GX Pump GX E-5K1
Specifications
- Max pressure
- 5,800 psi (400 bar)
- Cooling
- air cooling + water cooling
- Moisture handling
- condensing oil and water separator
- Auto-stop
- Yes
- Duty cycle
- up to 480 minutes (8 hours) continuous per manufacturer spec sheet
- Noise
- 65-70 dB
- Weight
- 77 lb
- Vessel guidance
- Tops off large tanks (9L, 3L reported by owners) as well as guns directly; not certified for scuba use
- Also sold as
- GX 5K1, GX-E-5K1
Estimated fill times
| Vessel | 0 → 250 bar | 200 → 300 bar |
|---|---|---|
| gun cylinder 0.3L | 4.2 min | 1.7 min |
| 1L bottle | 14.2 min | 5.7 min |
| 2L bottle | 28.3 min | 11.3 min |
| 3L bottle | 42.5 min | 17 min |
| 6.8L (74ci) tank | 96.3 min | 38.5 min |
| 9L (97ci) tank | 127.5 min | 51 min |
All values estimated from stated manufacturer or reviewer benchmarks (3 benchmarks); treat as run-time, not wall-time, past the unit's duty-cycle guidance.
Where to buy
Prices captured 2026-07-06; follow the link for current pricing and stock.
About GX Pump
GX Pump has spent two decades building portable PCP compressors, and it shows in the details that matter: patented compression structures, roller bearings at the wrist pin, and a model range that runs from the entry CS1 up to the water-cooled CS4 with its five-hour continuous duty rating. The -I variants build the 110V converter into the body so one unit covers home outlets and car batteries alike. GX also backs its machines with a genuinely useful parts store, offering filters, seals, fans, and rebuild components that keep these compressors serviceable for years.
Own one?
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Open my locker →Specifications come from manufacturer pages and named retailer listings; blanks mean a value wasn't published, not that it's zero. Fill-time figures are derived estimates, not lab measurements. Always follow the manufacturer's fill and duty-cycle guidance.