Dorin Semi-Hermetic Compressor Catalog

💱 Price Note: Prices stated on this page are USD-based reference values. For the current TL equivalent and stock status, we recommend visiting the product page. Prices on Yedepa.com are calculated at the daily exchange rate.

Introduction: The Dorin Brand and Its Place in the World of Semi-Hermetic Compressors

In the industrial refrigeration and commercial air conditioning sector, Dorin, founded in 1918 in Florence, Italy, is a compressor manufacturer with more than a century of engineering expertise. Officine Mario Dorin SpA is today regarded as one of the most reliable brands worldwide in the field of semi-hermetic reciprocating compressors. The Dorin Semi-Hermetic Compressor Catalog is a reference for cold storage operators, supermarket refrigeration system integrators, industrial process cooling engineers and dairy/meat processing plant technicians.

In this comprehensive catalog guide, we will examine Dorin's H Series single-stage and 2S Series two-stage semi-hermetic compressor models, their technical specifications, the criteria for choosing the right model for the right application, and the original Dorin products you can obtain through Yedepa.com. Our aim is to provide a solid reference for every reader, from the plant owner making an investment decision to the technician carrying out the field installation.

Operating Principle and Technical Details of Dorin Semi-Hermetic Compressors

Unlike hermetic compressors, semi-hermetic compressors are serviceable reciprocating machines in which the motor and compressor housings are joined by detachable flanges and whose cylinder heads and valves can be removed. Thanks to this design, over a service life of 20+ years Dorin compressors lend themselves to major maintenance work such as valve replacement, piston ring replacement, motor rewinding and crankshaft-connecting rod overhaul.

The technical advantages of Dorin's reciprocating semi-hermetic design are as follows:

High volumetric efficiency: Reed-type suction and discharge valves; a design that maintains volumetric efficiency even at high speeds.
Oil separator integration: Long-term lubrication assurance with an oil pump in the crankcase and differential pressure control.
Refrigerant flexibility: R404A, R448A, R449A, R134a, R407F, R452A and compatibility with new-generation low-GWP HFO blends.
Wide capacity range: Single units from 2 HP to 80 HP, scalable to 500+ kW cooling capacity in parallel compressor rack systems.
CIC (Cooled Internal Compression) system: Wide operating envelope with liquid injection cooling, especially in low temperature (LT) applications.

In two-stage 2S Series models, a high COP can be achieved even at evaporating temperatures of -45°C to -55°C. This is a critical feature for ice cream factories, fish processing plants and the pharmaceutical sector.

Dorin Models and Types: H Series and 2S Series

Dorin semi-hermetic compressors are broadly divided into two main families:

H Series (Single-Stage Semi-Hermetic)

The H Series is Dorin's most widely used single-stage semi-hermetic compressor family. It is generally preferred in medium temperature (MT) applications, supermarket display cooling, cold storage, air handling units and process cooling. The model naming follows this logic:

H xxxx CC: Air cooled, single head, conventional reciprocating configuration.
H xxxx CS: Water cooled or cooled head variant; runs more stably at high ambient temperatures or high pressure ratios.

In this series, models such as Dorin H Series H 5500 CC, H 5500 CS, H 6000 CC, H 6000 CS, H 7500 CC, H 7501 CS, H 8000 CS, H 8001 CC and H 9000 CC are the best-selling capacities.

2S Series (Two-Stage)

The 2S Series is specially designed for low and ultra-low temperature (LT/ULT) applications. First-stage (LP) and second-stage (HP) cylinders are combined in a single compressor housing, and intercooling ensures high efficiency even at high pressure ratios. Dorin Two-Stage 2S-H5000, 2S-H6000 and 2S-H6500 Semi-Hermetic Compressor models are the most powerful representatives of this series and are invaluable especially in plants requiring evaporating temperatures of -40°C and below.

Which Dorin Model to Choose in Which Case?

