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Semi-Hermetic Reciprocating Compressor R22/R507A

Professional Compresor Manufacturer Semi-Hermetic Reciprocating Compressor R22 R404A R134A R507A

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Industrial Refrigeration Semi Hermetic Compressors | Reliable & Durable | DM COPELAND Compressor

ZHEJIANG DAMING REFRIGERATION offers high-performance & compact design industrial reciprocating compressors for food storage, environmental comfort, and manufacturing. Durable, energy-efficient, and low-maintenance. We provide profrofessional refrigeation solution for your cold room projects, call us now!

Power supply:	380-420/3/50 440-480/3/60 220-240/3/50
Lubricant:	R134A R22 R404A R507A
Horse power:	25HP 20HP 30HP 15HP
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Model:
4SG/4SD
Brand:
DMZL

Reciprocating Compressor R22/R507A reciprocating compressor semi-hermetic reciprocating compressor

Product Description

Technical Specifications

Cooling Performance

FAQ

Product Overview & Scenario Solutions

As a flagship product of Zhejiang Daming Refrigeration—with over 30 years of expertise in semi-hermetic compressor manufacturing—the 4SG/4SD series is engineered to address cooling pain points across food storage, industrial production, and commercial comfort systems. Its multi-refrigerant compatibility (R22, R404A, R134A, R507A) and compact design make it a go-to solution for:

• Food Cold Storage Facilities: Maintains stable temperatures (-18℃ to 5℃) in 100-500 m³ cold rooms, supporting daily restocking of 5-10 tons of frozen meats, dairy, or fresh produce without temperature fluctuations that risk spoilage.

• Industrial Manufacturing Lines: Cools heat-generating equipment like hydraulic systems, plastic injection molds, and electronic control panels in factories, ensuring consistent production under 30-45℃ ambient conditions.

• Mid-Sized Commercial Spaces: Powers central air conditioning for 5,000-10,000 m² office buildings and shopping malls, balancing cooling efficiency with low operational noise (≤75 dBA) to enhance user comfort.

Semi-Hermetic Reciprocating Compressor R22/R507A

Design & Material Advantages

Precision Manufacturing for Leak-Proof Performance

The compressor features a semi-hermetic integrated structure (motor and crankcase cast as one unit), eliminating refrigerant leakage risks (leak rate < 0.1 g/year). Key manufacturing processes ensure reliability:

• CNC processing centers for cylinder bore machining (tolerance ±0.005mm) to minimize internal friction and energy loss.

• Automated assembly lines and ultrasonic cleaning systems to remove debris from components, preventing valve or bearing damage.

• 24-hour runtime testing in advanced laboratories to validate performance under varying load conditions.

High-Durability Material Selection

• Crankcase & Cylinder Block: High-strength cast iron (HT300) with anti-corrosion treatment, supporting continuous operation for 15,000+ hours without structural wear.

• Pistons & Piston Rings: Lightweight aluminum alloy pistons paired with chrome-plated rings (wear resistance ≥ 5,000 hours), reducing mechanical resistance and improving energy efficiency.

• Valve Components: Imported spring steel (SUP9) for suction and discharge valves, ensuring fast response times and low vibration during operation.

6Drawing 4Drawing Drawing

Technical Support & After-Sales Service

Pre-Sales Technical Consulting

• Free cooling system design services, including load calculation and compressor matching for cold rooms, industrial lines, or commercial spaces.

• Multi-language operation manuals and installation videos to guide on-site teams during setup.

In-Use Maintenance Support

• Customized maintenance plans: Lubricating oil replacement every 4,000 hours, valve plate inspection every 10,000 hours, and 24/7 online troubleshooting for urgent issues.

• Global spare parts warehouses (Shanghai, Dubai, Houston) ensuring fast delivery of replacement components (3-7 days for most regions).

Customization & Warranty Terms

• OEM/ODM services for non-standard voltage (e.g., 220-240V/3/50) or frequency (60Hz) requirements to match regional power grids.

• 18-month standard warranty (36 months for core components like crankshafts and motors) to cover manufacturing defects.

• Logistics flexibility: MOQ 10 units, monthly production capacity 5,000 units, and shipment from Ningbo port with support for L/C or T/T payment terms.

