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Low-Temp Cast Iron Semi Hermetic Water Cooled Screw Chiller

Semi-hermetic & Screw Compressor Unit Water Cooled Chiller 0~-20℃

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· FOB Price: Negotiable
· Min.Order Quantity: 1 0Piece
· Producing Capacity: 5000 Pieces per Month
· Port: Ningbo
· Payment Terms: L/C,T/T
· Origin plant: Zhejiang,China
· Compressor Body Material: Iron
· Application: Refrigeration
· Refrigerant: R22, R134A, R404A，R507C, R407C
· Power(V/Ф/Hz ): 380-420/3/50, 440-480/3/60
· Certification: CE, CCC, ISO9001,etc
· Cross reference: BITZER, COPELAND, INVOTECH

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Semi Hermetic Water Cooled Screw Chiller Water Cooled Screw Chiller Cast Iron Screw Chiller Low-Temp Cast Iron Screw Chiller

Product Description

Technical Specifications

FAQ

Scene-Specific Solutions for Deep Low-Temperature Needs

Traditional chillers often struggle to maintain stable cooling in extreme low-temperature scenarios, leading to product spoilage or process failures. Our Semi-hermetic Screw Compressor Water Cooled Chiller (-5~-40℃) solves this pain point for three core industries:

Food Freezing & Preservation: Ideal for large-scale seafood processing plants and frozen food warehouses, it maintains a consistent -18~-40℃ environment to lock in freshness and extend shelf life by 30% compared to conventional cooling systems.

Pharmaceutical Cold Chain: Complies with GMP standards for storing temperature-sensitive drugs (e.g., vaccines, biological reagents), ensuring no fluctuations beyond ±0.5℃ to guarantee drug efficacy.

Industrial Low-Temp Processes: Supports chemical crystallization, plastic molding cooling, and metal heat treatment in low-temperature workshops, where precise -5~-25℃ cooling is critical for product quality.

Low-Temp Cast Iron Semi Hermetic Water Cooled Screw Chiller

Product Design & Material Advantages

Robust Structural Design

Compact Layout: Developed with CNC precision machining, the unit features a space-saving design (minimum dimension: 827×330×660mm for model 4YD-3.2) that reduces installation space by 20% compared to similar deep-low-temperature chillers.

Stable Operation: Equipped with a hardened crankshaft and low-friction bearing set, the compressor runs with vibration ≤55dB—quieter than industry averages—making it suitable for noise-sensitive environments like pharmaceutical labs.

High-Durability Materials

Compressor Body: Made of high-grade cast iron, it resists corrosion and thermal expansion even at -40℃, ensuring a service life of over 10 years.

Key Components: Chrome-plated piston rings enhance wear resistance; valve reeds use imported impact-resistant spring steel to improve refrigeration efficiency by 12%.

Technical Support & After-Sales Service

Pre-Installation Support: Our engineers conduct on-site surveys to confirm water supply pressure (required for water-cooled models) and installation space, providing customized layout plans.

Commissioning & Training: Free on-site commissioning includes refrigerant filling adjustment and operating parameter setting; we also train staff on daily monitoring (e.g., temperature, pressure).

Maintenance & Spare Parts: Annual maintenance reminders via email/SMS; global spare parts warehouses ensure delivery of critical components (e.g., PTC sensors, valve plates) within 5 business days.

Documentation: Access to the 2024 updated Semi-hermetic Screw Compressor Operation Manual via our official website, including troubleshooting flowcharts for common issues.

