MJ14LN600 600 ml PTFE Milling Jar with Liquid Nitrogen Cooling Jacket and Vacuum Insulation for Cryogenic Grinding
The MJ14LN600 milling jar is engineered to enable grinding of materials that are too flexible or sensitive to be processed at ambient temperatures. This specialized jar facilitates milling under cryogenic conditions near liquid nitrogen temperatures, preventing contamination from iron and preserving material integrity during grinding. It is ideal for laboratories requiring precise low-temperature milling to maintain sample properties.
This milling jar features a 600 mL PTFE inner tank surrounded by a liquid nitrogen cooling jacket and an outer vacuum insulation layer. The cooling jacket, capable of holding 1.5 liters of liquid nitrogen, maintains the inner jar at extremely low temperatures. The vacuum insulation minimizes heat transfer and thermal radiation, ensuring stable cryogenic conditions during milling. The jar is mounted on two 185 mm diameter wheels for rotation and is compatible with conventional rolling mills having an open spacing of 150 to 185 mm between rollers.
Key Features
- 600 mL PTFE inner jar dimensions: outer diameter 92 mm, inner diameter 79 mm, length 127 mm
- Liquid nitrogen cooling jacket with 1.5 L capacity for sustained cryogenic operation
- Vacuum insulation layer reduces thermal radiation and heat loss
- Over-pressure safety relief valve activates at >3.7 atm (55 PSI) to ensure safe operation
- Includes one set of yttria-stabilized zirconia (YSZ) milling balls for immediate use
- Compatible with rolling mills having 150–185 mm open spacing between rollers
- Built-in T-type thermocouple for temperature monitoring (monitor not included)
Technical Specifications
| Parameter | Specification |
|---|---|
| Inner Jar Material | PTFE |
| Inner Jar Capacity | 600 mL (638 mL actual volume) |
| Inner Jar Dimensions (O.D x I.D x Length) | 92 mm x 79 mm x 127 mm |
| Cooling Jacket Capacity | 1.5 liters liquid nitrogen |
| Operating Temperature Range | Below -130°C without heating; down to -150°C max with optional mini heating gun |
| Safety Valve Activation Pressure | >3.7 atm (55 PSI) |
| Jar Rotation Wheels Diameter | 185 mm |
| Net Weight | 30.2 lb (13.7 kg) |
Typical Applications
This milling jar is suited for cryogenic grinding of temperature-sensitive or flexible materials in research and development laboratories. It is particularly useful for materials that degrade or deform at room temperature, such as polymers, biological samples, or certain composites requiring contamination-free milling.
Configuration & Operating Notes
- The jar includes one set of yttria-stabilized zirconia (YSZ) milling balls for immediate operation.
- Temperature monitoring requires an external temperature monitor (not included).
- Optional accessories include a vacuum pump to reduce internal tank pressure and minimize heat loss, a dual mini heating gun to prevent freezing during rotation, and a rolling mill with 150–185 mm roller spacing if not already available.
- Automatic liquid nitrogen delivery systems with temperature control and solenoid valves are available as optional upgrades.
- Pre-cooling the tank and periodic addition of liquid nitrogen during operation are necessary to maintain target temperatures.
- Operating environment humidity should be below 48% to avoid freezing issues during rotation.
- Strict safety precautions must be followed when handling liquid nitrogen, including wearing gloves and safety goggles.
Safety Warning
- Always wear protective gloves and safety goggles when filling liquid nitrogen into the cooling jacket.
- Users inexperienced with liquid nitrogen handling should consult safety notes and seek guidance before operation.
- The manufacturer is not responsible for damages or losses resulting from improper use or neglect of safety protocols.
