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DMZL 4-Cylinder Semi-Hermetic Piston Compressor

DMZL Semi Hermetic Piston Compressor 4 Cylinder low temp mid temperature

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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:	3HP 4HP 5HP 6HP 7HP 9HP
Color:	RAL 7033 BLUE
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:	R22 R404A R134A R507A
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Model:
4YD/4YG
Brand:
DMZL

Semi-Hermetic Piston Compressor Piston Compressor 4-Cylinder Semi-Hermetic Piston Compressor DMZL Piston Compressor

Product Description

Technical Specifications

Cooling Performance

FAQ

DMZL 4-Cylinder Semi-Hermetic Piston Compressor

Product Overview & Scenario-Specific Solutions

As a core component for medium-power refrigeration systems, the DMZL 4-Cylinder Semi-Hermetic Piston Compressor is engineered to deliver reliable, energy-efficient cooling for low and mid-temperature applications. It bridges the gap between fully hermetic and open compressors, combining excellent sealing performance with on-site serviceability—making it a top choice for industries requiring stable temperature control.

Food Storage & Refrigerated Logistics

• Cold Storage Facilities: Maintains consistent temperatures (-30°C to 12.5°C) for fresh produce, frozen foods, and dairy products, preventing spoilage and extending shelf life.

• Refrigerated Trucks/Vans: With its compact design and anti-leakage structure, it adapts to mobile refrigeration demands, ensuring cargo like meats and pharmaceuticals stay within safe temperature ranges during transit.

Commercial & Industrial Cooling

• Refrigerated Display Cabinets: Ideal for supermarkets, convenience stores, and restaurants, it powers display cases for beverages, desserts, and pre-packaged foods without occupying excessive space.

• Manufacturing Cooling: Supports temperature-sensitive manufacturing processes (e.g., plastic molding, pharmaceutical production) by stabilizing cooling systems with medium power needs (2.2–6.6kW).

Engineered Design & Premium Materials

The compressor’s performance is rooted in precision engineering and durable components, ensuring long-term operation with minimal maintenance:

• Semi-Hermetic Integration: Motor and compressor body are integrally cast, sharing a sealed crankcase-motor housing. This eliminates the need for shaft seals, solving leakage issues common in open compressors.

• High-Precision Machining: CNC processing centers ensure concentricity of moving parts, reducing dead space and improving compression efficiency.

• Wear-Resistant Components: Chrome-plated piston rings, aluminum pistons, and hardened crankshafts minimize friction; low-friction bearings further extend service life.

• Eco-Friendly Refrigerant Compatibility: Works seamlessly with R22, R404A, R134A, and R507A—supporting global environmental standards for low-GWP (Global Warming Potential) cooling.

DMZL 4-Cylinder Semi-Hermetic Piston Compressor

Technical Support & After-Sales Services

• Customized Power Supply: Offers dual-power motor customization to match regional electrical standards (220-240V, 380-420V, 440-480V).

• Motor Protection: Internal PTC sensors (3-wire) and external protection modules (6-wire) prevent overheating and electrical failures.

• Maintenance & Spare Parts: Provides 12-month warranty, free maintenance guides, and fast delivery of general spare parts (valve plates, piston rings) within 3–5 business days.

• Technical Consultation: 24/7 online support for cooling capacity matching (based on R134A/R404A/R507A) and system integration advice.

