📦 Drilling Air Compressors
Kaishan LGCY-19/21-21/18 Diesel Screw Compressor
Model: LGCY-19/21-21/18
The Kaishan LGCY-19/21-21/18 portable diesel screw compressor delivers up to 21 m³/min free air delivery at 18 bar working pressure, making it a powerful solution for heavy-duty drilling, mining, and construction applications. Powered by a reliable Cummins or Yuchai diesel engine, this two-stage screw compressor combines high efficiency with rugged mobility. Its advanced air-end design ensures stable output, low fuel consumption, and long service life even in the most demanding environments. With a robust chassis, automatic control system, and easy maintenance access, the LGCY-19/21-21/18 is engineered for continuous operation on remote job sites. Whether you are running DTH hammers, pneumatic tools, or sandblasting equipment, this compressor provides the consistent airflow and pressure you need to maximize productivity. Trusted by professionals worldwide, Kaishan's LGCY series represents the benchmark for portable diesel air compressors.
Technical Specifications
| Model | LGCY-19/21-21/18 |
| Free Air Delivery | 21 m³/min (740 CFM) at 18 bar / 19 m³/min (670 CFM) at 21 bar |
| Working Pressure | 18 bar (261 psi) / 21 bar (305 psi) |
| Engine | Cummins or Yuchai diesel engine, 6-cylinder, turbocharged |
| Air Outlet Port | G1.5×1, G3/4×1 |
| Weight | 3,200 kg |
| Dimension (L×W×H) | 3,800 × 1,800 × 2,500 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
18 bar (261 psi) / 21 bar (305 psi)
Free Air Delivery
21 m³/min (740 CFM) at 18 bar / 19 m³/min (670 CFM) at 21 bar
Weight
3,200 kg
Dimension (L×W×H)
3,800 × 1,800 × 2,500 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 pressure capability: 19 m³/min @ 21 bar or 21 m³/min @ 18 bar for flexible operation
Two-stage screw air-end for high efficiency and low fuel consumption
Powered by reliable Cummins or Yuchai diesel engine
Heavy-duty chassis with towbar and brakes for safe highway towing
Advanced electronic control system with automatic protection
Large fuel tank for extended runtime on remote sites
Easy maintenance access with lockable enclosure doors
Designed for continuous operation in harsh environments
Applications
📍 Mining & Quarrying
Powers DTH hammers for blast hole drilling in hard rock, requiring high pressure and consistent airflow.
Solution: The LGCY-19/21-21/18 delivers 21 m³/min at 18 bar, ensuring fast penetration and reliable operation even in remote mines.
📍 Construction & Infrastructure
Used for pneumatic piling, rock bolting, concrete spraying, and powering pneumatic tools on large construction sites.
Solution: With its high flow rate and robust design, this compressor supports multiple tools simultaneously and withstands tough job site conditions.
📍 Water Well Drilling
Provides compressed air for air hammers and mud pumps in water well drilling operations.
Solution: The dual pressure setting allows optimization for different drilling depths and formations, improving drilling efficiency.
📍 Oil & Gas Exploration
Supplies air for seismic drilling, pipeline testing, and emergency air in oil and gas fields.
Solution: The reliable diesel engine and advanced control system ensure continuous operation in remote and hazardous environments.
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-19/21-21/18This model | 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-23/23-25/18 | LGCY-23/23-25/18 | 23 m³/min | 18 bar | Cummins / Yuchai | 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-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-15/18-17/12T | LGCY-15/18-17/12T | — | — | — | — | Get a Quote | |
| LGCY-19/21-21/18K | 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-21/13TK | 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-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-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-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-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-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-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-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 | |
| LCGC-29/23 (crawler base) | LCGC-29/23 (crawler base) | 29 | 2.3 | — | G2×1, G³/₄×1 | 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 |
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
- Two-stage screw air-end
- Cummins or Yuchai diesel engine
- Heavy-duty air intake filter
- Oil cooler and aftercooler
- Electronic control panel
- Fuel tank
- Battery and starting system
- Towbar and chassis with brakes
Working Principle
The Kaishan LGCY-19/21-21/18 operates on the principle of positive displacement rotary screw compression. Air is drawn through a heavy-duty filter into the first-stage screw element, where it is compressed to an intermediate pressure. The air then passes through a cooling system before entering the second-stage screw element, where it is further compressed to the final working pressure. The two-stage design reduces thermal load and improves efficiency. The compressed air then flows through an aftercooler and moisture separator before exiting the discharge port. The screw elements are driven by a diesel engine via a coupling or gearbox. An electronic control unit monitors pressure, temperature, and engine speed, adjusting the intake valve to match air demand. This ensures stable output and minimizes fuel consumption. The oil circuit lubricates and seals the screws, and the oil is cooled and filtered for reuse. The entire system is mounted on a portable chassis, making it easy to move between job sites.
