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DMZL 4-Cylinder Semi-Hermetic Compressor 8-20HP

China DMZL Semi Hermetic Piston Compressor 4 Cylinder low temp mid temperature 8-20HP

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Industrial Semi Hermetic Compressors | Reliable & Durable | DM Compressor

DM Compressor offers high-performance industrial reciprocating compressors for food storage, environmental comfort, and manufacturing. Durable, energy-efficient, and low-maintenance. Find the perfect reciprocating compressor for your refrigeration solution. Contact us now!

Horse Power:	8HP 10HP 12HP 15HP 20HP
Power supply:	220~240v/50hz/3ph 380~420v/50hz/3ph 440v~480v/60hz/3ph dual power supply customized motor
Motor protector:	internal motor sensor 3 wiring connection external module 6 wiring connection
Lubricant:	R404A R507A R134A R22
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Model:
4YD/4YG
Brand:
DMZL

Semi-Hermetic Compressor 8-20HP Compressor 8-20HP 4-Cylinder Semi-Hermetic Compressor DMZL Compressor 8-20HP

Product Description

Technical Specifications

Cooling Performance

FAQ

DMZL 4-Cylinder Semi-Hermetic Compressor 8-20HP

Product Overview & Scenario-Specific Solutions

Designed for high-power low/mid-temperature refrigeration, the DMZL 4-Cylinder Semi-Hermetic Piston Compressor (8-20HP) delivers robust performance for industrial-scale cooling needs. Its forced-lubrication system and heavy-duty construction make it suitable for demanding environments where reliability and high cooling capacity are non-negotiable.

Large-Scale Cold Storage & Warehousing

• Powers walk-in freezers and bulk cold storage facilities (1,000–5,000㎡) for frozen meats, seafood, and agricultural products, maintaining temperatures as low as -45°C (with R404A/R507A).

• Supports multi-compressor parallel systems for scalable cooling, ideal for distribution centers in the food and pharmaceutical industries.

Industrial Manufacturing & Commercial Freezing

• Industrial Cooling: Cools machinery and processes in plastic extrusion, chemical production, and electronics manufacturing, where heat loads require 5.5–15kW cooling capacity.

• Commercial Frozen Displays: Drives large-format frozen food islands in hypermarkets and industrial-grade ice-making machines, ensuring consistent freezing without energy waste.

Engineered Design & Heavy-Duty Materials

• Forced-Lubrication System: Ensures continuous oil supply to critical components (crankshaft, bearings) even under high-load operation, reducing wear and extending service life to 15+ years.

• Semi-Hermetic Sealing: Integral motor-compressor casting eliminates shaft seals, minimizing refrigerant leakage (≤0.1% annual leakage rate) and lowering environmental impact.

• Precision CNC Machining: Cylinder bores and crankshafts are processed via 5-axis CNC centers, ensuring concentricity and minimal dead space—boosting compression efficiency by 8–10% vs. standard compressors.

• Wear-Resistant Components: Chrome-plated piston rings, hardened alloy steel crankshafts, and imported impact-resistant spring steel valve reeds withstand high pressure and frequent cycling.

DMZL 4-Cylinder Semi-Hermetic Compressor 8-20HP

Technical Support & Industrial-Grade Services

• CIC System Compatibility: Supports Crankcase Injection Cooling (CIC) for high-temperature environments (ambient >40°C), preventing overheating during peak loads.

• Customized Cooling Solutions: Engineers provide load calculations and system design for parallel compressor setups, ensuring optimal energy efficiency (EER 3.0–3.5).

• After-Sales Warranty: 24-month warranty on the compressor body, with free on-site repair for major failures within the first year.

• Spare Parts Inventory: Global warehouses stock critical parts (lubrication pumps, motor windings) for next-day delivery to industrial clients.

