Non Evaporable Getter (NEG) Pumps

	Features and Applications
	NEG pump is a kind of chemisorption pump, which assembled after the NEG alloy heated by high sintering, It could eliminates large amounts of residual gases in a vacuum environment, mainly applied for UHV testing or Lab equipment. When it’s activated NEG pumps could operating without power, also free of Vibration and Nonmagnetic. The highlight of the NEG pumps it's extremely effective for Hydrogen and other active gases, and would never reduce under the UHV.
	Basic Characteristics and General Data
	Type Length(mm) Outside Diameter (mm) Gross Weight(g) Ordinary Temperature Resistance(Ω) NP-172-40-S/I/16 133±20 25±3 140±15 0.28±0.05 NP-172-60-S/I/35 133±20 25/36±3 170±20 0.28±0.05 NP-175-80-S/I/35 133±20 25/36±3 170±20 0.28±0.05 NP-172-120-S/I/35 133±20 25/36±3 170±20 0.28±0.05 NP-172-720-S/I/100 145±20 80/95±3 980±50 2.1±0.15 NP-T-400-C/0/150 58±5 145±15 480±30 /
	Type Gettering Rate(H2) Total Sorption Capacity(H2) Gettering Rate (CO) Total Sorption Capacity (CO) L/S Torr·L L/S Torr·L NP-172-40-S/I/16 100 600 50 300 NP-172-60-S/I/35 200 1000 100 500 NP-175-80-S/I/35 200 1000 100 500 NP-172-120-S/I/35 400 2000 210 1000 NP-172-720-S/I/100 2400 12000 1260 6000 NP-T-400-C/0/150 / / / /
	Suggested Activation Conditions
	It is recommended that the user use a constant current power supply to energize and activate the NEG Pump. Recommended activation conditions: Energizing activation at 500°C for 45min, the vacuum degree of the system in the whole process of activation should be better than 0.01Pa. Proper extension of the time will facilitate full activation of the NEG Pump. If the standard activation temperature cannot be reached, the activation time must be extended to compensate. It is necessary to ensure the vacuum degree of the vacuum chamber of the activation process, If the vacuum is too low, there will be hot wire corrosion, heater sputtering, suction material pollution, abnormal activation temperature and other adverse conditions. The NEG Pump releases a certain amount of gas during activation, in order to ensure the vacuum degree during the activation of the NEG Pump. We recommend that the NEG Pump should be activated under dynamic vacuum, and the activation process should be slowly and gradually increased from 1.5A until the predetermined current value is reached, the rapid deflation and the change of electrical parameters caused by the rapid change of the temperature of the NEG Pump must be avoided.
	Type Recommended Activation Current (A) Recommended Activation Power (W) NP-172-40-S/I/16 4 40 NP-172-60-S/I/35 4 35 NP-175-80-S/I/35 5.2 60 NP-172-120-S/I/35 5.2 60 NP-172-720-S/I/100 5 300 NP-T-400-C/0/150 / /
	Caution
	●When activated and working, the NEG Pump casing and flange have a high temperature, pay attention to prevent burns. ●When the NEG Pump is at high temperature, it must be in vacuum conditions to avoid failures due to contamination and consumption. ●When connecting the power supply, ensure that the connection between the power supply and the flange electrode is firm, and pay attention to the insulation with other parts. ●Before heating activation, pay attention to ensure that the system is under vacuum conditions that meet the requirements. ●Under special circumstances, in order to make the NEG Pump have a high pumping speed for C, N, O and other gases, the working temperature can be maintained in the range of 200 °C ~ 250 °C (energized 3A), at which time the ultimate vacuum degree that the NEG Pump can achieve is reduced.