Iwatani connectors Iwatani connectors Pictures of the connectors between the rotary valve, high-pressure tube and cold head. These were made after a degraded cooling performance was noted.
Some clear substance is noted covering the valves.
End of the thin flexible tube. The inner O-ring is shiny from a coating of oil. The plate in the center is also covered, and the bright part at the bottom is due to a droplet of oil. End of the thick flexible tube. It has only been used once, and the coating is noticeably thinner - but it is still there.