📦 Drilling Air Compressors
Kaishan LGCY-19/21-21/18K Portable Diesel Screw Compressor
Model: LGCY-19/21-21/18K
The Kaishan LGCY-19/21-21/18K portable diesel screw air compressor is a heavy-duty two-stage mobile compressor engineered for drilling, mining, and construction work. Its model designation indicates dual pressure capability of 21 bar and 18 bar, with free air delivery around 19 m³/min, making it suitable for DTH hammer drilling and high-pressure site operations. Powered by a reliable diesel engine and built on a rugged four-wheel chassis, it delivers stable compressed air in remote locations without external power. The unit combines Kaishan's proven screw airend, efficient cooling system, and intelligent control panel to reduce fuel consumption and downtime. Whether you are running blast hole drilling, water well projects, or pipeline testing, the LGCY-19/21-21/18K offers the pressure and flow needed for demanding jobs. It is easy to tow, simple to maintain, and supported by Kaishan's global service network, making it a practical choice for contractors who need dependable mobile air power.
Best For
Technical Specifications
| Model | LGCY-19/21-21/18K |
| Free Air Delivery | 19 m³/min |
| Working Pressure | 21 bar / 18 bar |
| Engine | Cummins / Yuchai diesel engine |
| Air Outlet Port | G1.5×1, G3/4×1 |
| Weight | 3,200 kg |
| Dimension (L×W×H) | 3,800 × 1,800 × 2,400 mm |
Product Details
Technical Selection
Key parameters for matching this machine to your job. Send us your hole diameter, depth and rock condition and our engineers will confirm the right configuration.
Working Pressure
21 bar / 18 bar
Free Air Delivery
19 m³/min
Weight
3,200 kg
Dimension (L×W×H)
3,800 × 1,800 × 2,400 mm
Not sure this model fits? Tell us the hole diameter and depth — we will confirm the matching rig, compressor and hammer.
Check with an engineerKey Advantages
Dual working pressure of 21 bar and 18 bar for flexible drilling and pneumatic tool operation
High free air delivery around 19 m³/min for demanding DTH and water well drilling
Reliable diesel engine and Kaishan screw airend for continuous heavy-duty performance
Four-wheel portable chassis with tow bar for easy jobsite relocation
Intelligent control panel with safety shutdown and operating data display
Efficient cooling system suitable for hot, dusty, and remote environments
Weatherproof canopy and rugged construction for harsh outdoor conditions
Applications
📍 Mining and Quarry Blast Hole Drilling
High-pressure air is required to drive DTH hammers for efficient rock drilling in open-pit mines and quarries.
Solution: The LGCY-19/21-21/18K delivers 21 bar pressure and around 19 m³/min flow, matching DTH hammer requirements for fast penetration and reliable operation.
📍 Water Well Drilling
Water well projects often need a portable, high-pressure compressor to support drilling in remote areas without grid power.
Solution: Its diesel engine and mobile chassis allow operation off-grid, while dual pressure settings adapt to different drilling depths and formations.
📍 Construction and Foundation Work
Construction sites use compressed air for pneumatic tools, anchor drilling, and ground improvement.
Solution: The compressor provides stable air output for multiple tools, and its towable design makes it easy to move as the work front changes.
📍 Pipeline Testing and Industrial Cleaning
Pipeline pressure testing and sandblasting require consistent high-volume air supply.
Solution: With high free air delivery and reliable pressure control, the LGCY-19/21-21/18K supports pipeline testing, cleaning, and surface preparation tasks.
