CSH660A-20
Mobile screw air compressor · 18 m³/min · 20 bar
Full Specifications
| Compressor | Standard Operating Conditions |
|---|---|
| Volumetric Flow Rate [m³/min] | 18 |
| Volumetric Flow Rate [cfm] | 660 |
| Discharge Pressure [bar] | 20 |
| Discharge Pressure [psi] | 290 |
| Lubricant Capacity [L] | 45 |
| Nose Section | LGIR |
| Engine | Manufacturer |
| Power [kW] | 191 |
| Maximum Operating Speed / Idle Speed [rpm] | 1900/1400 |
| Number of cylinders | 6 |
| Total Displacement [L] | 7.255 |
| Emission Standards | National III (Emission Standard) |
| Fuel Tank Capacity [L] | 340 |
| Complete Machine | Total Machine Weight [t] |
| Exhaust Port Specifications x Quantity | G1½×1 & G¾×1 |
| Overall Machine Structure | Four Rounds |
| Overall Dimensions [mm] | 3770x1600x2340 |
| Noise [dB(A)] | 82±3 |
Specifications describe the standard configuration and are subject to change with the air package, tooling and options you select. Confirm the final datasheet with us before placing an order.
About the mobile air compressors range
In a down-the-hole operation the compressor is not an accessory — it sets the achievable penetration rate. A hammer starved of air at the correct pressure simply strikes slower. This range covers diesel-powered mobile screw compressors in single and two-stage configurations, sized by free air delivery and working pressure against the hammer and the hole diameter they have to support.
Where the CSH660A-20 fits
CSH660A-20 is one of the mobile air compressors configurations we build, specified at working pressure 20, power Manufacturer. Mobile screw air compressor · 18 m³/min · 20 bar.
Typical applications
- DTH drilling rigs — Primary air supply for surface and water well rigs, matched to hammer air consumption.
- Quarry and mine support — Air for rigs, hand-held tools and cleaning on site.
- Foundation and anchoring work — Air for anchoring rigs and for hole cleaning.
- Pipeline and utility work — Trenchless and utility installation requiring mobile air.
- Sandblasting and general site air — High-volume air where the compressor also has to be mobile.
How it works
A screw compressor traps air between two rotating rotors and squeezes it continuously, which is why it delivers a steady flow rather than the pulsed output of a piston machine. Single-stage units cover the common pressure band; two-stage units reach higher pressure at better efficiency, which matters for deep holes and large hammers where the pressure has to be held at the hammer.
- Free air delivery and working pressure must both be met — a compressor rated for flow at low pressure may not hold pressure at the hammer.
- Two-stage machines are worth the extra cost where the hammer needs high pressure at depth.
- Engine emission standard decides where the machine can legally operate, so it is a selection criterion, not a detail.
How to specify the right configuration
Add up the hammer air consumption, add a margin for leakage and altitude, and check the pressure the hammer needs at the hammer. Then choose the compressor that delivers both simultaneously.
- Do not select on free air delivery alone: check the pressure at which that flow is delivered.
- Allow for hose length and couplings — pressure at the compressor outlet is always higher than at the hammer.
- At altitude, derate the free air delivery; the specification figures are normally at sea level.
- Check the emission standard against local site regulations before ordering.
Frequently Asked Questions
Single-stage or two-stage?
Two-stage compressors reach higher pressure more efficiently, which pays off on deep holes and large hammers. Single-stage units are the economical choice for standard pressure and moderate depth.
How much air does my hammer need?
Each hammer model lists its air consumption at its working pressure. Add a margin for hose losses and altitude, then choose a compressor that delivers that flow at that pressure.
Can the compressor run the rig and hand tools at once?
Only if the free air delivery covers both loads. In practice most operators size for the hammer and add a separate small machine for tools.
Is an aftercooler or water separator needed?
For DTH work, dry air matters: moisture in the air can reduce hammer performance and promote corrosion. Specify the air treatment you need at enquiry.
What is the price of the CSH660A-20?
Price depends on configuration — the air package, the tooling included, and the shipping terms. Send us the hole diameter, depth and ground conditions and we will quote against your job rather than a list price.
Tell Us About Your Site
Send us your geology, hole diameter and target depth.