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-8.2

8/5.5

41.3

4×φ60×42

φ28

φ35

2.6

380-420YY/3/50 440-480YY/3/60

49/81

120

Centrifugal lubrication

134

4YG-10.2

10/7.5

34.7

4×φ55×42

φ22

φ28

2.6

380-420YY/3/50 440-480YY/3/60

59/99

140

Centrifugal lubrication

139

4YG-12.2

12/8.8

41.3

4×φ60×42

φ28

φ35

2.6

380-420YY/3/50 440-480YY/3/60

69/113

140

Centrifugal lubrication

141

4YD-10.2

10/7.5

48.5

4×φ65×42

φ28

φ35

2.6

380-420YY/3/50 440-480YY/3/60

59/99

140

Centrifugal lubrication

139

4YG-15.2

15/10.5

48.5

4×φ65×42

φ28

φ35

2.6

380-420YY/3/50 440-480YY/3/60

81/132

140

Centrifugal lubrication

147

4YD-12.2

12/8.8

56.2

4×φ70×42

φ28

φ35

2.6

380-420YY/3/50 440-480YY/3/60

69/113

140

Centrifugal lubrication

141

4YG-20.2

20/15

56.2

4×φ70×42

φ28

φ42

2.6

380-420YY/3/50 440-480YY/3/60

97/158

140

Centrifugal lubrication

150

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-3.2	30	Qo	15960	19152	14520	17424	13190	15828	11960	14352	9760	11712	7870	9444	6260	7512	4900	5880	3740	4488	2780	3336	1970	2364
	30	Pe	2.23	2.676	2.21	2.652	2.19	2.628	2.15	2.58	2.07	2.484	1.95	2.34	1.81	2.172	1.65	1.98	1.47	1.764	1.26	1.512	1.04	1.248
	40	Qo	14070	16884	12790	15348	11610	13932	10510	12612	8540	10248	6860	8232	5420	6504	4190	5028	3160	3792	2290	2748	1570	1884
	40	Pe	2.64	3.168	2.60	3.12	2.55	3.06	2.49	2.988	2.36	2.832	2.20	2.64	2.02	2.424	1.81	2.172	1.58	1.896	1.33	1.596	1.05	1.26
	50	Qo	12250	14700	11130	13356	10090	12108	9120	10944	7390	8868	5900	7080	4630	5556	3540	4248	2630	3156	1860	2232	1220	1464
	50	Pe	3.04	3.648	2.96	3.552	2.88	3.456	2.80	3.36	2.61	3.132	2.41	2.892	2.19	2.628	1.94	2.328	1.66	1.992	1.36	1.632	1.02	1.224
4YG-5.2	50	Qo	12200	14640	11090	13308	10060	12072	9090	10908	7370	8844	5890	7068	4620	5544	3540	4248	2630	3156		0		0
	50	Pe	3.19	3.828	3.11	3.732	3.02	3.624	2.93	3.516	2.72	3.264	2.49	2.988	2.24	2.688	1.97	2.364	1.67	2.004		0		0
	60	Qo	10490	12588	9530	11436	8630	10356	7800	9360	6300	7560	5010	6012	3900	4680	2960	3552	2160	2592		0		0
	60	Pe	3.59	4.308	3.49	4.188	3.37	4.044	3.25	3.9	3.00	3.6	2.72	3.264	2.42	2.904	2.09	2.508	1.74	2.088		0		0
	70	Qo	8800	10560	7990	9588	7230	8676	6530	7836	5260	6312	4160	4992	3210	3852	2410	2892	1720	2064		0		0