DMZL Model

Nominal Power HP/KW

Displacement m³/h@ 50Hz

Number of Cylinders×Diameter×Stoke

Exhaust & Suction Valve mm/IN

Oil Volume
L

Power
V/φ/Hz

Electrical Parameter

Crankcase Heater (220V)W

Oil Supply Method

Weight (with lubricant)
Kg

DL Exhaust Valve

SL Suction Valve

Max Operating Current (A)

Starting/ Locked Current (A)

4YD-3.2

3/2.2

18.1

4×φ41×39.3

φ16

φ22

220-240△/380-420Y/3/50 265-290△/440-480Y/3/60

15.9/9.2

76.6/44.2

120

Centrifugal lubrication

4YG-5.2

5/3.7

18.1

4×φ41×39.3

φ16

φ22

220-240△/380-420Y/3/50 265-290△/440-480Y/3/60

18.7/10.8

107.7/62.2

120

Centrifugal lubrication

4YD-4.2

4/3

22.7/27.4

4×φ46×39.3

φ22

φ28

220-240△/380-420Y/3/50 265-290△/440-480Y/3/61

18.5/10.7

92.7/53.2

120

Centrifugal lubrication

4YG-6.2

6/4.4

22.7/27.4

4×φ46×39.3

φ22

φ28

220-240△/380-420Y/3/50 265-290△/440-480Y/3/61

22.9/13.2

107.7/62.2

120

Centrifugal lubrication

4YD-5.2

5/3.7

26.8

4×φ50×39.3

φ22

φ28

220-240△/380-420Y/3/50 265-290△/440-480Y/3/60

23.4/13.5

107.7/62.2

120

Centrifugal lubrication

85.5

4YG-7.2

7/5.1

26.8

4×φ50×39.3

φ22

φ28

220-240△/380-420Y/3/50 265-290△/440-480Y/3/60

27.5/15.9

142.8/82.4

120

Centrifugal lubrication

88.5

4YD-6.2

6/4.4

32.5

4×φ55×39.3

φ22

φ28

220-240△/380-420Y/3/50 265-290△/440-480Y/3/60

27.5/15.9

142.8/82.4

120

Centrifugal lubrication

90.5

4YG-9.2

9/6.6

32.5

4×φ55×39.3

φ22

φ28

220-240△/380-420Y/3/50 265-290△/440-480Y/3/60

34.5/20

142.8/82.4

120

Centrifugal lubrication

90.5

R134A

Model	Condensing Temperature℃		Coolinng Capacity Qo（W） Power Consumption Pe(kW)
			Evaporating Temperature ℃
			12.5		10		7.5		5		0		-5		-10		-15		-20		-25		-30
			50HZ	60HZ	50HZ	60HZ	50HZ	60HZ	50HZ	60HZ	50HZ	60HZ	50HZ	60HZ	50HZ	60HZ	50HZ	60HZ	50HZ	60HZ	50HZ	60HZ	50HZ	60HZ
4YD-8.2	30	Qo	38400	46080	35000	42000	31800	38160	28900	34680	23600	28320	19120	22944	15280	18336	12030	14436	9280	11136	6980	8376	5080	6096
	30	Pe	5.05	6.06	5.12	6.144	5.16	6.192	5.16	6.192	5.05	6.06	4.83	5.796	4.53	5.436	4.15	4.98	3.73	4.476	3.28	3.936	2.84	3.408
	40	Qo	33950	40740	30900	37080	28050	33660	25400	30480	20700	24840	16670	20004	13220	15864	10290	12348	7810	9372	5730	6876	3990	4788
	40	Pe	6.63	7.956	6.52	7.824	6.39	7.668	6.24	7.488	5.87	7.044	5.43	6.516	4.93	5.916	4.40	5.28	3.83	4.596	3.26	3.912	2.69	3.228
	50	Qo	29350	35220	26700	32040	24200	29040	21900	26280	17730	21276	14170	17004	11110	13332	8520	10224	6320	7584	4470	5364	2930	3516
	50	Pe	7.88	9.456	7.64	9.168	7.38	8.856	7.10	8.52	6.52	7.824	5.89	7.068	5.23	6.276	4.54	5.448	3.84	4.608	3.14	3.768	2.44	2.928
4YG-12.2	50	Qo	29100	34920	26400	31680	23900	28680	21550	25860	17390	20868	13810	16572	10750	12900	8140	9768	5940	7128		0		0
	50	Pe	7.51	9.012	7.33	8.796	7.12	8.544	6.88	8.256	6.34	7.608	5.73	6.876	5.06	6.072	4.37	5.244	3.66	4.392		0		0
	60	Qo	24450	29340	22150	26580	19990	23988	18000	21600	14420	17304	11340	13608	8710	10452	6460	7752	4560	5472		0		0
	60	Pe	8.49	10.188	8.18	9.816	7.86	9.432	7.51	9.012	6.79	8.148	6.02	7.224	5.21	6.252	4.40	5.28	3.58	4.296		0		0
	70	Qo	19850	23820	17950	21540	16170	19404	14520	17424	11540	13848	8970	10764	6760	8112	4880	5856	3290	3948		0		0
