Serpent Arms Portable PCP Air Compressor | GX CS4 5800 psi

Product Description

Serpent Arms Portable PCP Air Compressor |

GX CS4 5800 psi

This CS4 PCP compressor has a new upgraded 350W motor , and adopts four-stage compression technology. It is very stable when working, and it is very quiet with only 70db. Maximum filling 5800Psi/40Mpa. At the same time, it is equipped with a double-pointer pressure gauge, and the two-level setting auto-stop pressure, which is more secure.

A water tank and a grease tank are designed on the top of the compressor. The excellent cooling can achieve 5 hours of continuous work and can fill a maximum 6.8L gas cylinder. Note: For the first use, it must be filled with 500ml of neutral distilled water ( can not contain impurities such as minerals )or antifreeze ( PH is about 7). Do not turn the grease knob until after 4-6 hours of use, then turn it one turn. Afterwards,if the speed has slowed down and twisted again. After the break-in period, there is no need to add grease.

15% Faster Filling Speed: Filling 0.5L tank from 3000Psi to 4500psi ,only needs 4-5 minutes. Filling 0.5L from 0-4500psi, only needs 14-16 minutes. Filling 6.8 liter bottle from 0-4500psi ,2 hours and 40 minutes.

12V DC input, you can use car battery or household outlet for power supply, equipped with 110V-12V converter. The machine is equipped with a built-in oil-water separator which never needs to be replaced, so you don't need to buy other external oil-water separators.

Please read user manual carefully before turning on compressor. All GX pump come with 12 months warranty service and life time technology support. Product size: 11.8*6.1*12.4 inch , weight: 29lb. ATTENTION: when filling is complete, please release the bottle valve first (when filling bottle) and then open compressor's bleed valve to release line pressure . All pressure must be released from compressor before starting.

Note: Be sure to add antifreeze if it freezes in your area. 

 

PACKAGE INCLUDES:

pcp air compressor *1, Instruction manual *1, Fitting kit *1, 110v-12V Power Supply*1

SPECIFICATIONS:

ower: 350W

Voltage: 110V/220V AC voltage or 12V car battery

Motor speed: 2700r/min

Air output: 11 l/min

Weight: 33lbs

Noise level: 70 decibels

Cooling system: water cooling system + fan cooling

Automatic stop

Moisture filter: built-in

Maximum working pressure: 400bars/5800psi

Continuous working time: 4 to 5 hours

Maximum cylinder capacity: 6.8L

Users in the airgun community on platforms like Airgun Nation and Reddit have documented filling 9L tanks with the GX CS4 (Serpent Arms). While these are unofficial reports, they provide specific performance data:

Reported 9L Filling Performance

Complete Fill (0 to 4500 PSI): One user reported successfully filling a 9L Acecare tank in approximately 3 hours and 29 minutes.

Top-Off (200 bar to 300 bar): For a 9L SCBA tank, top-off times are reported to be around 30–40 minutes.

Estimated Continuous Time: Based on the factory output rate of 11 liters per minute, a full fill for a 9L (60-minute) tank is mathematically estimated at roughly 4 hours.

User Tips for Filling Large Tanks

To preserve the life of the compressor when exceeding the official 6.8L limit, experienced users suggest the following:

Session Filling: Break long fills into multiple sessions (e.g., 45-minute intervals) to manage heat, even though the unit is rated for 5 hours of continuous work.

Moisture Management: Users recommend cracking the bleed screw every 15 minutes during long fills to purge moisture, especially in humid environments.

Secondary Filtration: Many users add an inline moisture/oil separator (like the GX Filter) as a backup to the built-in system when filling high-volume tanks.

Input Boosting: Some advanced users have "boosted" performance by providing 2–10 PSI of regulated shop air to the compressor's intake, which one source claimed increased output to nearly 13 liters per minute.