4K Cryocoolers

SHI’s 4K Gifford-McMahon Cryocoolers are recognized as the most reliable and versatile systems available in the marketplace.  They feature high cooling capacities, compact designs and are orientation-free.  Models like the RDK-408D2 are the standard for MRI and other superconducting magnets.  These 4K Cryocoolers can be found cooling a wide variety of analytical and experimental devices, and offer a very cost effective alternative to open-cycle liquid helium systems.

Specifications
Cold Head Model RDK-101D RDK-305D RDK-205D RDK-408D2 RDE-412D4 RDK-415D
1st Stage Capacity 50 Hz 3.0 W @ 60 K 15 W @ 40 K 3.0 W @ 50 K 40 W @ 43 K 53 W @ 43 K 35 W @ 50 K
60 Hz 5.0 W @ 60 K 20 W @ 40 K 4.0 W @ 50 K 50 W @ 43 K 60 W @ 43 K 45 W @ 50 K
2nd Stage Capacity 50 Hz 0.1 W @ 4.2 K1 0.4 W @ 4.2 K 0.5 W @ 4.2 K 1.0 W @ 4.2 K 1.25 W @ 4.2 K 1.5 W @ 4.2 K
60 Hz 0.1 W @ 4.2 K1 0.4 W @ 4.2 K 0.5 W @ 4.2 K 1.0 W @ 4.2 K 1.25 W @ 4.2 K 1.5 W @ 4.2 K
Minimum Temperature2 <3.0 K <3.5 K <3.5 K <3.5 K <3.5 K <3.5 K
Cooldown Time2 50 Hz <150 <120 <90 <60 <60 <60
60 Hz <150 <120 <90 <60 <60 <60
Weight 7.2 kg
(15.9 lbs.)3
16.0 kg
(35.3 lbs.)
14.0 kg
(30.9 lbs.)
18.0 kg
(39.7 lbs.)
20.0 kg
(44.1 lbs.)
18.5 kg
(40.8 lbs.)

Specifications subject to change without notice.

Note: “RDK” prefix denotes individual cryocoolers, while “SRDK” prefix denotes a complete system. For example, SRDK-415D-A71A is the complete model number for an RDK-415D Cold Head with a CSA-71A Compressor.

With HC-4E2 and Zephyr Compressors, 2nd stage capacity is 0.16/0.2 W @ 4.2 K (50/60 Hz).  1st stage capacity is 3.0/5.0 W @ 45 K (50/60 Hz).
2 For reference only. Refer to individual performance specifications.
3 Cold head weight only. Refer to individual performance specifications for weights of additional parts.

Options
Compressor Options
  RDK-101D RDK-305D RDK-205D RDK-408D2 RDE-412D4 RDK-415D
HC-4E          
CKW-21A          
HC-8E            
F-40   1    
F-50      
F-70        
CNA-11          
Zephyr®          
FA-40   •     
CSA-71      
FA-70        

1 Reduced capacities when operated with F-40 or FA-40 Compressors.

Service and Support

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