📦 Drilling Air Compressors
Kaishan LGCY-19/21-21/18X Portable Diesel Screw Compressor
Model: LGCY-19/21-21/18X
The Kaishan LGCY-19/21-21/18X portable diesel screw compressor delivers up to 21 m³/min of free air delivery at 18 bar working pressure, making it a powerful solution for heavy-duty industrial applications. Built with a robust diesel engine and advanced screw air-end technology, this two-stage compressor ensures high efficiency, reliable performance, and low fuel consumption in demanding environments. Its compact, mobile design allows easy transportation and quick setup on construction sites, mining operations, and quarry blasting projects. The LGCY-19/21-21/18X is engineered for continuous operation, featuring intelligent control systems, safety protections, and easy maintenance access. Whether you need compressed air for drilling, sandblasting, or pneumatic tools, this Kaishan model provides consistent airflow and pressure to maximize productivity. With a focus on durability and cost-effective operation, it is an ideal choice for contractors and rental fleets seeking a dependable high-pressure air compressor.
Best For
Technical Specifications
| Model | LGCY-19/21-21/18X |
| Free Air Delivery | 21 m³/min (740 CFM) |
| Working Pressure | 18 bar (261 psi) |
| 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 × 2,500 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)
Free Air Delivery
21 m³/min (740 CFM)
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
Two-stage rotary screw air end for high efficiency at 18 bar
21 m³/min free air delivery for demanding applications
Reliable diesel engine with low fuel consumption
Intelligent control system with auto-protection
Rugged mobile chassis with pneumatic tires for easy towing
Sound-attenuated canopy for reduced noise emissions
Easy maintenance access and extended service intervals
Corrosion-resistant materials for durability in harsh environments
Applications
📍 Water Well Drilling
High-pressure air is essential for DTH hammer drilling in water well projects.
Solution: The LGCY-19/21-21/18X provides 21 m³/min at 18 bar, ensuring fast penetration and efficient hole cleaning.
📍 Mining and Quarrying
Blast hole drilling requires reliable, high-volume compressed air in remote areas.
Solution: With its mobile design and robust diesel engine, this compressor delivers consistent air power for drilling rigs, even in tough terrain.
📍 Construction and Piling
Foundation piling and ground improvement often need high-pressure air for pneumatic tools.
Solution: The LGCY-19/21-21/18X supports pile drivers and other pneumatic equipment with stable airflow and pressure.
📍 Sandblasting and Surface Preparation
Sandblasting demands large volumes of clean, dry air at consistent pressure.
Solution: This compressor's high capacity and efficient filtration ensure optimal blasting performance and surface quality.
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-19/21-21/18XThis model | 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-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-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
- Diesel engine
- Two-stage rotary screw air end
- Air intake filter
- Oil separator tank
- Cooling system (radiator and fan)
- Intelligent control panel
- Discharge valves and piping
- Mobile chassis with tires and suspension
Working Principle
The Kaishan LGCY-19/21-21/18X operates on the principle of rotary screw compression, using two intermeshing helical screws (rotors) to compress air. Ambient air enters through an intake filter and is mixed with oil for lubrication and sealing. The male rotor, driven by the diesel engine, rotates and meshes with the female rotor, reducing the volume between them and increasing air pressure. The compressed air-oil mixture then passes through a separator, where oil is removed and returned to the system, while clean air exits through the discharge valve. A two-stage configuration means the air is compressed in two sequential stages, with intercooling between stages to improve efficiency and reduce thermal stress. The diesel engine provides power through a coupling or gearbox, and the intelligent control system monitors and adjusts operating parameters to maintain optimal performance. This design ensures high efficiency, low noise, and long service life, making it ideal for continuous heavy-duty use.