Water-Cooled Screw Chiller

Model	Condensing Temperature℃	Refrigerating Capacity Qo（W） Power Consumption Pe(kW)
			Evaporating Temperature ℃
			12.5	10	7.5	5	0	-5	-10	-15	-20	-25	-30
RFC4D-3.2	30	Qo	15960	14520	13190	11960	9760	7870	6260	4900	3740	2780	1970
		Pe	2.23	2.21	2.19	2.15	2.07	1.95	1.81	1.65	1.47	1.26	1.04
	40	Qo	14070	12790	11610	10510	8540	6860	5420	4190	3160	2290	1570
		Pe	2.64	2.60	2.55	2.49	2.36	2.20	2.02	1.81	1.58	1.33	1.05
	50	Qo	12250	11130	10090	9120	7390	5900	4630	3540	2630	1860	1220
		Pe	3.04	2.96	2.88	2.80	2.61	2.41	2.19	1.94	1.66	1.36	1.02
RFC4G-5.2	50	Qo	12200	11090	10060	9090	7370	5890	4620	3540	2630
		Pe	3.19	3.11	3.02	2.93	2.72	2.49	2.24	1.97	1.67
	60	Qo	10490	9530	8630	7800	6300	5010	3900	2960	2160
		Pe	3.59	3.49	3.37	3.25	3.00	2.72	2.42	2.09	1.74
	70	Qo	8800	7990	7230	6530	5260	4160	3210	2410	1720
		Pe	3.99	3.85	3.71	3.57	3.27	2.94	2.58	2.20	1.79
RFC4D-4.2	30	Qo	20700	18850	17120	15510	12660	10220	8160	6410	4960	3750	2760
		Pe	2.80	2.84	2.86	2.86	2.82	2.72	2.57	2.38	2.16	1.91	1.64
	40	Qo	18210	16550	15020	13600	11060	8900	7050	5490	4190	3100	2200
		Pe	3.48	3.47	3.44	3.39	3.25	3.06	2.83	2.55	2.25	1.92	1.58
	50	Qo	15740	14300	12960	11720	9500	7600	5970	4590	3420	2450	1640
		Pe	4.13	4.06	3.98	3.88	3.64	3.36	3.03	2.67	2.27	1.86	1.42
RFC4G-6.2	50	Qo	15710	14270	12940	11710	9490	7600	5970	4590	3430
		Pe	4.16	4.09	4.00	3.89	3.65	3.35	3.02	2.65	2.24
	60	Qo	13350	12120	10970	9900	7990	6340	4920	3710	2690
		Pe	4.81	4.68	4.53	4.37	4.01	3.61	3.17	2.70	2.21
	70	Qo	11030	10000	9030	8140	6520	5110	3910	2870	1990
		Pe	5.44	5.24	5.03	4.81	4.34	3.83	3.28	2.71	2.11
RFC4D-5.2	30	Qo	24600	22450	20400	18510	15140	12250	9790	7700	5930	4440	3210
		Pe	3.61	3.55	3.49	3.42	3.26	3.08	2.86	2.62	2.35	2.05	1.72
	40	Qo	21700	19750	17940	16270	13260	10690	8480	6610	5030	3700	2600
		Pe	4.30	4.21	4.12	4.02	3.79	3.53	3.23	2.91	2.56	2.17	1.75
	50	Qo	18880	17170	15580	14110	11460	9190	7240	5590	4190	3020	2050
		Pe	4.96	4.84	4.71	4.57	4.27	3.93	3.56	3.15	2.71	2.23	1.73
RFC4G-7.2	50	Qo	18800	17100	15520	14050	11430	9170	7230	5580	4190
		Pe	4.99	4.86	4.73	4.58	4.27	3.92	3.54	3.13	2.69
	60	Qo	16160	14680	13310	12030	9750	7770	6090	4650	3440
		Pe	5.62	5.46	5.28	5.10	4.70	4.28	3.82	3.33	2.80
	70	Qo	13580	12330	11170	10080	8140	6460	5020	3800	2770
		Pe	6.27	6.06	5.84	5.61	5.13	4.63	4.09	3.51	2.90
RFC4D-6.2	30	Qo	29550	26900	24450	22200	18170	14720	11770	9270	7170	5410	3950
		Pe	4.35	4.28	4.20	4.10	3.89	3.64	3.35	3.04	2.70	2.33	1.95
	40	Qo	26000	23650	21500	19490	15910	12830	10210	7980	6100	4520	3210
		Pe	5.25	5.13	5.00	4.85	4.54	4.18	3.80	3.38	2.94	2.48	2.00
	50	Qo	22550	20500	18630	16880	13740	11040	8730	6760	5100	3700	2540
		Pe	6.08	5.90	5.72	5.53	5.11	4.66	4.17	3.66	3.13	2.57	1.99
RFC4G-9.2	50	Qo	22550	20550	18640	16890	13750	11040	8730	6770	5100
		Pe	6.07	5.90	5.72	5.53	5.12	4.66	4.18	3.66	3.12
	60	Qo	19250	17500	15870	14360	11650	9320	7320	5620	4180
		Pe	6.86	6.63	6.39	6.14	5.62	5.07	4.49	3.89	3.25
	70	Qo	15970	14520	13160	11900	9620	7660	5980	4560	3350
		Pe	7.57	7.29	6.99	6.69	6.07	5.43	4.76	4.06	3.34
RFC4D-8.2	30	Qo	38400	35000	31800	28900	23600	19120	15280	12030	9280	6980	5080
		Pe	5.05	5.12	5.16	5.16	5.05	4.83	4.53	4.15	3.73	3.28	2.84
	40	Qo	33950	30900	28050	25400	20700	16670	13220	10290	7810	5730	3990
		Pe	6.63	6.52	6.39	6.24	5.87	5.43	4.93	4.40	3.83	3.26	2.69
	50	Qo	29350	26700	24200	21900	17730	14170	11110	8520	6320	4470	2930
		Pe	7.88	7.64	7.38	7.10	6.52	5.89	5.23	4.54	3.84	3.14	2.44
RFC4G-12.2	50	Qo	29100	26400	23900	21550	17390	13810	10750	8140	5940
		Pe	7.51	7.33	7.12	6.88	6.34	5.73	5.06	4.37	3.66
	60	Qo	24450	22150	19990	18000	14420	11340	8710	6460	4560
		Pe	8.49	8.18	7.86	7.51	6.79	6.02	5.21	4.40	3.58
	70	Qo	19850	17950	16170	14520	11540	8970	6760	4880	3290
		Pe	9.15	8.75	8.33	7.91	7.04	6.14	5.24	4.33	3.43