	70	Pe	9.15	10.98	8.75	10.5	8.33	9.996	7.91	9.492	7.04	8.448	6.14	7.368	5.24	6.288	4.33	5.196	3.43	4.116		0		0
4YD-10.2	30	Qo	44850	53820	40850	49020	37150	44580	33700	40440	27550	33060	22300	26760	17790	21348	13960	16752	10730	12876	8020	9624	5760	6912
	30	Pe	5.88	7.056	6.01	7.212	6.08	7.296	6.10	7.32	5.99	7.188	5.73	6.876	5.33	6.396	4.84	5.808	4.30	5.16	3.73	4.476	3.17	3.804
	40	Qo	39600	47520	36000	43200	32700	39240	29650	35580	24150	28980	19410	23292	15360	18432	11920	14304	9000	10800	6540	7848	4480	5376
	40	Pe	7.63	9.156	7.56	9.072	7.45	8.94	7.29	8.748	6.89	8.268	6.38	7.656	5.77	6.924	5.11	6.132	4.41	5.292	3.70	4.44	3.01	3.612
	50	Qo	34200	41040	31100	37320	28200	33840	25450	30540	20600	24720	16450	19740	12870	15444	9820	11784	7230	8676	5050	6060	3220	3864
	50	Pe	9.11	10.932	8.85	10.62	8.56	10.272	8.26	9.912	7.58	9.096	6.84	8.208	6.05	7.26	5.24	6.288	4.40	5.28	3.58	4.296	2.77	3.324
4YG-15.2	50	Qo	34700	41640	31450	37740	28450	34140	25650	30780	20650	24780	16350	19620	12680	15216	9560	11472	6930	8316		0		0
	50	Pe	8.78	10.536	8.54	10.248	8.28	9.936	8.00	9.6	7.36	8.832	6.65	7.98	5.88	7.056	5.07	6.084	4.24	5.088		0		0
	60	Qo	29250	35100	26500	31800	23900	28680	21500	25800	17170	20604	13450	16140	10270	12324	7550	9060	5260	6312		0		0
	60	Pe	9.80	11.76	9.44	11.328	9.06	10.872	8.67	10.404	7.83	9.396	6.94	8.328	6.01	7.212	5.05	6.06	4.07	4.884		0		0
	70	Qo	23850	28620	21550	25860	19380	23256	17380	20856	13770	16524	10650	12780	7960	9552	5670	6804	3720	4464		0		0
	70	Pe	10.58	12.696	10.12	12.144	9.64	11.568	9.15	10.98	8.14	9.768	7.09	8.508	6.00	7.2	4.89	5.868	3.76	4.512		0		0
4YD-12.2	30	Qo	50900	61080	46300	55560	42100	50520	38250	45900	31300	37560	25350	30420	20250	24300	15930	19116	12290	14748	9240	11088	6700	8040
	30	Pe	7.45	8.94	7.40	8.88	7.33	8.796	7.22	8.664	6.93	8.316	6.55	7.86	6.10	7.32	5.58	6.696	5.01	6.012	4.41	5.292	3.79	4.548
	40	Qo	45300	54360	41200	49440	37450	44940	33950	40740	27700	33240	22300	26760	17680	21216	13760	16512	10440	12528	7650	9180	5320	6384
	40	Pe	9.16	10.992	8.97	10.764	8.75	10.5	8.50	10.2	7.95	9.54	7.33	8.796	6.65	7.98	5.92	7.104	5.17	6.204	4.39	5.268	3.61	4.332
	50	Qo	39550	47460	35950	43140	32600	39120	29500	35400	23900	28680	19090	22908	14980	17976	11480	13776	8510	10212	6020	7224	3930	4716
	50	Pe	10.79	12.948	10.45	12.54	10.09	12.108	9.71	11.652	8.88	10.656	7.99	9.588	7.05	8.46	6.10	7.32	5.15	6.18	4.22	5.064	3.34	4.008
4YG-20.2	50	Qo	40250	48300	36500	43800	33000	39600	29800	35760	23950	28740	18970	22764	14690	17628	11040	13248	7940	9528				0
	50	Pe	10.42	12.504	10.11	12.132	9.77	11.724	9.41	11.292	8.63	10.356	7.77	9.324	6.85	8.22	5.88	7.056	4.89	5.868				0
	60	Qo	33900	40680	30650	36780	27650	33180	24850	29820	19850	23820	15530	18636	11830	14196	8690	10428	6020	7224
	60	Pe	11.65	13.98	11.20	13.44	10.72	12.864	10.22	12.264	9.18	11.016	8.10	9.72	6.98	8.376	5.84	7.008	4.70	5.64
	70	Qo	27500	33000	24850	29820	22350	26820	20000	24000	15840	19008	12240	14688	9150	10980	6520	7824	4300	5160
	70	Pe	12.59	15.108	12.01	14.412	11.42	13.704	10.82	12.984	9.57	11.484	8.30	9.96	7.02	8.424	5.75	6.9	4.52	5.424