LGCY Series Models
Compare specifications across the series to find the right model.
| ☑ | Model | Model | Free Air Delivery | Working Pressure | Engine | Air Outlet Port | Inquire |
|---|---|---|---|---|---|---|---|
| LGCY-19/21-21/18KThis model | LGCY-19/21-21/18K | 19 m³/min | 21 bar / 18 bar | Cummins / Yuchai diesel engine | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-21/21-23/18 | LGCY-21/21-23/18 | 21 m³/min (740 CFM) | 21 bar (305 psi) | Cummins / Yuchai diesel engine | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-17/18-18/15T | LGCY-17/18-18/15T | 17 m³/min (600 CFM) | 18 bar (261 psi) | Cummins or Yuchai diesel engine | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-17/18-18/15TK | LGCY-17/18-18/15TK | 17 m³/min (600 CFM) | 18 bar (261 psi) | Cummins / Yuchai diesel engine | G1.5 × 1, G3/4 × 1 | Get a Quote | |
| LGCY-19/21-21/18 | LGCY-19/21-21/18 | 21 m³/min (740 CFM) at 18 bar / 19 m³/min (670 CFM) at 21 bar | 18 bar (261 psi) / 21 bar (305 psi) | Cummins or Yuchai diesel engine, 6-cylinder, turbocharged | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-19/21-21/18X | LGCY-19/21-21/18X | 21 m³/min (740 CFM) | 18 bar (261 psi) | Cummins / Yuchai diesel engine | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-23/23-25/18K | LGCY-23/23-25/18K | 23 m³/min (812 CFM) | 23 bar (334 psi) | Cummins / Yuchai diesel engine | G1.5 × 1, G3/4 × 1 | Get a Quote | |
| LGCY-15/18-17/12T | LGCY-15/18-17/12T | — | — | — | — | Get a Quote | |
| LGCY-23/23-25/18 | LGCY-23/23-25/18 | 23 m³/min | 18 bar | Cummins / Yuchai | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-25/23-27/18K | LGCY-25/23-27/18K | 25 m³/min (883 CFM) | 23 bar (334 psi) | Cummins / Yuchai diesel engine, 18K series | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-26/25 | LGCY-26/25 | 26 m³/min (918 CFM) | 25 bar (362 psi) | Cummins diesel engine | G2×1, G1×1 | Get a Quote | |
| LGCY-26/25K | LGCY-26/25K | 26 m³/min (918 CFM) | 25 bar (362 psi) | Cummins / Yuchai diesel engine | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-21/13TK | LGCY-21/13TK | 21 m³/min (740 CFM) | 13 bar (190 psi) | Cummins or Yuchai diesel engine | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-27/25-29/18 | LGCY-27/25-29/18 | 27 m³/min at 25 bar, 29 m³/min at 18 bar | 25 bar / 18 bar | Cummins or Yuchai diesel engine | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-33/25 | LGCY-33/25 | 33 m³/min (1,165 CFM) | 25 bar (362 psi) | Cummins or Yuchai diesel engine | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-33/25K | LGCY-33/25K | 33 m³/min (1,165 CFM) | 25 bar (362 psi) | Cummins or Yuchai diesel engine | G2×1, G3/4×1 | Get a Quote | |
| LGCY-25/10TK | LGCY-25/10TK | 25 m³/min (883 CFM) | 10 bar (145 psi) | Cummins or Yuchai diesel engine | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-39/25 | LGCY-39/25 | 39 m³/min (1,377 CFM) | 25 bar (362 psi) | Cummins or Yuchai heavy-duty diesel | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-39/25A | LGCY-39/25A | 39 m³/min | 25 bar | Cummins / Yuchai diesel engine | G2×1, G1×1 | Get a Quote | |
| LGCY-30/8TK | LGCY-30/8TK | 30 m³/min (1060 CFM) | 8 bar (116 psi) | Cummins / Yuchai diesel engine | G1.5×1, G3/4×1 | Get a Quote | |
| LGCY-45/25-37/35V | LGCY-45/25-37/35V | 45 m³/min (1,590 CFM) | 25 bar (362 psi) | Cummins or Yuchai diesel engine | G2×1, G1×1 | Get a Quote | |
| LGCY-33/35 | LGCY-33/35 | 33 m³/min (1,165 CFM) | 35 bar (507 psi) | Cummins or Yuchai diesel engine | G2×1, G1×1 | Get a Quote | |
| LGCY-33/35A | LGCY-33/35A | 33 m³/min (1,165 CFM) | 35 bar (508 psi) | Cummins or Yuchai diesel engine | G1.5×1, G3/4×1 | Get a Quote | |
| LCGC-29/23 (crawler base) | LCGC-29/23 (crawler base) | 29 | 2.3 | — | G2×1, G³/₄×1 | Get a Quote |
Compare 2–3 models? Tick the boxes and send them together — we will quote each one for you.