C TYPE 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)

4S151D

15/10.5

73.7

4×φ70×55

Φ28

Φ42

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

81/132

140

Forced-lubrication

183

4S251G

25/18.5

73.7

4×φ70×55

Φ28

Φ54

4.5

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

116/193

140

Forced-lubrication

203

4S201D

20/15

84.6

4×φ75×55

Φ28

Φ54

4.5

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

97/158

140

Forced-lubrication

192

4S301G

30/22

84.6

4×φ75×55

Φ28

Φ54

4.5

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

135/220

140

Forced-lubrication

206

Model	Condensing Temperature℃	Cooling Capacity Qo（W） Power Consumption Pe(kW)
			Evaporating Temperature ℃
			12.5	10	7.5	5	0	-5	-10	-15	-20	-25	-30	-35	-40	-45	-50
4S151D	30	Qo						52300	42700	34450	27350	21300	16400	12000	8310
	30	Pe						12.73	11.93	11.01	9.98	8.82	8.25	7.13	5.98
	40	Qo						46850	38100	30500	24050	18500	13840	9800	6440
	40	Pe						14.91	13.81	12.56	11.19	9.76	8.67	7.3	5.9
	50	Qo						41700	33700	26800	20900	15800	11500	7920	4970
	50	Pe						17.11	15.67	14.13	12.47	10.85	9.21	7.53	5.79
4S251G	30	Qo	99300	91200	83600	76500	63700	52600	42950	34650	27500	21400	16260
	30	Pe	13.89	13.74	13.56	13.34	12.84	12.22	11.48	10.63	9.67	8.59	7.41
	40	Qo	89700	82300	75400	68900	57300	47150	38350	30800	24250	18670	13940
	40	Pe	16.75	16.47	16.16	15.82	15.05	14.17	13.18	12.07	10.85	9.52	8.08
	50	Qo	80500	73800	67600	61700	51100	41950	33950	27050	21100	16030
	50	Pe	19.56	19.16	18.74	18.27	17.25	16.1	14.83	13.44	11.94	10.33
4S201D	30	Qo						60000	48950	39500	31400	24500	18940	13920	9670
	30	Pe						14.64	13.67	12.63	11.51	10.29	9.65	8.4	7.1
	40	Qo						53700	43700	35100	27750	21500	16080	11430	7530
	40	Pe						17.39	16.04	14.6	13.07	11.42	10.35	8.75	7.14
	50	Qo						47800	38750	30950	24200	18350	13390	9230	5790
	50	Pe						20.1	18.4	16.65	14.89	13.14	11.23	9.19	7.06
4S301G	30	Qo	114200	104800	96000	87800	73100	60400	49300	39800	31650	24700	18840
	30	Pe	16.42	16.23	16.01	15.74	15.11	14.33	13.44	12.45	11.36	10.21	9
	40	Qo	103000	94500	86500	79100	65700	54000	44000	35350	27950	21650	16330
	40	Pe	19.78	19.46	19.09	18.68	17.74	16.67	15.49	14.2	12.83	11.4	9.92
	50	Qo	92300	84600	77400	70700	58600	48100	39000	31200	24500	18810
	50	Pe	23.4	22.9	22.3	21.7	20.4	19.04	17.57	16.05	11.49	12.91
Based on 20℃ suction gas temperature,50Hz,without liquid subcooling.
	VARICOOL system,additional cooling,position of suction valve changed.
	Additional cooling or limited suction gas temperature.
	Additional cooling and CIC system.

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
4S151D	30	Qo				58500	48400	39700	32200	25750	20250	15560	11630	8350
	30	Pe				15.78	14.84	13.79	12.63	11.40	10.10	8.77	7.43	6.10
	40	Qo				49850	41150	33600	27100	21500	16730	12660	9240	6380
	40	Pe				18.16	16.80	15.34	13.82	12.25	10.65	9.05	7.47	5.93
	50	Qo					33950	27600	22050	17330	13270	9820	6920
	50	Pe					18.50	16.67	14.80	12.91	11.03	9.17	7.37
4S251G	30	Qo	90700	83200	69700	57900	47750	38950	31350	24800	19210	14460	10460
	30	Pe	16.14	16.07	15.72	15.14	14.36	13.41	12.32	11.11	9.81	8.46	7.08
	40	Qo	77400	71000	59500	49400	40650	33000	26450	20800	15930	11800	8320
	40	Pe	19.56	19.22	18.37	17.32	16.11	14.76	13.31	11.78	10.20	8.60	7.00
	50	Qo	64500	59100	49500	41000	33600	27200	21600	16830	12740	9260	6340
	50	Pe	22.78	22.18	20.84	19.33	17.71	15.98	14.18	12.34	10.49	8.65	6.86
4S201D	30	Qo				67100	55500	45400	36750	29350	23000	17600	13060	9260
	30	Pe				18.22	17.12	15.89	14.55	13.12	11.62	10.08	8.53	6.97
	40	Qo				57200	47300	38700	31200	24800	19250	14540	10540	7160
	40	Pe				20.94	19.36	17.68	15.93	14.13	12.30	10.47	8.65	6.89
	50	Qo					38750	31650	25450	20100	15480	11510	8120
	50	Pe					21.25	19.15	17.02	14.87	12.73	10.63	8.60
4S301G	30	Qo	103800	95300	79900	66500	54900	44900	36250	28800	22450	17040	12480
	30	Pe	19.21	19.07	18.57	17.81	16.84	15.70	14.41	13.02	11.57	10.09	8.61
	40	Qo	89100	81800	68600	57000	47000	38250	30700	24200	18610	13860	9850
	40	Pe	23.37	22.88	21.73	20.38	18.88	17.26	15.56	13.81	12.06	10.33	8.68
	50	Qo	74300	68200	57100	47400	38900	31500	25100	19580	14840	10810	7410
	50	Pe	27.01	26.20	24.46	22.58	20.60	18.56	16.50	14.45	12.45	10.54	8.76
Based on 20℃ suction gas temperature,50Hz,without liquid subcooling.
	Additional cooling or limited suction gas temperature.
	Additional cooling and CIC system.