Detailed Features
- ▸High free air delivery up to 21 m³/min
- ▸Working pressure up to 21 bar
- ▸Dual pressure capability for versatility
- ▸Fuel-efficient two-stage compression
- ▸Reliable diesel engine from Cummins or Yuchai
- ▸Rugged portable design for easy towing
- ▸Advanced electronic monitoring and protection
- ▸Easy access for maintenance and service
Packaging & Shipping
The Kaishan LGCY-19/21-21/18 is shipped in a protective enclosure suitable for sea transport. It is typically loaded into a 40-foot container or flat rack, depending on configuration. The unit is secured with heavy-duty straps and protected with anti-corrosion wrap. Delivery time is approximately 30-45 days after order confirmation, depending on destination. We ship from major Chinese ports such as Shanghai or Ningbo. For urgent orders, air freight or expedited sea freight can be arranged. All units are inspected and tested before shipment, and a comprehensive packing list and test report are provided.
After-Sales Service
Kaishan offers a 12-month warranty or 2000 operating hours (whichever comes first) on the LGCY-19/21-21/18. Our global service network provides 24-hour technical support via phone or email. We offer on-site training for operators and maintenance personnel. Genuine spare parts are available from our regional warehouses, ensuring quick delivery. Preventive maintenance kits and extended warranty options are also available. Our goal is to maximize uptime and minimize total cost of ownership for our customers.
Frequently Asked Questions
What are the free air delivery and working pressure of the LGCY-19/21-21/18?+
The LGCY-19/21-21/18 delivers 21 m³/min (740 CFM) at 18 bar (261 psi) or 19 m³/min (670 CFM) at 21 bar (305 psi). This dual pressure capability lets operators match the compressor to different job requirements. Both ratings are produced by the same two-stage screw air-end.
What engine powers the LGCY-19/21-21/18 diesel screw compressor?+
The LGCY-19/21-21/18 is powered by a Cummins or Yuchai diesel engine, 6-cylinder and turbocharged. The two-stage compression system reduces heat load and improves volumetric efficiency. The engine is matched to the air-end for stable output in continuous operation.
What equipment can run on the air supply of the LGCY-19/21-21/18?+
With 21 m³/min at 18 bar or 19 m³/min at 21 bar, the LGCY-19/21-21/18 supplies DTH hammers, pneumatic tools and sandblasting equipment. The air outlet ports are G1.5×1 and G3/4×1. This airflow and pressure range supports high-pressure, high-flow drilling work.
Which applications and sites is the LGCY-19/21-21/18 suitable for?+
The LGCY-19/21-21/18 is used in mining and quarrying, construction and infrastructure, water well drilling, and oil and gas exploration. Its heavy-duty chassis with towbar and brakes allows safe highway towing, and the large fuel tank supports extended runtime on remote sites. It is designed for continuous operation in harsh environments.
How is the LGCY-19/21-21/18 maintained and serviced?+
The LGCY-19/21-21/18 has easy maintenance access through lockable enclosure doors, and an advanced electronic control system with automatic protection. Kaishan offers a 12-month warranty or 2000 operating hours, whichever comes first, plus 24-hour technical support and on-site operator training. Genuine spare parts and preventive maintenance kits are available from regional warehouses.
How is the LGCY-19/21-21/18 packaged and shipped?+
The LGCY-19/21-21/18 is shipped in a protective enclosure suitable for sea transport, typically loaded into a 40-foot container or flat rack depending on configuration. The unit is secured with heavy-duty straps and protected with anti-corrosion wrap. Delivery time is approximately 30-45 days after order confirmation, depending on destination.
What are the dimensions and weight of the LGCY-19/21-21/18?+
The LGCY-19/21-21/18 measures 3,800 × 1,800 × 2,500 mm (L×W×H) and weighs 3,200 kg. The rugged portable design with towbar and brakes allows easy towing between job sites. These dimensions apply to the standard configuration.
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
