Liquid Helium Valve Model C3081-M21

Features

• Low Handle Torque for Bubble Tight Shutoff
• Redundant Stem Seal
• Cryogenic Stem Packing
• Brass Bonnet
• Redundant Cryogenic Bonnet Seal
• Bonnet Purge Port (Thermal Relief Location)
• Stainless Steel Body and Stem
• Full Jacket (Cold Box Cuff Available)
• MLI on Jacketed Valves
• Low Thermal Conductivity Stem and Support Tube
• Brass Plug
• Plug To Stem Stabilizer
• KEL-F Seat Seal w/ Locked Thread Insert
• Contoured Flow Plug Available

Technical Data

• 300 PSIG MAWP
• 450 PSIG Proof
• Seat Seal Bubble Tight @ 150 PSIG
• Packing Mass Spec Tested @ 1x10 ^-5 TORR
• Leak Rate Below 1x10 ^-8 CC GHe/SEC
• Heat Leak: 6.25 BTU/HR (1.8 WATTS)
• Cooldown Mass: 3.25 Pounds
• Options:
  • Bonnet Purge Port
  • Full Lower Jacket
  • Pneumatic Actuator
  • Flow Plugs

Applications

• Vacuum Jacketed Piping
• Cold Boxes
• Helium Transfer Lines
• Helium Liquefiers