Model	Condensing Temperature℃	Cooling Capacity Qo（W） Power Consumption Pe(kW)
			Evaporating Temperature ℃
			12.5	10	7.5	5	0	-5	-10	-15	-20	-25	-30
4S151D	30	Qo	69100	62800	57000	51600	49150	33700	26700	20850	15920	11840	8500
	30	Pe	10.40	10.07	9.74	9.41	8.74	8.07	7.38	6.67	5.95	5.20	4.42
	40	Qo	61300	55700	50400	45600	37000	29600	23350	18100	13700	10060	7080
	40	Pe	12.46	11.93	11.43	10.93	9.97	9.04	8.13	7.23	6.32	5.39	4.44
	50	Qo	54100	49050	44400	40100	32400	25800	20250	15570	11660	8430	5800
	50	Pe	14.24	13.54	12.87	12.22	10.99	9.81	8.69	7.59	6.51	5.43	4.34
4S251G	50	Qo	54100	49050	44400	40100	32400	25800	20250	15570	11660
	50	Pe	13.77	13.13	12.52	11.92	10.78	9.68	8.62	7.58	6.55
	60	Qo	47100	42700	38600	34800	28000	22200	17320	13190	9760
	60	Pe	15.04	14.27	13.53	12.81	11.44	10.13	8.89	7.69	6.53
	70	Qo	40250	36450	32900	29600	23750	18740	14500	10940	7980
	70	Pe	16.09	15.21	14.36	13.53	11.96	10.48	9.07	7.74	6.45
4S201D	30	Qo	78500	71400	64800	58600	47700	38350	30450	23800	18190	13560	9770
	30	Pe	12.45	12.15	11.83	11.50	10.78	10.00	9.16	8.26	7.31	6.32	5.28
	40	Qo	69700	63300	57400	51900	42100	33750	26650	20700	15700	11570	8190
	40	Pe	14.65	14.14	13.62	13.09	12.03	10.95	9.85	8.73	7.59	6.44	5.28
	50	Qo	61500	55800	50500	45650	36950	29500	23200	17870	13430	9760	6770
	50	Pe	16.67	15.93	15.20	14.48	13.06	11.67	10.31	8.97	7.66	6.37	5.10
4S301G	50	Qo	61500	55800	50500	45650	36950	29500	23200	17870	13430
	50	Pe	16.09	15.42	14.76	14.10	12.79	11.50	10.22	8.94	7.67
	60	Qo	53700	48650	44000	39700	32000	25450	19890	15210	11300
	60	Pe	17.65	16.80	15.96	15.14	13.54	11.99	10.49	9.03	7.60
	70	Qo	45900	41600	37600	33850	27200	21550	16720	12680	9320
	70	Pe	19.22	18.16	17.14	16.15	14.25	12.46	10.75	9.12	7.55
Suction gas temperature 20℃,50Hz,without liquid subcooling.
	Additional cooling or limited suction gas temperature.

What are the structural design features of the compressor, and what problems can they solve?

It adopts a semi-hermetic integrated structure (the motor and crankcase are cast as one), which can significantly reduce the risk of refrigerant leakage, with a leakage rate of <0.1g/year. Meanwhile, the cylinder bore is processed by a CNC machining center (with a tolerance of ±0.005mm), reducing internal friction and energy consumption, and improving operating efficiency.

What materials are used for key components, and what durability advantages do they have?

Crankcase and cylinder block: High-strength HT300 cast iron (treated with anti-corrosion), supporting continuous operation for more than 15,000 hours without structural wear.
Piston and piston ring: Lightweight aluminum alloy piston + chromed piston ring, with a wear-resistant duration of ≥5,000 hours, reducing mechanical resistance and improving energy efficiency.
Valve assembly: Imported SUP9 spring steel (suction and discharge valves), featuring fast response speed and low vibration during operation.

What processes are used in the production process to ensure reliability?

These include an automated assembly line, ultrasonic cleaning of parts (to avoid damage to valves/bearings), and a 24-hour laboratory load test before delivery, ensuring stable performance under different working conditions.

Product Description

Technical Specifications

Cooling Performance

FAQ