	70	Pe	3.99	4.788	3.85	4.62	3.71	4.452	3.57	4.284	3.27	3.924	2.94	3.528	2.58	3.096	2.20	2.64	1.79	2.148		0		0
4YD-4.2	30	Qo	20700	24840	18850	22620	17120	20544	15510	18612	12660	15192	10220	12264	8160	9792	6410	7692	4960	5952	3750	4500	2760	3312
	30	Pe	2.80	3.36	2.84	3.408	2.86	3.432	2.86	3.432	2.82	3.384	2.72	3.264	2.57	3.084	2.38	2.856	2.16	2.592	1.91	2.292	1.64	1.968
	40	Qo	18210	21852	16550	19860	15020	18024	13600	16320	11060	13272	8900	10680	7050	8460	5490	6588	4190	5028	3100	3720	2200	2640
	40	Pe	3.48	4.176	3.47	4.164	3.44	4.128	3.39	4.068	3.25	3.9	3.06	3.672	2.83	3.396	2.55	3.06	2.25	2.7	1.92	2.304	1.58	1.896
	50	Qo	15740	18888	14300	17160	12960	15552	11720	14064	9500	11400	7600	9120	5970	7164	4590	5508	3420	4104	2450	2940	1640	1968
	50	Pe	4.13	4.956	4.06	4.872	3.98	4.776	3.88	4.656	3.64	4.368	3.36	4.032	3.03	3.636	2.67	3.204	2.27	2.724	1.86	2.232	1.42	1.704
4YG-6.2	50	Qo	15710	18852	14270	17124	12940	15528	11710	14052	9490	11388	7600	9120	5970	7164	4590	5508	3430	4116		0		0
	50	Pe	4.16	4.992	4.09	4.908	4.00	4.8	3.89	4.668	3.65	4.38	3.35	4.02	3.02	3.624	2.65	3.18	2.24	2.688		0		0
	60	Qo	13350	16020	12120	14544	10970	13164	9900	11880	7990	9588	6340	7608	4920	5904	3710	4452	2690	3228		0		0
	60	Pe	4.81	5.772	4.68	5.616	4.53	5.436	4.37	5.244	4.01	4.812	3.61	4.332	3.17	3.804	2.70	3.24	2.21	2.652		0		0
	70	Qo	11030	13236	10000	12000	9030	10836	8140	9768	6520	7824	5110	6132	3910	4692	2870	3444	1990	2388		0		0
	70	Pe	5.44	6.528	5.24	6.288	5.03	6.036	4.81	5.772	4.34	5.208	3.83	4.596	3.28	3.936	2.71	3.252	2.11	2.532		0		0
4YD-5.2	30	Qo	24600	29520	22450	26940	20400	24480	18510	22212	15140	18168	12250	14700	9790	11748	7700	9240	5930	7116	4440	5328	3210	3852
	30	Pe	3.61	4.332	3.55	4.26	3.49	4.188	3.42	4.104	3.26	3.912	3.08	3.696	2.86	3.432	2.62	3.144	2.35	2.82	2.05	2.46	1.72	2.064
	40	Qo	21700	26040	19750	23700	17940	21528	16270	19524	13260	15912	10690	12828	8480	10176	6610	7932	5030	6036	3700	4440	2600	3120
	40	Pe	4.30	5.16	4.21	5.052	4.12	4.944	4.02	4.824	3.79	4.548	3.53	4.236	3.23	3.876	2.91	3.492	2.56	3.072	2.17	2.604	1.75	2.1
	50	Qo	18880	22656	17170	20604	15580	18696	14110	16932	11460	13752	9190	11028	7240	8688	5590	6708	4190	5028	3020	3624	2050	2460