Suction gas temperature 20℃,50Hz,without liquid subcooling.

Additional cooling or limited suction gas temperature.

R404A/R507A

Model	Condensing Temperature℃	Cooling Capacity Qo（W） Power Consumption Pe(kW)
		Evaporating Temperature ℃
			7.5	5	0	-5	-10	-15	-20	-25	-30	-35	-40	-45
4YD-8.2	30	Qo				33050	27250	22200	17890	14170	10990	8300	6040	4150
	30	Pe				8.74	8.17	7.55	6.87	6.16	5.41	4.64	3.86	3.07
	40	Qo				27750	22800	18480	14760	11560	8830	6520	4580	2960
	40	Pe				9.86	9.05	8.20	7.34	6.46	5.57	4.66	3.74	2.81
	50	Qo					18350	14790	11710	9070	6800	4880	3260
	50	Pe					9.74	8.71	7.68	6.65	5.61	4.55	3.46
4YG-12.2	30	Qo	51500	47200	39450	32750	26900	21900	17550	13830	10650	7960	5700
	30	Pe	8.63	8.63	8.49	8.22	7.81	7.29	6.68	6.00	5.26	4.48	3.68
	40	Qo	43500	39850	33300	27550	22600	18260	14530	11320	8590	6270	4320
	40	Pe	10.66	10.47	9.99	9.40	8.72	7.96	7.15	6.29	5.40	4.51	3.62
	50	Qo	35400	32400	27050	22350	18230	14650	11550	8880	6590	4650	3020
	50	Pe	12.28	11.93	11.17	10.33	9.42	8.45	7.45	6.42	5.39	4.36	3.36
4YD-10.2	30	Qo				38300	31600	25750	20700	16390	12690	9550	6910	4690
	30	Pe				10.07	9.37	8.64	7.87	7.06	6.22	5.34	4.43	3.48
	40	Qo				32300	26500	21500	17130	13400	10220	7520	5240	3350
	40	Pe				11.39	10.45	9.47	8.45	7.41	6.35	5.30	4.25	3.22
	50	Qo					21500	17290	13660	10550	7890	5640	3760
	50	Pe					11.26	10.04	8.80	7.53	6.28	5.05	3.88
4YG-15.2	30	Qo	61500	56400	47100	39050	32100	26000	20800	16320	12490	9240	6500
	30	Pe	10.23	10.19	9.96	9.58	9.06	8.43	7.70	6.90	6.04	5.14	4.23
	40	Qo	52200	47850	39950	33050	27050	21850	17360	13490	10190	7390	5020
	40	Pe	12.41	12.14	11.51	10.79	9.99	9.11	8.18	7.19	6.17	5.13	4.07
	50	Qo	42600	39000	32500	26750	21800	17430	13680	10460	7710	5380	3420
	50	Pe	14.27	13.78	12.78	11.73	10.66	9.55	8.43	7.28	6.11	4.94	3.75
4YD-12.2	30	Qo				44000	36250	29550	23750	18810	14580	11000	7980	5470
	30	Pe				11.88	11.15	10.30	9.35	8.35	7.30	6.23	5.19	4.18
	40	Qo				37300	30600	24800	19810	15510	11840	8740	6120	3950
	40	Pe				13.39	12.33	11.18	9.97	8.71	7.44	6.19	4.99	3.87
	50	Qo					24850	20000	15820	12210	9120	6510	4300
	50	Pe					13.28	11.83	10.37	8.91	7.45	6.01	4.60
4YG-20.2	30	Qo	71000	65100	54500	45250	37200	30250	24250	19070	14640	10860	7660
	30	Pe	12.24	12.20	11.94	11.47	10.82	10.04	9.14	8.16	7.12	6.07	5.02
	40	Qo	60500	55400	46250	38200	31250	25200	20000	15530	11730	8510	5820
	40	Pe	14.78	14.49	13.79	12.91	11.91	10.80	9.62	8.40	7.16	5.95	4.78
	50	Qo	49900	45650	37900	31100	25250	20150	15760	12010	8840	6180	3980
	50	Pe	16.78	16.28	15.18	13.95	12.63	11.24	9.81	8.38	6.97	5.63	4.37

