Superfluid Helium Valve

Dilution Refrigerators & mK Cryostats by Zero Point Cryogenics (CA)

Overview

The Superfluid Helium Valve is designed to be housed on the lowest temperature stage of your cryostat to isolate your superfluid helium experiment from the fill line. This helps in stabilizing a constant pressure and preventing pressure noise in superfluid experiments. Naturally, this valve is not restricted to superfluid helium but will work with any fluid at any temperature between 0 and 300 K. Actuation pressure: tunable. Nominal operation at 5-10 bar Operation temperature: 1 mK to 300+ K Dimensions: 38 mm diameter, 16.6 mm height Mounting: gold-plated Cu adapter disk, customized for your cryostat Inlet & outlet tubing: 1 mm OD / 0.5 mm ID, fully welded connections Compatible with 0.5 mm OD tubing solder connections Closed-state superfluid leak rate: Guaranteed: better than 1×10-9 mbar⋅L/s at 1.5 K Expected: below 1.3×10-10 mbar⋅L/s at 1.5 K Open-state flow rate: Better than 1.0 mbar⋅L/s, at 1.4 bar inlet pressure, 1.5 K

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