Keepfull Vent Device
Get an uninterrupted, instantaneous supply of liquid with a CRANE Cryogenics Keepfull Vent Device. Properly designed systems will incorporate Keepfulls at all system highpoints. Our Keepfull Vent Device has an internal mechanical float that drops to allow accumulated gas to vent. Once all of the gas vents, the float rises to seal off the vent orifice. This simple design requires no field adjustments, no sensors, no pneumatics, and no electronics.
Key Features And Benefits
- Provides Liquid on Demand Performance.
- Available in End-of-Line, Inline, and Vertical configurations.
- Gas venting is controlled while retaining liquid nitrogen.
- Vent Check Valve prevents moisture from back-streaming through the vent.
- Available for all sizes of vacuum-jacketed pipe offered by CRANE® Cryogenics.
Technical details
| Pressure: | Up to 150 PSI |
| Temp: | Down to -320°F |
| Materials: | 300 Series Stainless Steel |
| Vacuum Options: | Static Vacuum Design, Dynamic Vacuum Design |
| Custom Options: | Dual Floats, Custom Configurations |
Applications
Available For:
- Liquid Nitrogen
- Carbon Dioxide
- Liquid Argon
- Liquid Hydrogen
- Liquid Oxygen
- Liquid Helium
Industry Applications:
- Space Launch
- Semiconductor Manufacturing & Testing
- Pharmaceutical
- Biological Storage & Research
- Food and Beverage
- Electronics Manufacturing & Testing Applications
- Metal Tempering
- Rubber Deflashing
Literature
CRANECRYOGENICS™- KEEPFULL VENT DEVICE
Certificates
ASME Code Compliant
Testing and Certification
Models 3D

We Know Cryo®
Innovating For Tomorrow
Crane Cryogenics brings together the trusted capabilities of Crane®, CryoWorks®, and Technifab® brands — forming a leading force in cryogenic engineering, manufacturing, and service
excellence. With decades of experience across hydrogen, LNG, nitrogen, oxygen, and other cryogenicfluids, we deliver end-to-end solutions for the most demanding industries including space exploration,semiconductors, chemical process, food, cryo-therapy, and pharma, among others – and we are Keeping Cryogenics Cool™
Crane Cryogenics operates within Crane Company’s ChemPharma & Energy business.