Wrong compressor selection means low COP, oil carry-over, motor burnout and early failure. The table below summarizes basic model guidance by application:

Application	Evaporating (°C)	Recommended Series	Example Model
Milk cooling tank / air conditioning	0 / +5	H Series CC	H 5500 CC, H 6000 CC
Supermarket display (MT)	-10	H Series CC/CS	H 7500 CC, H 7501 CS
Meat / vegetable cold store	-15 / -20	H Series CS	H 8000 CS, H 8001 CC
Frozen product store	-25 / -30	H Series CC (high HP)	H 9000 CC
Blast freezing / ice cream factory	-35 / -45	2S Two-Stage	2S-H5000, 2S-H6000
Pharmaceutical / biotechnology ultra-LT	-50 / -55	2S Two-Stage (large)	2S-H6500

When making a selection, not only the evaporating temperature but also condensing temperature, refrigerant type, annual operating hours, part-load profile and electricity tariff must be considered. With Dorin's official selection software (Dorin Software), ARI, EN12900 and custom-condition performance curves can be generated for each model; the Yedepa.com engineering team makes this selection on your behalf.

Dorin Semi-Hermetic Compressor Models Available at Yedepa.com

Yedepa.com supplies original Dorin semi-hermetic compressors from stock throughout Turkey. Below are the main models we sell within the scope of the Dorin Semi-Hermetic Compressor Catalog:

Dorin Two-Stage 2S-H6500 Semi-Hermetic Compressor — The largest two-stage model, for ultra-low temperature applications.
Dorin Two-Stage 2S-H6000 Semi-Hermetic Compressor — Optimum capacity for ice cream and blast freezing plants.
Dorin Two-Stage 2S-H5000 Semi-Hermetic Compressor — Price/performance leader in medium-scale LT applications.
Dorin H Series H 9000 CC Semi-Hermetic Compressor — The flagship of the H family, for large-capacity single-stage needs.
Dorin H Series H 8000 CS Semi-Hermetic Compressor — Water-cooled/cooled head, high condensing conditions.
Dorin H Series H 8001 CC Semi-Hermetic Compressor — Ideal MT/LT solution for large cold stores.
Dorin H Series H 7501 CS Semi-Hermetic Compressor — Supermarket chains and refrigerated warehouses.
Dorin H Series H 7500 CC Semi-Hermetic Compressor — The best-selling mid-segment H Series model.
Dorin H Series H 6000 CS Semi-Hermetic Compressor — Milk cooling and central air conditioning systems.
Dorin H Series H 6000 CC Semi-Hermetic Compressor — Industrial process cooling.
Dorin H Series H 5500 CC / CS Semi-Hermetic Compressor — Economical entry level for small to medium cold rooms.

Depending on model capacity and selected accessories, the price range runs from approximately 4,255 USD for the H Series entry level up to the 5,532 USD band for the largest 2S-H6500 two-stage model. For current prices and a net quote including VAT, we recommend visiting the product pages or contacting us via the Yedepa.com B2B line.

Selection Criteria and Professional Tips

Critical points for refrigeration system engineers and experienced HVAC technicians when choosing a Dorin compressor:

Cooling load calculation: Looking only at room volume is misleading; product entry temperature, door opening frequency, lighting, fan heat and personnel load must be taken into account.
Condensing temperature (Tc): A 55°C Tc design for Turkish summers is a very common mistake; Dorin envelope curves show that some models require CIC or a water-cooled head at this point.
Refrigerant changeover: When switching from R404A to R448A/R449A, oil compatibility, valve POE viscosity and electronic expansion valve setting are critical. Be sure to check Dorin's refrigerant compatibility table.
Parallel rack design: For large capacities, connecting 3-4 H Series compressors in parallel instead of one large compressor provides significant energy savings at part load.
Oil level and crankcase heater: If the crankcase heater is not working during long seasonal shutdowns, oil foaming and mechanical seizure at first start-up are inevitable.
Vibration and noise isolation: Spring base mounting, flexible vibration mounts and flexible copper connections (vibration absorbers) extend service life by at least 30%.

At Yedepa.com, refrigeration engineers with 15+ years of field experience work on our technical support line; before choosing a model, we strongly recommend filling in the technical form via Yedepa.com.

Maintenance and Usage Recommendations for Dorin Semi-Hermetic Compressors

To get a service life of 80,000–100,000 hours (approximately 15–20 years) from a Dorin semi-hermetic compressor, periodic maintenance must be carried out meticulously.