	50	Pe	4.96	5.952	4.84	5.808	4.71	5.652	4.57	5.484	4.27	5.124	3.93	4.716	3.56	4.272	3.15	3.78	2.71	3.252	2.23	2.676	1.73	2.076
4YG-7.2	50	Qo	18800	22560	17100	20520	15520	18624	14050	16860	11430	13716	9170	11004	7230	8676	5580	6696	4190	5028		0		0
	50	Pe	4.99	5.988	4.86	5.832	4.73	5.676	4.58	5.496	4.27	5.124	3.92	4.704	3.54	4.248	3.13	3.756	2.69	3.228		0		0
	60	Qo	16160	19392	14680	17616	13310	15972	12030	14436	9750	11700	7770	9324	6090	7308	4650	5580	3440	4128		0		0
	60	Pe	5.62	6.744	5.46	6.552	5.28	6.336	5.10	6.12	4.70	5.64	4.28	5.136	3.82	4.584	3.33	3.996	2.80	3.36		0		0
	70	Qo	13580	16296	12330	14796	11170	13404	10080	12096	8140	9768	6460	7752	5020	6024	3800	4560	2770	3324		0		0
	70	Pe	6.27	7.524	6.06	7.272	5.84	7.008	5.61	6.732	5.13	6.156	4.63	5.556	4.09	4.908	3.51	4.212	2.90	3.48		0		0
4YD-6.2	30	Qo	29550	35460	26900	32280	24450	29340	22200	26640	18170	21804	14720	17664	11770	14124	9270	11124	7170	8604	5410	6492	3950	4740
	30	Pe	4.35	5.22	4.28	5.136	4.20	5.04	4.10	4.92	3.89	4.668	3.64	4.368	3.35	4.02	3.04	3.648	2.70	3.24	2.33	2.796	1.95	2.34
	40	Qo	26000	31200	23650	28380	21500	25800	19490	23388	15910	19092	12830	15396	10210	12252	7980	9576	6100	7320	4520	5424	3210	3852
	40	Pe	5.25	6.3	5.13	6.156	5.00	6	4.85	5.82	4.54	5.448	4.18	5.016	3.80	4.56	3.38	4.056	2.94	3.528	2.48	2.976	2.00	2.4
	50	Qo	22550	27060	20500	24600	18630	22356	16880	20256	13740	16488	11040	13248	8730	10476	6760	8112	5100	6120	3700	4440	2540	3048
	50	Pe	6.08	7.296	5.90	7.08	5.72	6.864	5.53	6.636	5.11	6.132	4.66	5.592	4.17	5.004	3.66	4.392	3.13	3.756	2.57	3.084	1.99	2.388
4YG-9.2	50	Qo	22550	27060	20550	24660	18640	22368	16890	20268	13750	16500	11040	13248	8730	10476	6770	8124	5100	6120		0		0
	50	Pe	6.07	7.284	5.90	7.08	5.72	6.864	5.53	6.636	5.12	6.144	4.66	5.592	4.18	5.016	3.66	4.392	3.12	3.744		0		0
	60	Qo	19250	23100	17500	21000	15870	19044	14360	17232	11650	13980	9320	11184	7320	8784	5620	6744	4180	5016		0		0
	60	Pe	6.86	8.232	6.63	7.956	6.39	7.668	6.14	7.368	5.62	6.744	5.07	6.084	4.49	5.388	3.89	4.668	3.25	3.9		0		0
	70	Qo	15970	19164	14520	17424	13160	15792	11900	14280	9620	11544	7660	9192	5980	7176	4560	5472	3350	4020		0		0
	70	Pe	7.57	9.084	7.29	8.748	6.99	8.388	6.69	8.028	6.07	7.284	5.43	6.516	4.76	5.712	4.06	4.872	3.34	4.008		0		0

