ECCN
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2B233
2B233 Bellows-sealed scroll-type compressors and bellows-sealed scroll-type vacuum pumps having all of the characteristics described in this ECCN (see List of Items Controlled).
- Category
- Category 2—Materials Processing
- Product group
- B. “Test”, “Inspection” and “Production Equipment”
Reason for Control
- NP
- AT
Official text
License Requirements
Reason for Control:
NP, AT
Control(s) Country chart (see Supp. No. 1 to part 738)
- NP applies to entire entry NP Column 1
- AT applies to entire entry AT Column 1
List Based License Exceptions (See Part 740 for a description of all license exceptions)
LVS: N/A
GBS: N/A
List of Items Controlled
Related Controls: (1) See ECCNs 2E001 (“development”), 2E002 (“production”), and 2E201 (“use”) for “technology” for items controlled under this entry. (2) Also see vacuum pumps controlled under ECCN 2B231. (3) Vacuum pumps “specially designed” or prepared for the separation of uranium isotopes are subject to the export licensing authority of the Nuclear Regulatory Commission (see 10 CFR part 110).
Related Definitions: N/A
Items: a. Capable of an inlet volume flow rate of 50 m 3/h or greater;
b. Capable of a pressure ratio of 2:1 or greater; and
c. Having all surfaces that come in contact with the process gas made from any of the following:
c.1. Aluminum or aluminum alloy;
c.2. Aluminum oxide;
c.3. Stainless steel;
c.4. Nickel or nickel alloy;
c.5. Phosphor bronze; or
c.6. Fluoropolymers.
Technical Notes:
1. In a scroll compressor or vacuum pump, crescent-shaped pockets of gas are trapped between one or more pairs of intermeshed spiral vanes, or scrolls, one of which moves while the other remains stationary.
The moving scroll orbits the stationary scroll; it does not rotate. As the moving scroll orbits the stationary scroll, the gas pockets diminish in size (i.e., they are compressed) as they move toward the outlet port of the machine.
2. In a bellows-sealed scroll compressor or vacuum pump, the process gas is totally isolated from the lubricated parts of the pump and from the external atmosphere by a metal bellows. One end of the bellows is attached to the moving scroll and the other end is attached to the stationary housing of the pump.
3. Fluoropolymers include, but are not limited to, the following materials:
a. Polytetrafluoroethylene (PTFE);
b. Fluorinated Ethylene Propylene (FEP);
c. Perfluoroalkoxy (PFA);
d. Polychlorotrifluoroethylene (PCTFE); and
e. Vinylidene fluoride-hexafluoropropylene copolymer.
ecfr-15cfr774-supp1-2026-08-28 · effective 2026-08-28
Issue date 2026-08-28. Amendment date 2026-08-28.
- eCFR Commerce Control List (15 CFR 774, Supplement No. 1)www.ecfr.gov
- eCFR versioner XML captured at ingestwww.ecfr.gov
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