First 100 hours: The oil and oil filter must be changed; brazing residues and installation debris in the system clog the filter.
Every 5,000 hours: Have an oil analysis done (oil acidity, metal particles, water content); change the oil and filter if necessary.
Once a year: Electrical check — winding resistance, insulation to earth (at least 100 MΩ with a megger), contactor contact condition.
Every two years: Valve plate check, piston ring wear measurement, crank bearing clearance with a micrometer.
Continuous monitoring: High pressure, low pressure, oil pressure differential and motor winding temperature (PTC/INT69) must be connected to a continuously alarmed monitoring device.

Original Dorin spare parts (valve set, piston ring set, gasket kit, INT69 module) are in stock with the Yedepa.com guarantee. Using equivalent parts may adversely affect warranty conditions and performance.

Frequently Asked Questions (FAQ)

What is the difference between a Dorin semi-hermetic compressor and a hermetic compressor?

Hermetic compressors are enclosed in a sealed shell and cannot be serviced; in case of failure they are replaced completely. Semi-hermetic Dorin models, thanks to their flanged design, allow parts such as valves, piston rings and motor windings to be removed and replaced. In industrial applications, the total cost of ownership is much lower.

Which refrigerants is the Dorin H Series compatible with?

Standard H Series models are compatible with R134a, R404A, R407A/C/F, R448A, R449A, R452A and R507. For new-generation low-GWP HFO blends, Dorin's special "E" variants and a suitable POE oil are required.

At what temperatures do two-stage 2S Series models offer an advantage?

At evaporating temperatures of -30°C and below, two-stage compressors provide 20–35% higher COP than their single-stage equivalents. In blast freezing, ice cream, pharmaceutical and biotechnology applications, the 2S-H5000, 2S-H6000 and 2S-H6500 models are preferred.

Why are Dorin compressor prices at this level?

Dorin is an Italian brand with 100% European production. High-grade materials and tight tolerances are used in the crankshaft, block, connecting rods and valve plates. Considering the long service life and low energy consumption, the initial investment pays for itself within 3–5 years.

How can I identify the model of my Dorin compressor?

Look at the "Model" and "Serial No." fields on the metal label on the compressor. For example, if it says "H 7500 CC", this is the Dorin H Series 7500 air-cooled model. If you cannot read the label, send a photo to the Yedepa.com WhatsApp line and we will identify it.

How long does it take for spare parts (valves, piston rings, motor) to arrive?

Spare parts for the best-selling H 5500, H 6000, H 7500 and H 8000 models are in stock at the Yedepa.com Istanbul warehouse. For less frequently sold large models (H 9000, 2S Series), lead times may vary; always confirm with us before ordering.

What is the warranty period for Dorin compressors?

All original Dorin semi-hermetic compressors sold through Yedepa.com have a 12-month manufacturer's warranty, subject to correct installation and commissioning. Pressure, oil and electrical parameters must be recorded during commissioning.

Conclusion and Yedepa.com Advantages

With more than a century of engineering heritage, a wide model range and compatibility with new-generation refrigerants, Dorin maintains its place among the indispensable brands of the industrial refrigeration and commercial air conditioning sector in Turkey. In this Dorin Semi-Hermetic Compressor Catalog guide, we have covered the technical features of both the single-stage H Series and the two-stage 2S Series models, matching the right model to the right application, and maintenance tips.

Yedepa.com – the main reasons to choose us:

Original products in stock: The most widely used H 5500, H 6000, H 7500, H 8000 models and 2S Series two-stage compressors are ready in our stock in Turkey.
Engineering support: Free technical consultancy on cooling load calculation, compressor selection and parallel rack design.
Spare parts guarantee: All spare parts such as valves, piston rings, gasket kits and INT69 motor protection modules from a single source.
B2B invoicing and payment terms: Corporate sales terms for refrigeration companies, supermarket chains and industrial plants.
After-installation support: For technical questions after commissioning, our WhatsApp and phone line is open to technicians and service companies.

Using the right Dorin model in the right application can lower your plant's annual energy bill by thousands of USD and double the system's service life. For detailed selection and a quote, visit the Yedepa.com Dorin Semi-Hermetic Compressor Catalog page today.