Detailed Features
- ▸High free air delivery of 21 m³/min
- ▸Working pressure of 18 bar for demanding tasks
- ▸Two-stage compression for energy efficiency
- ▸Diesel engine with low emissions and fuel consumption
- ▸Intelligent control with auto fault diagnosis
- ▸Rugged and mobile design for easy transport
- ▸Sound-attenuated canopy for noise reduction
- ▸Easy maintenance access and long service intervals
Packaging & Shipping
The Kaishan LGCY-19/21-21/18X is shipped in a protective wax coating and securely fastened onto a flat rack or in a 40-foot container, depending on configuration. Standard export packaging includes stretch wrapping and optional wooden crating for extra protection. Delivery time is typically 30-45 days after order confirmation, depending on quantity and destination. We ship from major Chinese ports such as Shanghai or Ningbo, and can arrange FOB, CIF, or DDP terms as required. All units are inspected and tested before shipment to ensure they arrive in perfect working condition.
After-Sales Service
Kaishan offers a comprehensive after-sales service package for the LGCY-19/21-21/18X. Each unit comes with a 12-month warranty or 2000 operating hours, whichever comes first, covering major components. We provide 24/7 technical support via phone or email, and can dispatch engineers for on-site assistance if needed. Training for operators and maintenance staff is available at our factory or on-site. A full range of genuine spare parts is stocked in regional warehouses for quick delivery. Our global service network ensures minimal downtime and maximum productivity for your investment.
Frequently Asked Questions
What are the free air delivery and working pressure of the LGCY-19/21-21/18X?+
The LGCY-19/21-21/18X delivers 21 m³/min (740 CFM) of free air delivery at a working pressure of 18 bar (261 psi). These figures come from its two-stage rotary screw air end. This combination supports high-pressure, high-flow work such as DTH drilling.
What engine powers the LGCY-19/21-21/18X?+
The LGCY-19/21-21/18X uses a Cummins or Yuchai diesel engine. The diesel engine is matched to the two-stage air end for low fuel consumption. The intelligent control panel monitors pressure, temperature and engine parameters.
What equipment can run on the air supply of the LGCY-19/21-21/18X?+
With 21 m³/min (740 CFM) at 18 bar (261 psi), the LGCY-19/21-21/18X can supply DTH hammers and button bits used in drilling work. The air outlet ports are G1.5×1 and G3/4×1. Match the air consumption of your DTH hammer and drilling tools to the 21 m³/min free air delivery before use.
Where can the LGCY-19/21-21/18X be used?+
The LGCY-19/21-21/18X is applied in water well drilling, mining and quarrying, construction and piling, and sandblasting and surface preparation. Its rugged mobile chassis with pneumatic tires supports towing across job sites. The sound-attenuated canopy reduces noise emissions.
How is the LGCY-19/21-21/18X maintained?+
The LGCY-19/21-21/18X has easy maintenance access and extended service intervals. The intelligent control system provides auto-protection with automatic shutdown for low oil pressure, high temperature and clogged filters. Corrosion-resistant materials are used for durability in harsh environments.
How is the LGCY-19/21-21/18X packaged and shipped?+
The LGCY-19/21-21/18X is shipped in a protective wax coating and securely fastened onto a flat rack or in a 40-foot container, depending on configuration. Standard export packaging includes stretch wrapping and optional wooden crating. Delivery time is typically 30-45 days after order confirmation, depending on quantity and destination.
What warranty and after-sales support come with the LGCY-19/21-21/18X?+
Each LGCY-19/21-21/18X comes with a 12-month warranty or 2000 operating hours, whichever comes first, covering major components. Technical support is available 24/7 via phone or email, and engineers can be dispatched for on-site assistance if needed. Operator and maintenance training is available at the factory or on-site.
What are the weight and dimensions of the LGCY-19/21-21/18X?+
The LGCY-19/21-21/18X weighs 3,200 kg and measures 3,800 × 1,800 × 2,500 mm (L×W×H). The rugged mobile chassis with pneumatic tires allows easy towing. These dimensions cover the unit with its sound-attenuated canopy.
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
KG430
- Hole range
- 90–152 mm
- Drilling depth
- 25 m
- Air demand
- 13–20 m³/min
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
Marked “lower range only” means the rig's upper air demand exceeds this unit's 21 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 / 21 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 / 21 m³/min · 115–254 mm