Based on 20℃ suction gas temperature,50Hz,without liquid subcooling.

Additional cooling or limited suction gas temperature.

Additional cooling and CIC system.

What is the nominal power range of the DMZL 4-Cylinder Semi-Hermetic Compressor?

The compressor has a nominal power range of 8–20HP (corresponding to 5.9–14.7kW), with specific models (e.g., 4YD-8.2, 4YG-20.2) covering different power levels in this range.

Which refrigerants are compatible with this compressor?

It supports four common refrigerants for low/mid-temperature refrigeration:

• R404A

• R507A

• R134A

• R22

What power supply options are available for the compressor?

Multiple standard and customized power supply configurations are offered:

• 220~240V/50Hz/3Ph

• 380~420V/50Hz/3Ph

• 440~480V/60Hz/3Ph

• Dual-power-supply customized motor (on request)

What application scenarios is this compressor suitable for?

It is designed for industrial-scale cooling needs, mainly including two core scenarios:

1. Large-Scale Cold Storage & Warehousing: Powers walk-in freezers and 1,000–5,000㎡ bulk cold storage (for frozen meats, seafood, agricultural products), maintaining temperatures as low as -45°C (with R404A/R507A). It also supports multi-compressor parallel systems for food/pharmaceutical distribution centers.

2. Industrial Manufacturing & Commercial Freezing: Cools machinery in plastic extrusion, chemical production, and electronics manufacturing (5.5–15kW cooling capacity); drives large frozen food islands in hypermarkets and industrial ice-making machines.

What is the service life of the compressor, and how is it ensured?

The compressor has a service life of 15+ years, guaranteed by three key designs:

• Forced-Lubrication System: Ensures continuous oil supply to critical components (crankshaft, bearings) under high loads, reducing wear.

• Semi-Hermetic Sealing: Integral motor-compressor casting eliminates shaft seals, minimizing refrigerant leakage (≤0.1% annual leakage rate).

• Wear-Resistant Components: Chrome-plated piston rings, hardened alloy steel crankshafts, and imported impact-resistant spring steel valve reeds withstand high pressure and frequent cycling.

Product Description

Technical Specifications

Cooling Performance

FAQ