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-3.2	30	Qo				13720	11330	9260	7470	5940	4630	3510	2580	1800
	30	Pe				3.85	3.66	3.44	3.18	2.90	2.58	2.24	1.88	1.50
	40	Qo				11560	9520	7740	6200	4880	3750	2790	1980	1310
	40	Pe				4.42	4.10	3.76	3.40	3.03	2.63	2.23	1.82	1.40
	50	Qo				9450	7740	6260	4970	3860	2910	2110	1430
	50	Pe				4.91	4.48	4.04	3.59	3.13	2.67	2.22	1.77
4YG-5.2	30	Qo	21550	19790	16590	13810	11400	9320	7520	5970	4650	3530	2580
	30	Pe	3.78	3.79	3.76	3.67	3.52	3.32	3.07	2.79	2.48	2.15	1.81
	40	Qo	18240	16740	14020	11650	9580	7790	6240	4900	3760	2790	1970
	40	Pe	4.65	4.60	4.46	4.25	3.99	3.69	3.35	2.98	2.59	2.18	1.76
	50	Qo	14970	13730	11470	9500	7780	6280	4980	3860	2900	2090	1410
	50	Pe	5.44	5.33	5.07	4.75	4.39	3.98	3.55	3.10	2.62	2.14	1.65
4YD-4.2	30	Qo				17330	14290	11660	9400	7450	5800	4390	3210	2220
	30	Pe				4.61	4.39	4.12	3.81	3.45	3.06	2.65	2.22	1.78
	40	Qo				14440	11870	9650	7720	6070	4650	3450	2440	1590
	40	Pe				5.28	4.93	4.53	4.10	3.64	3.15	2.65	2.14	1.63
	50	Qo				11650	9550	7720	6130	4760	3590	2590	1750
	50	Pe				5.86	5.39	4.87	4.33	3.77	4.19	2.60	2.02
4YG-6.2	30	Qo	27500	25200	21100	17580	14500	11830	9530	7550	5860	4420	3210
	30	Pe	4.73	4.75	4.73	4.62	4.43	4.17	3.85	3.48	3.08	2.65	2.21
	40	Qo	23150	21250	17780	14750	12120	9840	7860	6160	4700	3470	2420
	40	Pe	5.87	5.81	5.62	5.35	5.01	4.61	4.17	3.68	3.17	2.65	2.12
	50	Qo	18930	17360	14490	11980	9790	7890	6240	4820	3600	2570	1710
	50	Pe	6.86	6.72	6.37	5.95	5.47	4.95	4.38	3.79	3.19	2.58	1.97
4YD-5.2	30	Qo				21100	17420	14220	11470	9100	7080	5370	3930	2730
	30	Pe				5.52	5.29	4.99	4.62	4.18	3.70	3.19	2.66	2.11
	40	Qo				17650	14520	11810	9460	7440	5720	4250	3010	1980
	40	Pe				6.34	5.95	5.50	4.99	4.43	3.83	3.22	2.60	1.98
	50	Qo				14300	11730	9490	7550	5880	4440	3220	2190
	50	Pe				7.07	6.53	5.93	5.29	4.62	3.92	3.22	2.52
4YG-7.2	30	Qo	32600	29900	25000	20800	17120	13950	11210	8860	6860	5160	3720
	30	Pe	5.49	5.52	5.51	5.39	5.18	4.88	4.52	4.10	3.63	3.12	2.59
	40	Qo	27500	25200	21100	17490	14350	11630	9270	7250	5510	4040	2800
	40	Pe	6.81	6.75	6.55	6.26	5.88	5.43	4.91	4.35	3.74	3.11	2.47
	50	Qo	22500	20600	17210	14230	11620	9350	7380	5690	4240	3010	1980
	50	Pe	7.98	7.83	7.46	7.00	6.46	5.86	5.20	4.50	3.78	3.03	2.28
4YD-6.2	30	Qo				24950	20650	16900	13670	10900	8540	6530	4840	3420
	30	Pe				6.65	6.36	5.98	5.52	5.01	4.45	3.86	3.25	2.63
	40	Qo				21100	17420	14200	11420	9030	6980	5240	3770	2540
	40	Pe				7.64	7.17	6.63	6.03	5.37	4.67	3.94	3.20	2.47
	50	Qo				17320	14220	11520	9190	7180	5460	4000	2770
	50	Pe				8.61	7.98	7.28	6.51	5.71	4.87	4.01	3.14
4YG-9.2	30	Qo	38800	35600	29900	24900	20600	16880	13660	10890	8530	6530	4840
	30	Pe	6.85	6.87	6.82	6.64	6.36	5.98	5.53	5.01	4.45	3.86	3.25
	40	Qo	32850	30150	25300	21100	17410	14210	11440	9050	7000	5250	3770
	40	Pe	8.35	8.27	8.01	7.64	7.18	6.63	6.02	5.36	4.66	3.94	3.20
	50	Qo	27050	24850	20900	17380	14310	11620	9280	7240	5480	3960	2660
	50	Pe	9.80	9.62	9.16	8.61	7.98	7.28	6.52	5.71	4.87	4.01	3.14