 Hz). | |||
| 81 | GKT23006A | 38240301 | Gasket ring; dimensions: A20 × 24 × 1,5 (aluminum); used in: Oil level monitoring - minimum. | ||
| 90 | PLU2E200 | 36610021 | Plug; dimensions: 1/8" - 27 NPTF. | ||
| 91 | PLU2E200 | 36610021 | Plug; dimensions: 1/8" - 27 NPTF. | ||
| 92 | 36150122 | Schrader valve; dimensions: 1/4" - 18 NPTF. | |||
| 100 | 38051601 | Oval head screw; dimensions: M4 × 8. | |||
| 101 | 34502502 | Terminal strip; dimensions: 60 × 30 (6-pole). | |||
| 110 | 38000453 | Hexagon head screw; dimensions: M6 × 35. | |||
| 111 | SPGCMW6 | 38215001 | Thrust washer; dimensions: S6 (spring steel). | ||
| 112 | 34595001 | Recommendation sign; dimensions: M6. | |||
| 113 | 30291502 | Terminal. | |||
| 114 | 31101801 | Spacer sleeve; dimensions: Ø14 × Ø6,3 × 21,4. | |||
| 115 | WAS2E115 | 38210154 | Toothed washer; dimensions: A6,4 (spring steel galvanized). |
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