50MPa High Pressure Sand Blasting Machine
1. Brief Profile
The 50MPa High Pressure Sand Blasting Machine is an industrial-grade surface treatment equipment engineered for extreme-duty applications, leveraging ultra-high pressure (50 megapascals, equivalent to ~7250 psi) to remove stubborn contaminants, thick coatings, and tough residues from high-hardness materials. Unlike standard sandblasters (typically 5–15MPa), this machine delivers exceptional abrasive velocity (up to 300 m/s) and impact force, making it capable of tackling tasks that conventional equipment cannot—such as removing 10+mm thick rust layers from steel structures or stripping industrial-grade epoxy coatings from concrete.
Constructed with heavy-duty components to withstand extreme pressure, the machine features a reinforced steel frame, high-pressure hoses (rated for 75MPa, 50% safety margin), and wear-resistant abrasive delivery systems. Its core design prioritizes both performance and safety: integrated pressure relief valves prevent overpressurization, while ergonomic operator controls ensure precise pressure adjustment for different materials (e.g., stainless steel vs. concrete).
A key advantage is its efficiency—50MPa pressure reduces blasting time by 40–60% compared to 15MPa machines, critical for large-scale industrial projects (e.g., ship hull maintenance, oil pipeline cleaning). It is compatible with a range of abrasives, including steel grit, aluminum oxide, and silicon carbide, adapting to diverse surface treatment needs. Additionally, advanced dust collection systems (capturing 95%+ of airborne particles) ensure compliance with strict industrial safety standards (e.g., OSHA, EU REACH), making it suitable for indoor and outdoor use.
In summary, this machine fills a critical gap in heavy-industry surface treatment, delivering unmatched power for extreme contaminants while maintaining operational safety and efficiency—essential for sectors like oil & gas, maritime, and heavy manufacturing.
2. Application
The 50MPa High Pressure Sand Blasting Machine is tailored to industries requiring extreme blasting power to handle high-hardness materials and stubborn contaminants. Its ability to reduce processing time and tackle otherwise unmanageable tasks makes it indispensable for heavy-industry operations. Below are its key application areas:
2.1 Oil & Gas Industry
In oil and gas operations, pipelines, storage tanks, and offshore platforms are prone to thick rust, scale, and hydrocarbon deposits—all of which compromise structural integrity and flow efficiency. The 50MPa machine efficiently removes these contaminants: for example, it strips 5–10mm thick rust from carbon steel pipelines (diameters 0.5–2m) in half the time of standard machines, ensuring quick return to service. It also cleans the inner walls of storage tanks (used for crude oil or chemicals) by blasting with steel grit, removing resinous deposits that reduce storage capacity. For offshore platforms, it handles saltwater-induced corrosion on steel jackets, extending the structure’s service life by 10–15 years.
2.2 Maritime and Shipbuilding
Ship hulls, propellers, and marine engines accumulate heavy marine growth (barnacles, algae) and thick anti-fouling coatings over time, increasing fuel consumption and reducing speed. The 50MPa machine blasts through 3–5mm thick anti-fouling coatings on hulls (steel or aluminum) without damaging the base material, restoring hydrodynamic efficiency. It also cleans propellers (removing barnacle buildup that causes vibration) and removes rust from ship decks (preparing surfaces for non-slip coating application). For shipyards, it accelerates the hull maintenance process, reducing dry-dock time by 30–40%—a critical cost-saving factor for maritime operations.
2.3 Heavy Manufacturing and Machinery
Heavy machinery (mining equipment, construction vehicles, power plant turbines) uses high-hardness components (e.g., manganese steel buckets, titanium turbine blades) that require aggressive cleaning or surface preparation. The machine removes 10+mm thick concrete or rock deposits from mining excavator buckets, restoring digging efficiency. It also strips industrial paint and scale from construction crane booms (steel, 50–100mm thick) before welding or recoating, ensuring strong material bonding. For power plants, it cleans turbine rotors (removing carbon deposits that reduce efficiency) using fine aluminum oxide abrasive, maintaining the rotor’s precision geometry while eliminating contaminants.
2.4 Infrastructure and Concrete Restoration
Large-scale concrete structures (bridges, dams, industrial floors) often have thick epoxy coatings, graffiti, or surface spalling that standard machines cannot remove. The 50MPa machine strips 2–5mm thick epoxy from bridge decks (concrete) without chipping the surface, preparing it for waterproofing. It also removes deep-set graffiti from concrete walls (common in urban infrastructure) and cleans spalled concrete on dam faces, exposing sound material for repair. For airport runways, it removes rubber deposits (from aircraft tires) that reduce friction, ensuring safe takeoffs and landings—all while minimizing damage to the runway’s concrete surface.
3. Features
The 50MPa High Pressure Sand Blasting Machine is defined by features engineered to handle extreme pressure while ensuring safety, efficiency, and adaptability. These features address the unique challenges of heavy-industry blasting, from contaminant removal to operator protection:
3.1 Ultra-High Pressure System with Safety Redundancy
The machine’s core pressure system balances power with fail-safe protection:
Dual-Stage Pressure Pump: A piston pump (power 55–75kW) generates 50MPa pressure, with a secondary booster pump to maintain consistent pressure during operation (prevents pressure drops when abrasive flow increases). The pump is made from high-strength alloy steel (42CrMo) to withstand extreme stress, with a service life of 8000+ hours.
Redundant Safety Valves: Two independent pressure relief valves (set to 55MPa) prevent overpressurization, while a pressure gauge (accuracy ±0.5MPa) provides real-time pressure monitoring. If pressure exceeds 52MPa, an automatic shutdown system activates, cutting power to the pump and protecting components from damage.
High-Pressure Hose Assembly: Hoses (length 10–20m) are reinforced with 6 layers of steel wire (rated for 75MPa) and coated with oil-resistant rubber. Quick-connect couplings (brass, 3/4” NPT) feature pressure-locking mechanisms to prevent accidental disconnection under high pressure.
3.2 Abrasive Compatibility and Delivery Efficiency
The machine adapts to diverse abrasives and ensures efficient delivery to maximize impact:
Multi-Abrasive Compatibility: Designed for heavy-duty abrasives (steel grit 16–60 mesh, aluminum oxide 24–80 mesh, silicon carbide 46–120 mesh) and can handle abrasive sizes up to 2mm. A adjustable abrasive feed valve (ceramic-lined for wear resistance) controls flow rate (50–200 kg/h), matching it to pressure for optimal impact.
Abrasive Hopper and Agitation System: A 200–500L steel hopper (with a conical bottom) prevents abrasive bridging (common with steel grit). A vibratory agitator (100–200W) ensures steady abrasive flow, even for dense abrasives (e.g., steel shot, density 7.8 g/cm³). The hopper includes a level sensor that alerts operators when refilling is needed.
3.3 Precision Control and Operator Comfort
Despite its high power, the machine offers precise control to avoid material damage and reduce operator fatigue:
Variable Pressure Control: A digital pressure regulator (adjustable in 1MPa increments) lets operators reduce pressure for softer materials (e.g., 20–30MPa for aluminum) or max it at 50MPa for steel. This prevents over-blasting (e.g., pitting stainless steel) while maintaining efficiency.
Ergonomic Blasting Gun: The gun (weight <2kg) features a rubberized grip and trigger guard, reducing hand fatigue during extended use (4+ hours). A pressure-sensitive trigger allows fine control over blasting duration, while a built-in heat shield protects the operator from hot abrasive.
3.4 Advanced Dust and Overspray Management
To meet strict environmental and safety standards, the machine includes robust dust control:
High-Efficiency Dust Collector: A cyclone separator + HEPA filter system captures 95%+ of airborne abrasive particles (down to 0.3μm). The cyclone removes large particles (≥10μm), while the HEPA filter traps fines—complying with OSHA’s 5 mg/m³ limit for respirable dust. The collector’s fan (power 15–22kW) generates airflow of 10,000–15,000 m³/h, ensuring effective dust capture.
Containment Shields (Optional): For indoor use, portable containment shields (vinyl or steel) enclose the blasting area, preventing overspray from damaging nearby equipment. The shields include viewing windows (polycarbonate, impact-resistant) and dust extraction ports that connect to the collector.
4. Main parts
The 50MPa High Pressure Sand Blasting Machine consists of heavy-duty, pressure-resistant components—each designed to handle 50MPa operation while ensuring reliability and safety. These parts work in tandem to deliver extreme blasting power, making them critical for heavy-industry applications:
4.1 High-Pressure Pump Assembly
The heart of the machine, responsible for generating 50MPa pressure:
Dual-Stage Piston Pump: A horizontal piston pump with 3–5 pistons (made from ceramic-coated steel) that delivers a flow rate of 100–150 L/min. The pump is driven by a 55–75kW electric motor (3-phase, 380V/50Hz) via a gearbox (reduction ratio 1:10), ensuring smooth power transmission. It includes a suction filter (100μm mesh) to prevent debris from entering the pump, extending piston life.
Pressure Relief and Regulation Valves: Two parallel pressure relief valves (spring-loaded, set to 55MPa) mounted on the pump outlet. A proportional pressure control valve (electrically actuated) adjusts pressure from 10–50MPa, with feedback from a pressure transducer (accuracy ±0.1MPa) to maintain stability.
Oil Cooling System: A forced-air oil cooler (capacity 50L) keeps the pump’s hydraulic oil at 40–60°C, preventing overheating under continuous operation. The cooler includes a temperature sensor that triggers an alarm if oil temperature exceeds 70°C.
4.2 Abrasive Delivery System
Ensures consistent, high-pressure delivery of abrasives to the blasting gun:
Heavy-Duty Abrasive Hopper: A 200–500L cylindrical hopper made from 6mm thick carbon steel (Q235B), with a 60° conical bottom to prevent abrasive bridging. The hopper’s top is fitted with a dust-tight lid (to prevent contamination) and a level sensor (ultrasonic, range 0–500mm) that sends low-level alerts to the control panel.
Vibratory Abrasive Feeder: A 150–300W electromagnetic feeder mounted at the hopper outlet, delivering abrasives at 50–200 kg/h. The feeder’s amplitude is adjustable via the control panel, matching abrasive flow to pressure (e.g., 200 kg/h for 50MPa steel grit blasting).
High-Pressure Abrasive Mixer: A stainless steel mixer (304 grade) that combines high-pressure water/air (from the pump) with abrasives. The mixer uses a venturi design to accelerate the mixture to 250–300 m/s before sending it to the blasting gun, ensuring maximum impact force.
4.3 Blasting Gun and Hose Assembly
Delivers the high-pressure abrasive mixture to the surface:
Reinforced High-Pressure Hose: 10–20m long hoses with 6 layers of high-tensile steel wire (breaking strength 75MPa) and an inner tube of nitrile rubber (resistant to abrasive wear). The hose has a minimum bend radius of 300mm, allowing flexibility for large-scale projects (e.g., ship hulls).
Wear-Resistant Blasting Gun: The gun body is made from aluminum alloy (6061-T6) for lightweight durability, with a tungsten carbide nozzle (orifice size 3–8mm) that resists abrasive wear (service life 200–300 hours for steel grit). The gun includes a pressure-sensitive trigger (with a safety lock) and a rubber grip (Shore A 60–70) for ergonomic use.
Nozzle Holders and Extensions: Interchangeable nozzle holders (compatible with 3–8mm orifices) allow quick nozzle replacement. For hard-to-reach areas (e.g., pipeline interiors), 1–2m long steel extensions (rated for 50MPa) attach to the gun, maintaining pressure and abrasive flow.
4.4 Control and Safety System
Manages operation and protects operators/components from high-pressure risks:
PLC Control Panel: A Siemens S7-1200 or equivalent PLC that monitors and controls pressure, abrasive flow, and temperature. The panel features a 10-inch touchscreen HMI (waterproof, IP65) displaying real-time parameters (pressure, flow rate, hopper level) and allowing operators to save 10+ custom blasting profiles (e.g., “50MPa steel grit pipeline cleaning”).
Safety Interlocks: Multiple safety features prevent accidents: emergency stop buttons (mounted on the panel and gun), a door interlock (shuts down the pump if the hopper lid is open), and a pressure relief valve override (manual activation for maintenance).
Dust Collection Unit: A 15–22kW cyclone dust collector with a 1000L dust bin. The cyclone uses centrifugal force to separate 90% of dust particles, while a HEPA filter (efficiency 99.97% for 0.3μm) captures the rest. The unit includes a pulse-jet cleaning system (compressed air 0.6MPa) to clear filter clogs automatically.
5. Basic Parameter
The basic parameters of the 50MPa High Pressure Sand Blasting Machine are tailored to its extreme-duty design, ensuring it delivers maximum power while maintaining safety and compatibility with heavy-industry needs. These parameters guide equipment selection and operation for diverse applications:
5.1 Pressure and Power Parameters
Define the machine’s core blasting capability:
Maximum Operating Pressure: 50MPa (7250 psi), adjustable from 10–50MPa in 1MPa increments. Minimum pressure (10MPa) is for delicate tasks (e.g., aluminum surface preparation), while 50MPa is for extreme contaminants (thick rust, industrial coatings).
Pump Power: 55–75kW (electric motor, 3-phase, 380V/50Hz or 480V/60Hz). Higher power (75kW) models handle continuous operation (8+ hours/day), while 55kW models are suitable for intermittent use (e.g., maintenance tasks).
Pressure Stability: ±0.5MPa (variation under full load), ensuring consistent abrasive impact and surface finish.
5.2 Abrasive and Performance Parameters
Determine efficiency and material compatibility:
Abrasive Compatibility:
Types: Steel grit (16–60 mesh), aluminum oxide (24–80 mesh), silicon carbide (46–120 mesh), garnet (30–80 mesh).
Maximum Abrasive Size: 2mm (prevents nozzle clogging at high pressure).
Abrasive Flow Rate: 50–200 kg/h, adjustable via the vibratory feeder. 50–100 kg/h for fine abrasives (aluminum oxide), 150–200 kg/h for coarse abrasives (steel grit).
Blasting Efficiency:
Steel Surface (rust removal): 5–8 m²/h (50MPa, steel grit 24 mesh).
Concrete Surface (coating removal): 8–12 m²/h (50MPa, aluminum oxide 30 mesh).
Reduction in processing time vs. 15MPa machines: 40–60%.
5.3 Physical and Durability Parameters
Ensure the machine withstands heavy-industry use:
Overall Dimensions:
Length: 2500–3500mm (pump + hopper assembly).
Width: 1200–1500mm.
Height: 1800–2200mm (hopper height).
Weight: 1500–2500kg (dry weight), requiring forklift or crane movement.
Material Durability:
Pump Components: 42CrMo alloy steel (pistons), ceramic coatings (cylinders) for wear resistance.
Hopper: Q235B carbon steel (6mm thick), powder-coated for corrosion protection.
Nozzle: Tungsten carbide (HRC 85–90), service life 200–300 hours (steel grit).
Operating Temperature Range: -10°C to 50°C, suitable for most industrial environments (indoor/outdoor).
5.4 Safety and Compliance Parameters
Meet global industrial standards:
Pressure Safety:
Relief Valve Setting: 55MPa (10% above max operating pressure).
Pressure Vessel Certification: ASME BPVC (US), EN 13445 (EU) for pressure-containing components.
Dust Emission: ≤5 mg/m³ (at operator workstation), complying with OSHA 1910.1000 (US) and EU Directive 2003/10/EC (EU) for workplace air quality.
Noise Level: ≤105 dB(A) (measured at 1m from the blasting gun), complying with OSHA’s 8-hour exposure limit (≤90 dB(A)) when used with hearing protection (required for operators). Optional sound enclosures can reduce noise to ≤90 dB(A) for indoor operations.
Electrical Safety: IP54-rated electrical components (protected against dust and water splashes) for outdoor use, and compliance with IEC 60204-1 (electrical safety for machinery) and NFPA 70 (US National Electrical Code).
5.5 Operational Requirements
Define the infrastructure and setup needed to run the machine safely and efficiently:
Power Supply: 3-phase, 380V/50Hz or 480V/60Hz, with a minimum current capacity of 120A (for 75kW models) to avoid voltage drops during operation. A dedicated circuit breaker (150A) is required to prevent electrical overload.
Compressed Air (If Applicable): For air-assisted blasting models, a compressed air supply of 0.6–0.8MPa (6–8 bar) with a flow rate of 1–2 m³/min is needed to mix with abrasives. The air must be filtered (5μm) and dried (dew point ≤-40°C) to prevent moisture from clogging the abrasive delivery system.
Water Supply (For Wet Blasting Variants): For models with wet blasting capabilities (to reduce dust), a clean water supply (5–10 L/min) with a pressure of 0.2–0.5MPa is required. The water must be filtered (10μm) to remove sediment that could damage the high-pressure pump.
Installation Space: A minimum clear area of 5m × 3m around the machine is needed for operator movement, hose handling, and maintenance. For outdoor use, a level concrete or asphalt surface (load-bearing capacity ≥30 kN/m²) is required to support the machine’s weight (1500–2500kg).
These basic parameters ensure the 50MPa High Pressure Sand Blasting Machine is deployed safely, efficiently, and in compliance with global industrial standards. By aligning infrastructure, operation, and safety parameters with the machine’s extreme-duty design, industries can leverage its full power to tackle tough surface treatment tasks—from oil pipeline rust removal to ship hull maintenance—while protecting operators and the environment.
