Double Venturi Boron Carbide Blast Nozzle

Our Double Venturi boron carbide nozzle features a dual-Venturi internal flow design with circumferential secondary air induction ports.

the core liner is made of hot-pressed B4C ceramic, matched with lightweight aluminum protective jacket. Compared with single venturi nozzles,

it draws extra ambient air to boost total airflow, expands blasting width by 30%–35%, and evenly distributes abrasives across large workpieces.

Perfect for continuous all-day blasting operations, drastically cutting nozzle replacement frequency, machine downtime and overall operating cost.

1. Top grade nozzles

B4C Content: 97%–99%

Only 0.5%–2% trace sintering aid,

total impurities＜1.5%

Hardness HRA92–94,

service life 600–1000h,

fit steel grit, white fused alumina

high-pressure continuous blasting

Mohs Hardness: 9.36, wear resistance 3–5x SiC, 5–10x tungsten carbide

Density: 2.46–2.52g/cm³, lightweight to reduce operator fatigue

Excellent acid & alkali corrosion resistance, stable under harsh blasting dust environment

2. Working Parameters

Working Pressure Range

· Recommended continuous working pressure: 5–7 bar (70–80 PSI) — optimal dual air suction efficiency

· Safe full operating range: 3–8 bar

· Short-time max pressure limit: ≤10 bar (100 PSI)

⚠️ Note: B4C is brittle, avoid instant pressure impact & frequent high-pressure start-stop to prevent cracking

Working Temperature Range

· Continuous inner wall stable temperature: ≤150℃ (no deformation, stable wear resistance)

· Long-term ambient operating temperature: -40℃ ~ 600℃

· Short-time heat resistance peak: 1200℃, melting point 2450℃

⚠️ Forbidden: Sudden cold shock on hot nozzle (e.g. cold water splashing), thermal shock will crack B4C liner

双进风文丘里核心结构优势

1. Dual Air Inlet Boost Efficiency Middle annular secondary air holes generate strong negative pressure, inhale extra air, total air volume increased over 40%, blasting coverage wider by 30%~35%

2. Uniform Abrasive Distribution Long rear diffusion section eliminates local over-blasting, consistent surface roughness on large flat workpieces

3. Three-Stage Venturi Flow Channel Front contraction + middle air suction cavity + rear diffusion, maximize abrasive acceleration speed

4. Detachable Aluminum Protective Jacket Protect fragile B4C core from collision, easy to replace worn inner liner without changing whole nozzle

5. Precision Hot-Pressed Inner Bore Tight tolerance bore keeps stable jet shape long-term, no early expansion & efficiency drop

Double Venturi VS Single Venturi Comparison Table

表格

Item	Double Air Venturi Nozzle	Single Venturi Nozzle
Blast Width	+30%~35%, wide coverage	Narrow jet, small coverage
Productivity	High for large-area blasting	Strong impact for partial heavy rust
Air Consumption	Higher, match big air compressor	Lower, fit small portable blaster
Best Application	Ship, bridge, tank, vehicle whole blasting	Mold, precision parts, local repair blasting
Abrasive Consumption	Lower per square meter	Higher local abrasive waste

七、适配应用场景（精准匹配客户行业）

· Marine & Shipbuilding: Hull rust removal, old paint stripping, deck pretreatment

· Steel Construction: Bridge, storage tank, container large-area descaling

· Automotive Refinish: Truck, engineering vehicle full surface blasting

· Metal Profiling & Stone: Matte surface texturing, oxide layer cleaning Compatible abrasives: Steel grit, white/brown fused alumina, glass bead, silicon carbide