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Liquid Nitrogen Foreline Traps 4” Body Inline / Right Angle

Key High's LNT Series traps condenses gas vapors and should be the first choice for removing water vapor. LNT Series (liquid nitrogen traps) offer the most effective method for trapping condensable vapors before they can contaminate the oil of the backing pump or damage the pump itself. LNT Series traps also prevent backstreaming.
  • 304 Stainless Steel Construction
  • Viton® Bonnet
  • Removable Dewar
  • Dewar Capacity .64 liters LN2
  • Approximate Liquid Nitrogen Dewar hold time 6 hours (dependent on conditions)

The nitrogen dewar acts as a pump, lowering the system's base pressure. Liquid nitrogen has a temperature of -321°F. Filling the dewar will achieve an operating temperature of -300°F (approximately).  The band clamp design of the housing allows easy removal of the liquid nitrogen dewar without removing the trap itself from the foreline.

Isolation valves should always be used between any capture-type trap and the chamber. Close the Isolation valve for the duration of the regen cycle. This will prevent warming gases from migrating back into the chamber. The benefits of Key High's LNT Series traps are cleaner chambers, lower base pressures, and extended pump life cycle. This will prevent warming gases from migrating back into the chamber. The benefits of Key High's LNT Series traps are cleaner chambers, lower base pressures, and extended pump life.

 

 

LNT SERIES 4" Inline LN2 Refrigerant Traps

LNT SERIES 4" Inline LN2 Refrigerant Traps

LNT SERIES 4" Inline LN2 Refrigerant Traps

 
PART NUMBER PORT STYLE
LNT-4-75 3/4” OD tube
LNT-4-75-K NW 16
LNT-4-75-CF 1-1/3" OD MET-SEAL
LNT-4-100 1" OD tube
LNT-4-100-K NW 25
LNT-4-100-CF 2-3/4" OD MET-SEAL
LNT-4-150 1-1/2" OD tube
LNT-4-150-K NW 40
LNT-4-150-CF 2-3/4" OD MET-SEAL

 

 

4" Right Angle LN2 Refrigerant Traps

4" Right Angle LN2 Refrigerant Traps

4" Right Angle LN2 Refrigerant Traps

 
PART NUMBER PORT STYLE X
LNTA-4-75 3/4” OD tube 5.50
LNTA-4-75-K NW 16 5.50
LNTA-4-75-CF 1-1/3" OD MET-SEAL 5.50
LNTA-4-100 1" OD tube 5.40
LNTA-4-100-K NW 25 5.40
LNTA-4-100-CF 2-3/4" OD MET-SEAL 5.40
LNTA-4-150 1-1/2" OD tube 5.40
LNTA-4-150-K NW 40 5.40
LNTA-4-150-CF 2-3/4" OD MET-SEAL 5.40

Product information is subject to change without notice. Product images may include options or accessories not included with the base model.

Precision Welded. Performance Proven.
For 50 years, Key High Vacuum Products, Inc. has been a trusted leader in precision-engineered stainless steel high vacuum weldments. With tens of thousands of unique weldments in use—from particle accelerators to industrial leak detectors—our expertise is proven across industries. Rooted in innovation, craftsmanship, and an unwavering commitment to customer satisfaction, we deliver high-quality, customized solutions that drive success. Every day, our team brings a unique blend of passion and precision, ensuring your goals are met with excellence—because your mission matters. Experience the Key High difference.
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Key High Vacuum Products, Inc.
36 Southern Boulevard, Nesconset, NY 11767
1-631-360-3970
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