Products

4 Kelvin Closed Cycle Refrigerator Systems from Janis and SHI

Sumitomo (SHI) 4 K Refrigerator - RDK-305D (0.4 Watt @ 4.2 K)

Overview

These systems provide 0.4 Watts of cooling at a temperature of 4.2 K at the second stage and can reach a minimum temperature below 3.5 K (with no parasitic or experimental heat loads). The
0.4-Watt systems employ a smaller compressor and cold head than the 1-Watt systems. The compressor is available in an air-cooled version only, in conjunction with 10-meter long flexible gas lines.

Standard Configuration

These systems provide 0.4 Watts of cooling at a temperature of 4.2 K at the second stage and can reach a minimum temperature below 3.5 K (with no parasitic or experimental heat loads). The 0.4-Watt systems employ a smaller compressor and cold head than the 1-Watt systems. The compressor is available in an air-cooled version only, in conjunction with 10-meter long flexible gas lines. (Please see our Compressor page for more information.)

Click button to enlarge view of mechanical drawing for RDK-305D closed cycle refrigerator coldhead from Sumitomo (SHI), available for incorporation into Janis Research cryocooler systemsEnlarge

RDK-305D Mechanical Drawing

Click button to enlarge view of mechanical drawing views A-A, B-B and C-C of RDK-305D cold headEnlarge

RDK-305D Mechanical Drawing - Views A-A, B-B and C-C

Click on button to enlarge view of RDK-305D cryocooler typical loadmaps (50 Hz and 60 Hz), Sumitomo, SHI, Janis ResearchEnlarge

RDK-305D Typical Load Map (50 & 60 Hz)

Characteristics:

  • Refrigeration Capacity 0.4 W @ 4.2 K
  • Orientation Independent
  • Push-button Operation

Click here to contact Janis today!

Specifications

COLD HEAD MODEL RDK-305D

Refrigeration Cycle Modified Gifford-McMahon
Refrigeration Capacity
(Vertical Position)
50 Hz 1st stage: 15 W @ 40 K
2nd stage: 0.4 W @ 4.2 K
60 Hz 1st stage: 20 W @ 40 K
2nd stage: 0.4 W @ 4.2 K
Orientation Any - Capacity Loss: Max 15/25% (2nd/1st)
Weight Approximately 16 kg
Dimension Approximately 180D x 294L x 512H (mm)
Maintenance Interval 10,000 Hours
Flexline Length 10m
Flexline Weight 7 kg per line
Compatible Compressor Unit Model CNA-31C, CNA-31D

Specifications subject to change without notice.

Janis

Cryogenic Research Equipment More>

Complete product list: