Tunnel construction, slope stabilization, and building renovation projects demand efficient concrete application methods. Traditional hand-troweling costs time and labor, while large shotcrete rigs cost too much for smaller contractors. Workers face physical strain from manual application, and inconsistent coverage leads to material waste and rework. YG Machinery’s concrete spraying equipment solves these problems with compact, portable machines that deliver consistent material flow. The YG-311 to YG-711 models offer capacities from 3 to 6m³/h, 3 Mpa pressure, and horizontal conveying up to 50 meters. These mortar sprayers have gained attention across the USA and Latin America. 【WhatsApp/WeChat/Skype/Phone】+86 159 3715 2330
Product Core Parameters-OEM Support
| Model | YG-311 | YG-318 | YG-711 |
| Capacity | 3m³/h | 3-5m³/h | 4-6m³/h |
| Pressure | 3 Mpa | 3 Mpa | 3 Mpa |
| Material Ratio | 0.7-1:1:3 (Water, Ash, Sand) | 0.7-1:1:3 (Water, Ash, Sand) | 0.7-1:1:3 (Water, Ash, Sand) |
| Voltage | 220V/380V 50Hz | 380V three-phase 50Hz | 380V three-phase 50Hz |
| Main Motor Power | 4kw | 7.5kw | 7.5kw |
| Particle Size | Below 4mm | Below 8mm | Below 8mm |
| Convey Distance | Horizontal 30m | Horizontal 50m | Horizontal 50m |
| Vertical 20m | Vertical 30m | Vertical 30m | |
| Volume | 60L | 80L | 100L |
| Air Consumption | 0.3m³/min | 0.3m³/min | 0.3m³/min |
| Weight | 200kg | 320kg | 340kg |
Case Study One: USA – Tunnel Lining Rehabilitation
Client Background
A US-based civil contractor specializing in tunnel rehabilitation projects won a contract for shotcrete lining repair on a 2.5-kilometer railway tunnel in the northeastern United States. The project required applying a 50mm thick structural shotcrete layer to tunnel walls and archways.
Client Challenge
The contractor needed a concrete sprayer machine for confined tunnel spaces. The existing equipment was too large to maneuver in narrow sections, and manual application could not meet the 8-week deadline. The client required a compact concrete spraying equipment solution with 3 Mpa pressure and horizontal reach of at least 40 meters.
YG Solution
YG recommended the YG-711 concrete spraying equipment with 4-6m³/h capacity and 3 Mpa pressure. The 7.5kw motor provides power for wet-mix shotcrete. The 100L hopper supports continuous spraying without frequent refills. The 8mm particle size capacity handles standard shotcrete mixes. The 50m horizontal reach and 30m vertical reach allowed operators to position the machine at the tunnel entrance and cover the entire working face.
Client Feedback and Results
“The YG-711 helped us complete the tunnel lining work 2 weeks ahead of schedule. The consistent 3 Mpa pressure gave us uniform coverage with much less rebound than our old equipment.” The project supervisor confirmed the 340kg weight allowed easy transport through tunnel access points without disassembly. The contractor purchased a second unit for future underground projects.
Case Study Two: Chile – Slope Stabilization and Erosion Control
Client Background
A Chilean construction company working on road infrastructure projects secured a contract for slope stabilization on a 3-kilometer mountain highway section where soil erosion threatened road integrity.
Client Challenge
The project required spraying a cement-stabilized mortar layer onto steep slopes with gradients exceeding 40 degrees. The remote site lacked three-phase power, requiring equipment that could run on a generator. The client needed a concrete spraying equipment solution with 220V capability and lightweight design for transport on narrow mountain access roads. The cement render spray equipment had to handle fine aggregate mixes up to 4mm particle size.
YG Solution
YG supplied the YG-311 concrete spraying equipment for this project. This model operates on 220V power and weighs only 200kg for easy transport in pickup trucks. The 3m³/h capacity and 4mm particle size suit the fine mortar mix. The 3 Mpa pressure delivers consistent flow to the spray nozzle. The 60L hopper supports 20-30 minutes of continuous spraying between refills.
Client Feedback and Results
“The YG-311 ran perfectly off our portable generator for 12 straight days. We completed the entire slope stabilization on schedule and plan to use this unit on all our future road projects.” The project engineer confirmed the 30m horizontal reach allowed the crew to cover large sections without repositioning, and the 200kg weight enabled easy transport on mountain roads.
Key Features That Matter for Concrete Spraying Projects
- Consistent material flow without pulsation ensures uniform coverage on walls and overhead surfaces
- Simple operation with basic training – crews learn the system quickly
- Portable design allows easy movement between job sites and tight access areas
- Quick setup and cleanup reduce downtime between pours
- Durable construction withstands demanding job site conditions
- Low maintenance requirements keep operating costs manageable
Concrete Spraying Equipment for Sale – YG Machinery
YG Machinery offers reliable concrete spraying equipment for sale for US, Chilean, and worldwide construction projects. Our concrete sprayer machine series provides solutions for tunnel rehabilitation, slope stabilization, and building repair applications. Contact YG Machinery with your project type, conveying distance, and power availability. Our team provides transparent pricing, model selection support, and global shipping. 【WhatsApp/WeChat/Skype/Phone】+86 159 3715 2330
Frequently Asked Questions
Q: What particle size does the concrete spraying equipment handle?
The YG-311 handles particles below 4mm for fine mortar. The YG-318 and YG-711 handle particles below 8mm for shotcrete and larger aggregate mixes. For more comparison on automatic spraying solutions, check Manual Plastering Vs Automatic Mortar Spraying Machine.
Q: What power source does the concrete sprayer machine require?
The YG-311 operates on 220V or 380V for generator use. The YG-318 and YG-711 require 380V three-phase power.
Q: How far can the concrete spraying equipment convey material?
Horizontal conveying ranges from 30m on the YG-311 to 50m on the YG-318 and YG-711. Vertical conveying reaches 20m, 30m, and 30m respectively.
Q: What material ratio does the concrete spraying equipment accept?
All models accept a 0.7-1:1:3 ratio (water:cement:sand) for most mortar and shotcrete applications.
Q: How often does the concrete sprayer machine require cleaning?
Clean the hopper and hose system immediately after each use. The machine uses 0.3m³/min air consumption, and regular maintenance extends service life.