RFC4D-10.2	30	Qo	44850	40850	37150	33700	27550	22300	17790	13960	10730	8020	5760
		Pe	5.88	6.01	6.08	6.10	5.99	5.73	5.33	4.84	4.30	3.73	3.17
	40	Qo	39600	36000	32700	29650	24150	19410	15360	11920	9000	6540	4480
		Pe	7.63	7.56	7.45	7.29	6.89	6.38	5.77	5.11	4.41	3.70	3.01
	50	Qo	34200	31100	28200	25450	20600	16450	12870	9820	7230	5050	3220
		Pe	9.11	8.85	8.56	8.26	7.58	6.84	6.05	5.24	4.40	3.58	2.77
RFC4G-15.2	50	Qo	34700	31450	28450	25650	20650	16350	12680	9560	6930
		Pe	8.78	8.54	8.28	8.00	7.36	6.65	5.88	5.07	4.24
	60	Qo	29250	26500	23900	21500	17170	13450	10270	7550	5260
		Pe	9.80	9.44	9.06	8.67	7.83	6.94	6.01	5.05	4.07
	70	Qo	23850	21550	19380	17380	13770	10650	7960	5670	3720
		Pe	10.58	10.12	9.64	9.15	8.14	7.09	6.00	4.89	3.76
RFC4D-12.2	30	Qo	50900	46300	42100	38250	31300	25350	20250	15930	12290	9240	6700
		Pe	7.45	7.40	7.33	7.22	6.93	6.55	6.10	5.58	5.01	4.41	3.79
	40	Qo	45300	41200	37450	33950	27700	22300	17680	13760	10440	7650	5320
		Pe	9.16	8.97	8.75	8.50	7.95	7.33	6.65	5.92	5.17	4.39	3.61
	50	Qo	39550	35950	32600	29500	23900	19090	14980	11480	8510	6020	3930
		Pe	10.79	10.45	10.09	9.71	8.88	7.99	7.05	6.10	5.15	4.22	3.34
RFC4G-20.2	50	Qo	40250	36500	33000	29800	23950	18970	14690	11040	7940
		Pe	10.42	10.11	9.77	9.41	8.63	7.77	6.85	5.88	4.89
	60	Qo	33900	30650	27650	24850	19850	15530	11830	8690	6020
		Pe	11.65	11.20	10.72	10.22	9.18	8.10	6.98	5.84	4.70
	70	Qo	27500	24850	22350	20000	15840	12240	9150	6520	4300
		Pe	12.59	12.01	11.42	10.82	9.57	8.30	7.02	5.75	4.52
RFC4D-15.2	30	Qo	69100	62800	57000	51600	49150	33700	26700	20850	15920	11840	8500
		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
		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
		Pe	14.24	13.54	12.87	12.22	10.99	9.81	8.69	7.59	6.51	5.43	4.34
RFC4G-25.2	50	Qo	54100	49050	44400	40100	32400	25800	20250	15570	11660
		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
		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
		Pe	16.09	15.21	14.36	13.53	11.96	10.48	9.07	7.74	6.45
RFC4D-20.2	30	Qo	78500	71400	64800	58600	47700	38350	30450	23800	18190	13560	9770
		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
		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
		Pe	16.67	15.93	15.20	14.48	13.06	11.67	10.31	8.97	7.66	6.37	5.10
RFC4G-30.2	50	Qo	61500	55800	50500	45650	36950	29500	23200	17870	13430
		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
		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
		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.

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
4VD-15.2	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
4VG-25.2	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
4VD-20.2	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
4VG-30.2	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.

Q: The equipment fails to start. What might be the causes and how to address them?

A: Possible causes include power-off/low voltage or poor connection of the control system. For power issues, check the power supply; for control system issues, inspect the control wiring and repair it.

Q: When the equipment fails to operate due to abnormal voltage during startup, what two scenarios need to be distinguished for separate handling?

A: Two scenarios should be distinguished. If the voltage is low on the power supply side, contact the power company for handling; if there is poor wire contact, directly repair the contact points.

Q: After checking the power supply and control wiring, the equipment still fails to start. What additional confirmation is needed?

A: It is necessary to additionally confirm whether there are hidden issues with the control system connection, such as oxidation of wire joints or loose connectors. After confirmation, reconnect or repair them.

Product Description

Technical Specifications

FAQ