Tip: select multiple models and click “Inquire All” — the selected models are added to the quote form automatically, so you get a faster quotation.
Not sure which model fits your project? Send us your working pressure and air demand — our engineers will recommend the right one.
Main Components
- Diesel engine
- Rotary screw airend
- Air intake filter and valve
- Oil separator tank
- Cooling system (radiator and oil cooler)
- Intelligent control panel
- Four-wheel mobile chassis with tow bar
- Weatherproof canopy and service doors
Working Principle
The Kaishan LGCY-19/21-21/18K works by converting diesel engine power into compressed air through a rotary screw airend. Ambient air enters the compressor through an intake filter and is mixed with oil inside the airend. Two intermeshing screws rotate to trap and compress the air-oil mixture, reducing volume and increasing pressure. The compressed mixture then passes into an oil separator, where most of the oil is removed and returned to the system for lubrication and cooling. The separated compressed air flows through an aftercooler and minimum pressure valve before reaching the discharge outlet. A control system monitors pressure, temperature, and engine parameters, adjusting the intake valve to match air demand. The dual-pressure capability is achieved by regulating the discharge pressure to either 21 bar or 18 bar, depending on the application. This design provides continuous, efficient air delivery with low vibration and long service life, making the unit suitable for mobile, heavy-duty field work.
Detailed Features
- ▸Dual pressure output: 21 bar / 18 bar
- ▸Free air delivery approximately 19 m³/min
- ▸Portable four-wheel design for easy towing
- ▸Diesel powered for off-grid operation
- ▸Reliable Kaishan screw airend
- ▸Intelligent control and protection system
- ▸Efficient cooling for high ambient temperatures
- ▸Rugged canopy for harsh environments
Packaging & Shipping
The Kaishan LGCY-19/21-21/18K is shipped as a complete mobile unit, normally secured on a steel frame or wooden skid for container transport. It can be loaded into a 40HQ container or shipped as break-bulk depending on destination and order quantity. Each unit is protected with anti-rust treatment, stretch film, and optional wooden case. Delivery time is typically 25–35 days after deposit, depending on order volume and production schedule. Main loading ports include Shanghai, Ningbo, and Qingdao. Shipping documents, operation manual, and spare parts list are provided with each shipment.
After-Sales Service
Kaishan provides a 12-month warranty or 2,000 operating hours (whichever comes first) for the LGCY-19/21-21/18K, covering major components under normal use. A 24-hour technical support hotline and online service are available for troubleshooting. We offer operator and maintenance training, either at our factory or on site, to help customers use the machine safely and efficiently. Genuine spare parts are supplied through our global network, with fast dispatch for critical components. Regular maintenance kits and service guidance are available to extend equipment life and reduce downtime.
Frequently Asked Questions
What is the free air delivery and working pressure of the LGCY-19/21-21/18K?+
The LGCY-19/21-21/18K delivers a free air delivery of 19 m³/min at dual working pressures of 21 bar and 18 bar. The dual-pressure design allows operators to match air output to different tools and drilling conditions. It is built for high-pressure, high-flow field applications.
What engine powers the LGCY-19/21-21/18K portable compressor?+
The LGCY-19/21-21/18K is powered by a Cummins or Yuchai diesel engine. The diesel engine drives the Kaishan screw airend for continuous heavy-duty performance. This allows off-grid operation where electricity is unavailable.
What equipment can run on the air supply of the LGCY-19/21-21/18K?+
With 19 m³/min free air delivery at 21 bar or 18 bar, the LGCY-19/21-21/18K suits DTH hammer drilling and pneumatic tool operation. The air outlet ports are G1.5×1 and G3/4×1. The higher pressure supports DTH drilling, while the lower pressure serves larger-volume applications.
