Cryocoolers

Pulse tube and Gifford-McMahon

H-gate dilution frames use two-stage pulse tubes. The comparison on the dilution page lists the standard tube and the alternates for each frame. Gifford-McMahon coolers cover the warmer 20–80 K range when a full dilution stage is not required.

Two-stage pulse tubes

Models referenced on H-gate frames:

PT410
PT415
PT415-ENH
PT420
PT425
PT425-ENH
PT310
PT310-ENH

Gifford-McMahon

Warmer closed-cycle coolers, separate from the dilution loop.

20–30 K class
80 K class

Model list and capacities