Where can the LGCY-19/21-21/18K be used?+
The LGCY-19/21-21/18K is used for mining and quarry blast hole drilling, water well drilling, construction and foundation work, and pipeline testing and industrial cleaning. Its four-wheel portable chassis with tow bar allows easy jobsite relocation. The weatherproof canopy and efficient cooling system suit hot, dusty, and remote environments.
How much does the LGCY-19/21-21/18K weigh and what are its dimensions?+
The LGCY-19/21-21/18K weighs 3,200 kg and measures 3,800 × 1,800 × 2,400 mm (L×W×H). The unit is built on a four-wheel portable chassis with a tow bar. These dimensions and weight apply to the complete mobile unit.
How is the LGCY-19/21-21/18K packaged and shipped?+
The LGCY-19/21-21/18K is shipped as a complete mobile unit, normally secured on a steel frame or wooden skid for container transport. It can be loaded into a 40HQ container or shipped as break-bulk depending on destination and order quantity. Each unit is protected with anti-rust treatment, stretch film, and optional wooden case.
What warranty and after-sales support come with the LGCY-19/21-21/18K?+
Kaishan provides a 12-month warranty or 2,000 operating hours (whichever comes first) for the LGCY-19/21-21/18K, covering major components under normal use. A 24-hour technical support hotline and online service are available for troubleshooting. Operator and maintenance training is offered at the factory or on site.
What is the delivery time for the LGCY-19/21-21/18K?+
Delivery time for the LGCY-19/21-21/18K is typically 25–35 days after deposit, depending on destination and order quantity. The unit can be loaded into a 40HQ container or shipped as break-bulk. Each unit receives anti-rust treatment, stretch film, and optional wooden case protection.
Related Insights
Related Projects
Where This Machine Is Used
Is This Rig Right for My Project?
Answer seven questions about your hole, depth and rock — get a matched rig, compressor, hammer, bit and rod.
Compatible Drilling Rigs
Rigs this air supply can drive, matched on air demand and working pressure.
Best air-supply match shown first — the rest are still compatible.
Top matches
KG420B
- Hole range
- 90–130 mm
- Drilling depth
- 25 m
- Air demand
- 10–17 m³/min
Show 3 more compatible rigs(Other compatible rigs)
KQLG-115
- Hole range
- 90–152 mm
- Drilling depth
- 25 m
- Air demand
- 12–25 m³/min
KG520
- Hole range
- 105–152 mm
- Drilling depth
- 25 m
- Air demand
- 15–22 m³/min
KG430
- Hole range
- 90–152 mm
- Drilling depth
- 25 m
- Air demand
- 13–20 m³/min
Marked “lower range only” means the rig's upper air demand exceeds this unit's 19 m³/min, so it works with smaller hole sizes or a second compressor.
Need Technical Support?
Request information and get a quote from our engineers.
Recommended System
Rig + air compressor + drilling tools matched to your project. Get pre-matching advice from our engineers.
Recommended Equipment Configuration
Matched from real machine parameters — rig, compressor, hammer, bit and rod working as one system.
KG550
- Hole range
- 115–254 mm
Why matched
Covers the lower range of the required 15 bar / 35 m³/min air demand — this unit is rated 18 bar / 19 m³/min, so pair it with smaller hole sizes or add a second compressor.
K8
- Hole range
- 195–254
- Air flow
- 12–31 m³/min
- Working pressure
- 10+ bar
- Bit shank
- K8** / COP84/DHD380
Why matched
Hole range 195–254 mm covers your requirement 115–254 mm.
K6
- Hole range
- 152–300
- Pressure class
- 高风压 (High pressure)
Why matched
Hole range 152–300 mm covers your requirement 115–254 mm.
76mm Drill Rods
- Rod spec
- Φ76 / Φ89 / Φ102 mm
Why matched
Matches the rig's official rod specification Φ76 / Φ89 / Φ102 mm.
System requirement: 18 bar / 19 m³/min · 115–254 mm
